最新刊期
期 1 ， 2018
- 摘要：In this paper,characteristics of friction stir welding and its preliminary application in domestic electric power products are briefly introduced. In the development of large diameter GIL shell,after comparing the spiral welded pipe and longitudinal welded pipe structure,it is found that the spiral welded pipe has the advantages of high production efficiency and low welding stresses. In view of the spiral tube structure,a double side welding scheme is designed,and the experiment of friction stir welding is carried out,the suitable welding parameters are obtained then. The first aluminum alloy spiral tube in China has been successfully developed by using the self-developed spiral pipe welding equipment combined with advanced friction stir welding technology.关键词：friction stir welding;aluminium alloy;spiral tube
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发布时间：2023-03-29 - 摘要：By means of finite element,stress field theory of TC4 titanium alloy and YG8 cemented carbide vacuum brazing process have been studied. According to the conduction equation,boundary conditions and initial conditions,the stress field was simulated.Using abaqus6.11 software platform,nickel-based solder as an example,based on the Mises stress-strain criterion to calculate the post-weld residual stress level,a conclusion can be drawn that the main residual stress exist at the side of hard alloy,and its maximum is 1328 MPa. So the cracks causing by thermal stress should exist the position of maximum stress,and this theoretical result is consistent with experiment result. The test results show that the finite element analysis has important guiding significance for the crack control at the welding seam during the vacuum brazing process.关键词：titanium and carbide;vacuum brazing;finite element analysis;welding residual stress
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发布时间：2023-03-29 - 摘要：Plasma-MAG hybrid welding method and ordinary MAG welding method were used respectively to carry out the welding tests of SUS301L-MT stainless steel middle heavy plates for railway vehicles under the condition of ER308 LSi welding wire and φ（Ar）98%+φ（CO2）2% shield gas selected. The pulsating tensile fatigue test and the fatigue strength estimation were conducted on the butt welded joints and the cruciform joints of plasma-MAG hybrid welding and ordinary MAG welding respectively. The results indicate that the median fatigue strength in fatigue life of 2×106cycle is 279 MPa and 160 MPa for the butt joint and the cruciform joint of plasma-MAG hybrid welding respectively. Compared with ordinary MAG welding, the fatigue strength of plasma-MAG hybrid welded joints increases, in which the fatigue strength of butt joint is higher than that of cruciform joint.关键词：railway vehicle;stainless steel;plasma-MAG hybrid welding;fatigue
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发布时间：2023-03-29 - 摘要：Wire and arc additive manu facturing was carried out by using 316 L wire on Q235 A steel plate,and the effects on the forming were investigated. The microstructure of stainless steel material was analyzed. The results show that the stainless steel wire and arc additive manufacturing forming can be realized by adjusting the welding current,welding speed and wire feeding speed. The forming material has the advantages of high density,good dimensional accuracy and better surface quality,and its microstructure is austenite in the form of columnar dendrites,and the top dendrites are relatively small in size.关键词：wire and arc additive manufacturing;stainless steel;forming technology;TIG welding
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发布时间：2023-03-29 - 摘要：A laser-metal active gas welding（MAG） hybrid welding technology is used to weld Q345 B carbon steel. The effect of the main parameters（contain laser power,defocusing amount and distance between laser and MAG arc）on the welding stability and weld formation are took into account. And verify the feasibility of the hybrid welding technology for single-sided welding double-sided molding. The results show that when the filament spacing is the same,the laser-MAG is deeper than the MAG-laser in welding depth;when distance between laser and arc is less than 2 mm,the arc is stable,when it’s 2 mm,the weld penetration is the largest;when defocusing amount is 0 mm,the arc is the most stable,when it’s-2 mm,the weld penetration is the largest;when the current reaches more than 200 A,the arc has a significant effect on the shielding of the laser. In addition to verify the feasibility of laser arc welding in single-sided welding double-sided forming process.关键词：hybrid welding;weld parameters;penetration;single-sided welding double-sided molding
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发布时间：2023-03-29 - 摘要：A laser-metal active gas welding（MAG） hybrid welding technology is used to weld Q345 B carbon steel. The effect of the main parameters（contain laser power,defocusing amount and distance between laser and MAG arc）on the welding stability and weld formation are took into account. And verify the feasibility of the hybrid welding technology for single-sided welding double-sided molding. The results show that when the filament spacing is the same,the laser-MAG is deeper than the MAG-laser in welding depth;when distance between laser and arc is less than 2 mm,the arc is stable,when it’s 2 mm,the weld penetration is the largest;when defocusing amount is 0 mm,the arc is the most stable,when it’s-2 mm,the weld penetration is the largest;when the current reaches more than 200 A,the arc has a significant effect on the shielding of the laser. In addition to verify the feasibility of laser arc welding in single-sided welding double-sided forming process.关键词：hybrid welding;weld parameters;penetration;single-sided welding double-sided molding
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发布时间：2023-03-29 - 摘要：C24S Al-Li plates with 2 mm thickness were successfully joined by FSW and TIG welding methods. The microstructure and fracture morphology of welding joints with the two welding methods were observed and analyzed by optical microscopy and scanning electron microscopy,the room temperature tensile properties and micro-hardness were also tested. The results show that TIG welding joint is composed of coarse microstructure,the serious porosity defects and the dissolution of strengthening phases in the weld zone all lead to the decrease of mechanical properties and plasticity,the tensile strength of joint is only 47.9% of the base metal and the microhardness is 92 HV. The welding joint with FSW welding has good formation and small microstructure,the strengthening phase does not dissolve,which leads to the tensile strength of weld joint reach 82.6% of the base metal and micro-hardness is up to 115 HV,and the joint exhibits good plasticity.关键词：C24S Al-Li alloy;TIG welding;FSW welding;microstructure;mechanical properties
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发布时间：2023-03-29 - 摘要：In view of welding process,joint condition,crack shape,and facility structure,analyzes the causes for cracking of weld joints of connecting pipes from low-temperature superheater to pendant superheater at a power plant in operation. The results show that weld joints are exposed to stress concentration with coarse HAZ grains while various stresses overlap to create peak stress within the sensitive temperature of reheat cracking. Thus,the peak stress leads to loosening stress and results in cracking. To avoid such problems,a few effective repair procedures and preventive countermeasures are proposed,providing reference for enterprises to prevent and control similar problems.关键词：12Cr1MoVG steel;reheat cracking;connecting pipes;superheater
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发布时间：2023-03-29 - 摘要：In this paper,contact brazing technique was used to weld nickel and copper on the surface of stainless steel,and Mg powder was added as the intermediate reaction layer for brazing. The connection between 3003 aluminum alloy and stainless steel was carried out. The mechanical properties of welded joints were measured by universal testing machine. The microstructures and element distributions of the joints were observed by scanning electron microscopy（SEM）. The interface morphology,phase composition and connection mechanism were analyzed. When the brazing temperature is 560 ℃ and welding pressure is 0.1 MPa,effective connection holding time is 15 min for contact reactive brazing of the two joints the maximum shear strength of 23.1 MPa,the average shear strength of 21.6 MPa,filler metal Al atom diffusion is obvious,and the formation of Al-Mg,Al-Cu,Al-Fe and other intermetallic compounds.关键词：aluminum steel;contact reaction brazing;microstructure
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发布时间：2023-03-29 - 摘要：<正>在新的一年里,中国电器工业协会电焊机分会（以下简称分会）要认真贯彻党的十九大关于经济工作的新要求,继续坚持稳中求进的工作总基调,在中国电器工业协会（以下简称中电协）和分会理事会领导下,坚定不移做好行业和会员的服务工作。2018年度分会要看重做好以下工作:
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发布时间：2023-03-29 - 摘要：<正>为确保杂志质量,尊重和保护作者及他人的知识产权、著作权,构建公平合理、规范健康的学术平台,严格杜绝"学术不端行为"发生,《电焊机》杂志特作以下声明。1、从本声明公布之日起,凡向本刊投稿,作者均应严格遵守《中华人民共和国著作权法》《中华人民共同和知识产权法》等国家有关法律法规,来稿如出现以下任何情况:抄袭剽窃,篡改他人学术成果,伪造或篡改数据、文献,捏造事
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发布时间：2023-03-29 - 摘要：<正>各相关单位:"2018·中国焊接产业论坛——机器人焊接技术及应用"将于2018年5月5-7日在珠海召开。本次会议由中国焊接协会主办,中国机械工程学会为指导单位,德国焊接学会、美国焊接学会、新加坡焊接学会、中国机械工程学会焊接分会、中国电器工业协会电焊机分会、北京工业大学
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发布时间：2023-03-29 - 摘要：<正>各有关单位:全国电焊机标准化技术委员会（SAC/TC70）是经国家标准化管理委员会批准设立的,在全国范围内负责电焊机领域标准化工作的专业标准化技术委员会。第六届SAC/TC70已届满,根据《全国专业标准化技术委员会管理办法》（总局令第191号）的相关要求,现开始筹备标委会换届工作。本着广泛参与的原则,现面向全国各有关单位公开征集第七届技术委员会委员。有关事项通知如下:
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发布时间：2023-03-29 - 摘要：<正>2018年1月18日,由美国空气化工产品有限公司主办、成都三力机电设备公司承办的"焊接气体、多股复合焊丝技术研讨会,快易冷混合气焊接集中供气、激光清洗等现场演示会"在四川工程职业技术学院成功举行。来自成都、重庆、德阳、宜宾、泸州、绵阳等地的东方电机有限公司、东方汽轮机有限公司、东方锅炉股份有限公司、二重集团股份有限公司、东方电气集团中央研究院等焊接企业的科研人员、工程技术人员和企业领导约130人参加了研讨会。
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发布时间：2023-03-29 - 摘要：This paper introduces an automatic offline programming software for industrial robot which is used in the spraying system for movable hanging box, explains the structure, the core principle and realized function of the software, emphatically introduces the singularity problems in robot trajectory planning and solutions, and according to the actual spraying effect, related suggestions and prospects are proposed. This automatic off-line programming technology, not only can be used for robot trajectory planning, the development of a computer software that can automatically generate robot operation program, can also verify the rationality of the spraying process by using the simulation software, and then modify the program structure to achieve optimization, effectively avoids the singularity problem of robot motion. The use of software can avoid the manual operation of robot and graphic operation in off-line programming, and minimize human intervention. It has high value of popularization and application.关键词：industrial robot;singularity;trajectory planning;offline programming
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发布时间：2023-03-29 - 摘要：AC motor rotor end ring and conducting bar welding,the whole induction heating by induction heater on the end ring bar,realize induction brazing,therefore,to realize the welding of rotor end ring copper bar,the induction heater is a key link of development. This article through several aspects of rotor end ring bar welding induction heater design principle,induction heater composition,induction heater and end ring assembly form,application of induction heater evaluation to develop a reliable induction heater,to solve the problem of AC motor rotor copper end ring and guide bar welding integral induction heating,guarantee the motor rotor end ring bar welding quality.关键词：motor rotor copper end ring and guide strip brazing;induction heater;development
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发布时间：2023-03-29 - 摘要：he 5356 aluminum alloy rapid prototyping test was carried out by MIG welding. The morphology and microstructure characteristics of 5356 aluminum alloy moldings,effect of welding current and interlayer cooling time on molding structure and mechanical properties were observed by universal testing machine,optical microscope and scanning electron microscope,et al. The results show that there are mainly α（Al）,β（Mg5Al8） and（FeMn）Al6 in the forming parts. The tensile strength of the forming parts increases with the increase of welding current in same interlayer cooling time. The highest tensile strength of the forming parts reaches 273.57 MPa when the interlayer cooling time is 60 s,the welding current is 90 A. The tensile strength get decrease when continue to increase the welding current. The tensile strength of the molded parts increases with the increase of interlayer cooling time in same welding current. When the interlayer cooling time is 60 s,the shape of the forming parts is relatively beautiful.关键词：rapid prototyping;welding current;interlayer cooling time;microstructure;mechanical properties
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发布时间：2023-03-29 - 摘要：he 5356 aluminum alloy rapid prototyping test was carried out by MIG welding. The morphology and microstructure characteristics of 5356 aluminum alloy moldings,effect of welding current and interlayer cooling time on molding structure and mechanical properties were observed by universal testing machine,optical microscope and scanning electron microscope,et al. The results show that there are mainly α（Al）,β（Mg5Al8） and（FeMn）Al6 in the forming parts. The tensile strength of the forming parts increases with the increase of welding current in same interlayer cooling time. The highest tensile strength of the forming parts reaches 273.57 MPa when the interlayer cooling time is 60 s,the welding current is 90 A. The tensile strength get decrease when continue to increase the welding current. The tensile strength of the molded parts increases with the increase of interlayer cooling time in same welding current. When the interlayer cooling time is 60 s,the shape of the forming parts is relatively beautiful.关键词：rapid prototyping;welding current;interlayer cooling time;microstructure;mechanical properties
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发布时间：2023-03-29 - 摘要：In this paper, one-side welding procedure of Q345R/316 L clad plate with 13+3 mm thickness produced in Shougang was studied. The welding sequence was a three-step process,including stainless steel layer welding,transition layer welding and carbon layer welding. The performance of welded joint was analyzed by using tensile test,impact test,bending test and hardness test. The results show that the mechanical property and intergranular corrosion resistance meet the requirements of the relevant technical standards and demands of the users. In addition,the dilution effect of stainless steel layer welding on carbon layer welding in the weld zone of the joint is studied. The first carbon layer welding is suffered the impact of stainless steel,its hardness raises sharply,the hardness and chemical composition of the carbon layer welding are not affected until the fourth carbon layer welding.关键词：clad plate;stainless steel;one-side welding;intergranular corrosion resistance
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发布时间：2023-03-29 - 摘要：The magnetically controlled narrow-gap welding technology was used to weld the 30 mm and 100 mm thick TC4 titanium alloy. Welding was performed under different magnetic induction,after that the microstructures of the joints were analyzed to study the influence of the magnetic field on weld structure. Typical defects of the joints were studied,and the effects of arc swing and electrode position on weld formation were studied. Mechanical properties of the joints were tested. The results show that the applied magnetic field has the effect of fine grain and size of needle-type martensite in the weld was significantly decreased. The external magnetic field can effectively avoid the problem of poor sidewall fusion and achieve joints with good fusion sidewall. Electrode should be strictly placed in the center of the gap in order to obtain a uniform sidewall penetration. Welded joints had good mechanical properties,the average tensile strength of the joints reached 96% of that of the base metal.关键词：titanium alloy;TC4;thick plate;narrow-gap welding;magnetically controlled
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发布时间：2023-03-29 - 摘要：The magnetically controlled narrow-gap welding technology was used to weld the 30 mm and 100 mm thick TC4 titanium alloy. Welding was performed under different magnetic induction,after that the microstructures of the joints were analyzed to study the influence of the magnetic field on weld structure. Typical defects of the joints were studied,and the effects of arc swing and electrode position on weld formation were studied. Mechanical properties of the joints were tested. The results show that the applied magnetic field has the effect of fine grain and size of needle-type martensite in the weld was significantly decreased. The external magnetic field can effectively avoid the problem of poor sidewall fusion and achieve joints with good fusion sidewall. Electrode should be strictly placed in the center of the gap in order to obtain a uniform sidewall penetration. Welded joints had good mechanical properties,the average tensile strength of the joints reached 96% of that of the base metal.关键词：titanium alloy;TC4;thick plate;narrow-gap welding;magnetically controlled
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发布时间：2023-03-29 - 摘要：The surfacing is conducted on nickel-base alloy 690 layers on the low alloy steel（SA508-3） by using the temper bead technology to prepare the specimens. The microstructures of the heat-affected zones（HAZ） corresponding to the different layers of specimen are researched. The results show that the martensitic transformation of HAZ is found after the first layer surfacing by using welding technology in this paper. The martensite temper transformation occurs in the welding thermal process of follow-up surfacing layers,and the transformation effect accumulates as the layer increases,finally the bad quenching microstructure of HAZ is corrected completely. Because of insufficient temper caused by insufficient cumulative time of high-temperature temper in the area near by the toe of weld at the both ends of the specimen,the martensite produced in HAZ by the first layer surfacing and the martensite generated by the decomposition of residual austenite in HAZ are corrected incompletely,but this problem can be resolved by the additional welding with specific technology.关键词：low alloy steel SA508-3;temper bead;heat-affected zone;microstructure
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发布时间：2023-03-29 - 摘要：The surfacing is conducted on nickel-base alloy 690 layers on the low alloy steel（SA508-3） by using the temper bead technology to prepare the specimens. The microstructures of the heat-affected zones（HAZ） corresponding to the different layers of specimen are researched. The results show that the martensitic transformation of HAZ is found after the first layer surfacing by using welding technology in this paper. The martensite temper transformation occurs in the welding thermal process of follow-up surfacing layers,and the transformation effect accumulates as the layer increases,finally the bad quenching microstructure of HAZ is corrected completely. Because of insufficient temper caused by insufficient cumulative time of high-temperature temper in the area near by the toe of weld at the both ends of the specimen,the martensite produced in HAZ by the first layer surfacing and the martensite generated by the decomposition of residual austenite in HAZ are corrected incompletely,but this problem can be resolved by the additional welding with specific technology.关键词：low alloy steel SA508-3;temper bead;heat-affected zone;microstructure
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发布时间：2023-03-29 - 摘要：In order to fill the domestic technology gaps and improve the capability of self-maintenance of main equipment in nuclear power plants,the automatic welding technology for replacing in-service heater elements of voltage stabilizer is researched. According to the characteristics of replacing in-service electric heater and the shortcomings of existing technology,the closed welding head is developed,which improves the stability of welding arc and gas shielded effect. Through a large number of automatic welding technology tests,the influence of protective atmosphere,specimen size and the chemical composition of base metal on the appearance of weld are discussed,and the welding parameters are determined. The results show that the use of argon backside protection and helium front protection welding can ensure complete penetration and protective effect on backing pass;the deviation of specimen structure size can affect the appearance of weld due to different heat dissipation;and the higher the content of S in the base metal chemical composition,the easier it is to penetrate.关键词：voltage stabilizer;electric heater;welding power source;automatic welding;welding head
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发布时间：2023-03-29 - 摘要：Special welding simulation soft SYSWELD is applied to simulate temperature field and stress field of multi-layer multipass welding for dissimilar metals in casing pipe structure,and the metallographic section observation and X-ray diffraction stress test are used to check the simulation model. The results show that the weld section obtained by simulative welding temperature field of checked model is consistent with the actual weld section,the temperature of the root joint fluctuates 14 times over time,each fluctuation has two peaks;simulation results are basically same with residual stress measured by X-ray diffraction,the distributions of axial residual stress at different welding position demonstrate similar regulation,axial residual stress at welding position of 0 degree and 90 degree are much higher,and the maximum residual stress is close to 300 MPa;numerical valves and distribution of circumferential residual stress at different welding position are same,the maximum circumferential residual stress is close to 300 MPa at 15 mm away from the root of first weld;the maximum Von Mises stress appears in the heat affected zone of low alloy steel,and the maximum Von Mises stress at welding position of 90 degree is 377 MPa.关键词：casing structure;multi-pass;residual stress;numerical simulation
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发布时间：2023-03-29 - 摘要：A thermal-mechanical coupling model of whole FSW process of 6061 Al alloy sheet is established based on the solid mechanics theory. Material flow behavior of whole FSW process is studied by using arbitrary Lagrangian-Eulerian（ALE）mesh adaptive technique and particle tracking technique. The results show that the material around the stir zone moves to the back of the stir head mainly in the form of rotating flow and laminar flow. The material on the upper surface has a tendency to move downward spirally affected by the shoulder whereas the material in middle part first moves in a spiral upward mode affected by the pin and then moves downward. Near the bottom of the weldment,metal material moves to the back of stir head mainly in the form of laminar flow.关键词：friction stir welding;whole process;numerical simulation;material flow behavior
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发布时间：2023-03-29 - 摘要：Nickel aluminum bronze（NAB）is one of the main materials used for making ship propellers. Large ship propellers are generally castings. The coarse and inhomogeneous microstructure of the cast NAB will reduce the lifetime of the ship propellers. In present study,laser surface melting（LSM）is applied to modify the cast microstructure. The results show that the LSM significantly refines the cast microstructure. The melting zone contains fine columnar grains,and the major axis of the columnar grains is perpendicular to the interface of the molten pool. The heat affected zone（HAZ）consists of coarse isometric and columnar grains. The hardness of the LSM NAB can reach 285325 HV,which is increased by 50%70% comparing with the hardness of the cast one. The electrochemical measurement results show that the LSM NAB and cast NAB experience similar electrode reaction processes in 3.5% Na Cl solution. However,comparing with the cast NAB,the cathode process of the LSM NAB is slower and therefore the corrosion rate is slower. The ultrasonic vibration cavitation erosion test results show that the erosion rate of the LSM NAB is only 60% of that of the cast one because of the increased hardness and refined microstructure. For LSM NAB,the damaged surface is much evener,and no large cavitation erosion pit is found. And the effect of LSM parameters on the microstructure,corrosion and cavitation erosion behavior is also discussed.关键词：nickel aluminum bronze;laser surface melting;corrosion;cavitation erosion
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发布时间：2023-03-29 - 摘要：The new low energy welding technology is a new welding method and completes metal transfer by push-pull wire feed,there is no spatter during the welding process,and the heat input is reduced effectively. The current output and the wire movement match each other to achieve a stable welding. Through the welding procedure test,the influence of control parameters（such as arc peak current I1,hold time T1,wire feed rate v1,the delay time of wire feed T4,wire withdrawal rate v2 and the delay time of wire withdrawal T5,etc.）on the deposition rate of wire is studied. The results show that as the I1,T1,v1,v2 and T5increase the deposition rate of wire improves,and the effect of I1 and T1on the deposition rate is outstanding,but the effect of v2 and T5 is not obvious,and with the increase of T4,the deposition rate decreases,so that the deposition rate of wire can be controlled effectively by adjusting the welding parameters appropriately.关键词：push-pull wire;sheet metal welding;control parameters;deposition rate
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发布时间：2023-03-29 - 摘要：The new low energy welding technology is a new welding method and completes metal transfer by push-pull wire feed,there is no spatter during the welding process,and the heat input is reduced effectively. The current output and the wire movement match each other to achieve a stable welding. Through the welding procedure test,the influence of control parameters（such as arc peak current I1,hold time T1,wire feed rate v1,the delay time of wire feed T4,wire withdrawal rate v2 and the delay time of wire withdrawal T5,etc.）on the deposition rate of wire is studied. The results show that as the I1,T1,v1,v2 and T5increase the deposition rate of wire improves,and the effect of I1 and T1on the deposition rate is outstanding,but the effect of v2 and T5 is not obvious,and with the increase of T4,the deposition rate decreases,so that the deposition rate of wire can be controlled effectively by adjusting the welding parameters appropriately.关键词：push-pull wire;sheet metal welding;control parameters;deposition rate
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发布时间：2023-03-29 - 摘要：The end plates of tubular lignite drying machine are made by circular super-thick steel plate,on which there are a large number of drilled circular holes. This structure is mainly accomplished by welding and machining with heavy weight,a lot of welds,a large quantity of welding tasks,and high requirements on parts machining and assembly accuracy,so its quality is very strict in manufacturing. According to the structure of the end plates of tubular lignite drying machine,the reasonable welding and machining technologies and quality control for key parts are summarized to provide reference for the production of other large-scale rotating mechanical equipments.关键词：tubular lignite drying machine;end plate;manufacturing process;quality control
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发布时间：2023-03-29 - 摘要：The research status of the jointing of Si C particle reinforced Al-based composites is reviewed. The problems and solutions of the welding of Si C Al-based composites by using fusion welding,electric resistance welding,high-energy beam welding,friction stir welding,brazing and transient liquid-phase bonding are analyzed. In general,Si C particle reinforced Al-based composite is still in the experimental stage now,and the joining method and mechanism need to be further studied for engineering application.关键词：Si C particle reinforced Al-based composite;welding technology;research status
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发布时间：2023-03-29 - 摘要：In a rough rolling mill,when the 650 roller contacts with the surface of the rolled material at a high temperature,the roller surface may crack and roller pass may wear due to the combined action of working pressure,impact,wear and thermal cycle. Thus,the roller should be replaced timely. The repair technologies of submerged-arc welding and surfacing are widely used to repair the replaced roller.The repaired roller must satisfy the use requirements,namely the roller surface must have high hardness and high temperature wear resistance,so it is very important to select welding materials and develop a reasonable welding technology.关键词：650 rolling mill;roller;submerged-arc welding;repair technique
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发布时间：2023-03-29 - 摘要：The oxygen and carbon dioxide are available active gas and both are commonly applied in MAG welding,the amount of their addition has definite influence on the fatigue performance of austenitic stainless steel. Through pulsating tensile fatigue test and metallographic structure analysis,the fatigue performance of MAG welding butt joint of 06Cr19Ni10 steel with two different kinds of protective atmospheres is studied. The results show that the median fatigue strength of φ（Ar）95% +φ（CO2）5% is 300 MPa,the median fatigue strength of φ（Ar）97%+φ（O2）3% is 302.5 MPa. The fracture location of specimen mainly concentrates in the heat affected zone. The crack starter location is obvious in the crack initiation zone;the fatigue striations on the extending zone are clear;the final broken zone is the toughness dimple type of fracture;the matrixes of the microstructures of two types of welded joints are both austenitic,and there are δ ferrites distribute on the matrix.关键词：06Cr19Ni10 stainless steel;MAG welded joint;microstructure;fatigue performance
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发布时间：2023-03-29 - 摘要：The welding method and technology of the water heater tank in the solar water heater industry are introduced. And the argon tungsten arc welding and electric resistance seam welding commonly used for the atmospheric pressure solar vacuum heat pipe water heater tank,and their welding technologies and technical points are mainly expound. Finally,the CO2 gas shielded arc welding and its welding technology for the pressure type solar water heater tank are briefly introduced. It is hoped to provide some reference for the relevant personnel engaged in the manufacturing of solar water heater tank.关键词：solar water heater;tank;welding method and technology;vacuum collector tube
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发布时间：2023-03-29 - 摘要：IIn the welding methods of aluminum-steel dissimilar metal,the welding-brazing method of aluminum-steel dissimilar metals has attracted more and more attention because of its high efficiency and wide applied range. The welding-brazing technology mainly includes arc welding-brazing, laser welding-brazing, electron beam welding-brazing and laser +arc hybrid welding-brazing.The research status of different welding-brazing methods is summarized,and the welding properties of different welding-brazing methods are analyzed. In the process of aluminum/steel dissimilar metal arc welding-brazing,a new low heat input welding method can achieve precise control of welding heat input and obtain welded joints with high performance;high energy beam welding method can strictly control the heat input to achieve a stable welding process,but it has high requirements on the assembly accuracy of welding structure and needs a large one-time investment in the equipments;laser+arc hybrid welding and arc assisted laser welding combine the advantages of electric arc welding and laser welding,and have wide application prospect in the welding-brazing of aluminum/steel dissimilar metals.关键词：aluminum-steel dissimilar metals;welding joint;welding-brazing
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发布时间：2023-03-29 - 摘要：The wind turbine rotor is alloy steel 42CrMo and Q235B dissimilar steel structure,the SMAW and MAG hybrid welding are used to perform the welding experiments. Through metallographic microscope,universal mechanical testing machine and scanning electron microscope analysis,the microstructure properties and appearance of fracture of the welded joints are observed and analyzed.The results show that the increase of welding heat input will reduce the bending properties and low temperature impact properties of welded joints of 42CrMo and Q235B,in the actual welding of motor,the welding heat input,preheat temperature and interpass temperature should be controlled;the microstructure,mechanical properties and the appearance of impact fracture and other technical indicators of welded joints in the 42CrMo and Q235B dissimilar steels prepared by a welding technology with a small heat input all meet the relevant standards,which provides strong technical support for the welding of motor rotor.关键词：42CrMo;Q235B;microscopic structure;mechanical property
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发布时间：2023-03-29 - 摘要：The wind turbine rotor is alloy steel 42CrMo and Q235B dissimilar steel structure,the SMAW and MAG hybrid welding are used to perform the welding experiments. Through metallographic microscope,universal mechanical testing machine and scanning electron microscope analysis,the microstructure properties and appearance of fracture of the welded joints are observed and analyzed.The results show that the increase of welding heat input will reduce the bending properties and low temperature impact properties of welded joints of 42CrMo and Q235B,in the actual welding of motor,the welding heat input,preheat temperature and interpass temperature should be controlled;the microstructure,mechanical properties and the appearance of impact fracture and other technical indicators of welded joints in the 42CrMo and Q235B dissimilar steels prepared by a welding technology with a small heat input all meet the relevant standards,which provides strong technical support for the welding of motor rotor.关键词：42CrMo;Q235B;microscopic structure;mechanical property
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发布时间：2023-03-29 - 摘要：<正>智能焊接系统关键技术及应用（2018年2月）关注技术:高智能焊接系统及其关键技术;焊接机器人相关设备及技术;智能制造中焊接工艺、焊接装备、焊接材料的一体化;机器人焊接的建模及仿真,新型焊接电源中功率器件的应用;机器人焊接过程中的视觉传达及焊缝跟
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发布时间：2023-03-29 - 摘要：<正>近年来,随着高速铁路技术的不断成熟、迅速发展和快速推广,从牵引系统、各种构件到车体的焊接,从低碳钢、低合金钢、高强钢、不锈钢到铝合金,从焊条电弧焊、埋弧焊、气保焊、搅拌摩擦焊到智能化、自动化及信息化焊接,高铁焊接技术有了突飞猛进的发展。《电焊机》杂志将针对"高速列车金属材料及先进焊接技术"开展专题讨论,2018年4月在中国唐山举办"2018’高速铁路先进焊接技术国际研讨会",2018年第3期《电焊机》杂志正刊为本次国际研讨会指定专刊（出版时间2018年3月20日）,
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发布时间：2023-03-29 - 摘要：<正>《电焊机》杂志是中国科技论文统计源期刊（中国科技核心期刊）、《中文核心期刊数据库》收录期刊、"英国《科学文摘》（INSPEC）来源期刊""俄罗斯《文摘杂志》收录期刊""美国《剑桥科学文摘》（CSA）收录期刊""波兰《哥白尼索引》（IC）"收录期刊等。各地邮局均可订阅,邮发代号:62-81,订价:15元/月,180元/年。
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发布时间：2023-03-29 - 摘要：<正>书号:230定价:34元本书是为满足普通高等教育"材料成型及控制工程"专业毕业后从事焊接技术工作的学生、材料加工工程专业焊接方向的研究生了解和掌握焊接专业基础知识,以及企业开展焊接工程师培训和焊接工程技术人员自学焊接专业基础知识的需要而编写的"焊接工程师系列教程"之一。主要内容有:焊接电弧的电特性和焊接工艺对弧焊电源的要求,弧焊电源
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发布时间：2023-03-29 - 摘要：<正>书号:227定价:49元本书是为满足普通高等教育"材料成形及控制工程"专业毕业后从事焊接技术工作的学生、焊接方向的研究生了解和掌握焊接专业基础知识,以及企业开展焊接工程师培训和焊接工程技术人员自学焊接专业基础知识的需要而编写的"焊接工程师系列教程"之一。全书共11章,主要内容为:前3章系统地论述了作为熔接电弧
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发布时间：2023-03-29 - 摘要：<正>好书推荐,欲购从速!书号:0232定价:41元本书主要讲述如何控制焊接变形。内容包括焊接变形的规律和梁、柱焊接弯曲变形的计算,焊接板结构箱形梁腹板预拱度计算,减小焊接变形的方法,焊接变形的机械矫正方法、火焰矫正的机理和火焰矫正的实际操作方法。本书适合于从
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发布时间：2023-03-29 - 摘要：<正>好书推荐,欲购从速!书号:0239定价:45元本书系统介绍了逆变焊机的原理及设计方法,共分为5章。第1章介绍了焊机的发展过程:从弧焊发电机发展为逆变焊机,从晶闸管逆变焊机发展为IGBT逆变焊机,并向着数字化的方向发展。第2章介绍了逆变焊机的主电路设计、功率开关器件的选用和计算,以及控制电路的设计。
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发布时间：2023-03-29 - 摘要：<正>书号:0099定价:41元本书是中国焊接协会培训工作委员会根据劳动部《锅炉压力容器焊工考试规则》和机械电子工业部焊工持证上岗要求组织编写的。本书重点介绍了手工电弧焊、C02气体保护焊、埋弧焊、手工鸽极氢弧焊四种焊接方法使用的材料、设备及工艺参数,按实际考试项目要求,详细介绍了61个考核实例.这些实例是吸收
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发布时间：2023-03-29 - 摘要：<正>书号:0095定价:16元焊接操作中存在诸多危险因素和有害因素,可能发生触电、火灾、爆炸、灼烫和高处坠落等工伤事故,还可能患眼睛、皮肤、呼吸系统和血液等疾病。因此,焊接属于特种作业,电气焊工属于特殊工种,遵照国务院颁布的有关规定,焊工必须经过安全培训并考试合格,方准独立操作。并且在取得安全考核合格证之后,尚需定
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发布时间：2023-03-29 - 摘要：<正>书号:0163售价:46元本书对易于实现自动化和智能化生产的气体保护焊技术及工程中的应用作了简明地阐述,力求突出先进性和实用性特色。本书主要针对工程中最常见的惰性气体保护焊（TIG、MIG）、活性气体保护焊（CO2焊、MAG）、等离子弧焊（PAW）等焊接方法,突出了各种气体保护焊的工艺特点和应用。给出了具体的工艺参数、相关技术数据及针对一些典型
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发布时间：2023-03-29 - 摘要：<正>书号:0233定价:55元本书概括地介绍了压力容器的结构特点和常用接头形式,压力容器用钢的现行标准及其对理化性能的要求。阐明了对压力容器用焊接材料的基本要求、相关标准及选择原则,在压力容器制造中常用焊接方法的工艺特点和适用范围以及相应焊接设备和工艺装备的技术特性与选用依据、较详细地论述了压力容器制造工艺过程、焊接工艺评定
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发布时间：2023-03-29
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