CF3燃料组件下管座钎焊工艺及缺陷控制
Study on Brazing Process and Defects Control of CF3 Fuel Assembly Bottom Nozzle
- 2022年52卷第12期 页码:77-84
DOI: 10.7512/j.issn.1001-2303.2022.12.09
扫 描 看 全 文
扫 描 看 全 文
李莎,袁野,钟多军.CF3燃料组件下管座钎焊工艺及缺陷控制[J].电焊机,2022,52(12):77-84.
LI Sha, YUAN Ye, ZHONG Duojun.Study on Brazing Process and Defects Control of CF3 Fuel Assembly Bottom Nozzle[J].Electric Welding Machine, 2022, 52(12): 77-84.
CF3型先进压水堆燃料组件下管座为空间曲面结构,需采用真空钎焊工艺组装焊接。针对304L不锈钢母材和BNi-7钎料的特点,确定了钎焊工艺曲线,并测试分析钎焊循环次数对母材冲击性能、室温及高温抗拉强度,以及钎缝剪切强度和微观组织的影响。结果表明:即使经过四次钎焊循环工艺,母材和钎缝的力学性能及微观组织也没有受到明显不利影响。为提高生产效率和降低能耗,推荐采用二次钎焊循环组装并可选第三次钎焊循环补焊的工艺。通过调整配合间隙,改进下管座结构件的结构、导向管座孔加工工艺和双叶片结构,避免了流道堵塞、未钎到、未钎满等缺陷,提高了产品成品率和生产效率。
The bottom nozzle of CF3 advanced PWR fuel assembly is a creative space curved structure, which needs to be assembled and brazed by the vacuum brazing technology. According to the characteristics of 304L stainless steel base metal and BNi-7 filler metal, the brazing process curve was determined. Then the effect of brazing cycles on the impact properties, room temperature and high temperature tensile strength of the base metal, as well as the shear strength and microstructure of the brazed joints were tested and analyzed. The results show that even after four-stage brazing cycles, the mechanical properties and microstructure of the base metal and brazed joints are not significantly adversely affected. In order to improve production efficiency and reduce energy consumption, it is recommended to use two-stage brazing cycles assembly, plus the optional third brazing cycle repair brazing process. And also, through adjusting the joint clearance, improving the structure of the bottom nozzle, the machining process of the guiding tube hole, and the structure of the double blade, the defects such as flow channel blockage, lack of filler metal, and so on, are avoided. Eventually, the product yield is increased and production efficiency are raised.
CF3压水堆燃料组件力学性能微观组织钎焊循环工艺缺陷控制
CF3 PWRfuel assemblymechanical propertymicrostructurebrazing cycledefects control
焦拥军,肖忠,李云,等.“华龙一号”燃料组件设计研究及验证[J].中国核电, 2017,10(4):478-482.
JIAO Y J,XIAO Z,LI Y,et al.R&D and Validation of HPR1000 Fuel Assembly[J].China Nuclear Power,2017, 10(4):478-482.
凌祥,涂善东,陆卫权.板翅式换热器的研究与应用进展[J].石油机械,2000,28(5):54-58.
LING X,TU S D,LU W Q.Advances in development and application of plate-fin heat exchangers[J].China Petroleum Machinery,2000,28(5):54-58.
徐卫平,白文彬,邱望标.蜂窝材料的真空钎焊工艺及应用[J].材料研究与应用,2008,2(1):71-74.
XU W P,BAI W B, QIU W B.The craft and application of vacuum brazing for honeycomb material[J].Materials Research and Application,2008,2(1):71-74.
邓云华,岳喜山,管志超.304不锈钢消音蜂窝钎焊工艺、组织及力学性能分析[J].材料导报,2018,032(014):2425-2430.
DENG Y H,YUE X S,GUAN Z C.Study on the Brazing Process,Microstructure and Mechanical Properties of 304 Stainless-steel Soundproof Honeycomb Core Sa-ndwich Panels[J].Materials Reports,2018,032(014):2425-2430.
庄鸿寿,罗格夏特.高温钎焊[M].北京:国防工业出版社,1989:41-42.
丁海峰,杨吉春,张春香,等.固溶处理对304L不锈钢晶粒长大及力学性能的影响[J].材料热处理学报,2016,37(008):102-107.
DING H F,YANG J C,ZHANG C X,et al.Effect of solution treatment on grain growth and mechanical properties of 304L stainless steel[J].Transactions of Materials and Heat Treatment,2016,37(008):102-107.
路文江,沙涤尘.镍基钎料钎焊接头MBC值的提高[J].焊接技术,1999(1):10-11.
LU W J,SHA D C.Improvement of the MBC of nickel-based brazing joints[J]. Welding Technology,1999(1):10-11.
金霞,经敬楠,顾小龙,等.BNi7钎料真空钎焊316L不锈钢接头的组织与性能[C]//第十九次全国焊接学术会议,2014.
蒋文春,巩建鸣,涂善东.冷却方式对不锈钢板翅结构强度和微观组织的影响[J].压力容器,2009,26(11):16-20.
JIANG W C,GONG J M, TU S D.Effect of Cooling Method on Microstructure and Tensile Strength for 304 Stainless Steel Plate-fin Structure[J].Pressure Vessel Technology,2009,26(11):16-20.
李勇,寇宏超,柳木桐,等.热处理对奥氏体不锈钢00Cr18Ni10N组织和性能的影响[J].科技导报,2011,29(5):37-40.
LI Y,KOU H C,LIU M T,et al.Influence of Heat Treatment on Microstructure and Mechanical Property of Austenitic Stainless Steel[J].Science & Technology Review,2011,29(5):37-40.
经敬楠.BNi-7钎料真空钎焊纯Fe、纯Ni、纯Mo、纯Cr及扩散行为研究[D].上海:上海工程技术大学,2012.
JING J N.The study of joint brazed with BNI-7 and its diffusing behavior for pure Fe,Ni,Mo,Cr[D].Shanghai:Shanghai University of Engineering Science,2012.
赵兴保,李宁,文玉华,等.钎焊工艺对BNi7钎焊不锈钢接头组织性能的影响[C]//全国钎焊及特种连接技术交流会,2008.
Philips N R,Levi C G,Evans A G.Mechanical of microstructure evolution in an austectic stainless steel bond generated using a quaternary braze alloy[J].Metallurgical and Materials Transactions A,2008,39(1):142-149.
相关作者
相关机构