扫 描 看 全 文
成晓雷，唐文敏，汪选国.H62黄铜与T2紫铜搭接激光焊接工艺和焊缝微观组织研究［J］.电焊机，2023，53（7）：52-59.
CHENG Xiaolei, TANG Wenmin, WANG Xuanguo.Research on Laser Welding Process and Microstructure of H62 Brass and T2 Copper[J].Electric Welding Machine, 2023, 53(7): 52-59.
黄铜和紫铜形成的异种金属复合结构可以兼顾黄铜的机械性能和紫铜的导热性能，因此在航空航天、汽车、制冷设备等领域经常需要将两者进行焊接。采用光纤激光器对H62黄铜与T2紫铜薄板搭接激光焊接进行试验。对比研究了激光功率、焊接速度等主要工艺参数对焊缝成形性能、力学性能的影响，获得具有良好外观的焊接接头。当热输入大于10,5, J/mm时，焊接模式由激光热导焊转变为激光小孔深熔焊，熔深大幅升高，当激光功率为1 800 W，焊接速度为13 mm/s时获得了最大深宽比为2.51。分析了焊接接头及界面处成分、组织的分布与演化，探究了组织和力学性能之间的关系。发现熔池流动以环形流动为主，形成了焊缝中心锌元素含量高于焊缝边缘的成分分布。提出熔池流动和成分偏析造成的成分不均匀是接头组织和性能不均匀的主要原因。焊缝中心硬度测试显示，在两材料界面附近存在较大的硬度梯度，发现较高的热输入可以促进两材料混合，降低界面处力学性能差异。
It is often necessary to weld brass and copper in aerospace, automobile, refrigeration equipment and other fields, because the dissimilar metal composite structure formed by the two has the mechanical properties of brass and the thermal conductivity of copper. In this paper, the laser welding of H62 brass and T2 copper plate was studied by fiber laser. The influence of laser power, welding speed and other main process parameters on the forming properties and mechanical properties of the weld was studied, and the welded joint with good appearance was obtained. When the heat input was greater than 105 J/mm, the penetration depth increased greatly , and the welding mode changed from laser thermal conductivity welding to laser keyhole penetration welding. When the laser power was 1800 W and the welding speed was 13 mm/s, the maximum depth to width ratio was 2.51.The distribution and evolution of the composition and structure of welded joints and interfaces were analyzed, and the relationship between the microstructure and mechanical properties was explored. It is found that the flow of molten pool is mainly annular, forming the component distribution of zinc content in the weld center is higher than that in the weld edge. It was suggested that the non-uniformity of the composition caused by molten pool flow and component segregation was the main reason for the non-uniformity of the joint properties. The hardness test at the weld center showed that there was a large hardness gradient near the interface of the two materials, and higher heat input could promote the mixing of two materials and reduce the difference of mechanical properties of two materials at the interface.
激光焊黄铜紫铜微观组织工艺参数
laser weldingbrasscoppermicrostructureprocess parameter
高振永. 紫铜/黄铜焊接接头微观组织及力学性能研究［D］.黑龙江：哈尔滨工业大学，2009.
GAO Z Y. Microstructure and mechanical property of welded joints of copper/brass［D］. Heilongjiang：Haebin Institute of Technology， 2009.
张昌青，秦卓，荣琛，等. H62黄铜超薄板微搅拌摩擦焊接热机特征与接头组织性能研究［J］. 机械工程学报，2020，56（12）：65-72.
ZHANG C Q， QIN Z， RONG C， et al. Thermo-mechanical Characteristics and Microstructure and Properties of Micro-stir Friction Welding of H62 Brass Ultrathin Plate［J］. Journal of Mechanical Engineering， 2020，56（12）：65-72.
宫文彪，毛亚芬，张秋征，等. H62黄铜搅拌摩擦焊接头微观结构及性能［J］. 焊接学报，2014，35（02）：83-86+117.
GONG W B， MAO Y F， ZHANG Q Z， et al. Microstructure and property of H62 brass joints obtained by friction stir welding［J］. Transactions of the China Welding Institution， 2014，35（02）：83-86+117.
Huang G， Feng X， Shen Y， et al. Friction stir brazing of 6061 aluminum alloy and H62 brass： Evaluation of microstructure， mechanical and fracture behavior［J］. Materials & Design， 2016， 99： 403-411.
Sadeghi B， Ebrahimzadeh I， Gharavi F， et al. Effect of Welding Heat Input on the Microstructure and Mechanical Properties of Dissimilar Friction Stir-Welded Copper/Brass Lap Joint［J］. Materials Research， 2019， 22（4）：e20180599.
刘文东，李红. 黄铜与不锈钢异种金属激光焊接工艺研究［J］.应用激光，2019，39（06）：966-969.
LIU W D， LI H. Research on Laser Welding Process of Dissimilar Metal with Brass-stainless Steel［J］. Applied Laser， 2019，39（06）：966-969.
Yan L， Jam J E， Beni M H， et al. Effect of laser welding parameters on the temperature distribution， microstructure and mechanical properties of dissimilar weld joint of Inconel 625 and stainless steel 304［J］. International Communications in Heat and Mass Transfer， 2022， 131： 105859.
Zhou L， Luo L Y， Tan C W， et al. Effect of welding speed on microstructural evolution and mechanical properties of laser welded-brazed Al/brass dissimilar joints［J］. Optics & Laser Technology， 2018， 98： 234-246.
Zhou L， Li Z Y， Song X G， et al. Influence of laser offset on laser welding-brazing of Al/brass dissimilar alloys［J］. Journal of Alloys and Compounds， 2017， 717： 78-92.
Hugger F， Hofmann K， Stein S， et al. Laser beam welding of brass［J］. Physics Procedia， 2014， 56： 576-581.
皮友东. 黄铜与紫铜及黄铜与低碳钢异种金属的激光焊接［D］. 北京：北京工业大学，2007.
PI Y D. Laser Welding on Dissimilar Metals of Brass/Copper and Brass/Low-Carbon-Steel［D］.Beijing：Beijing University of Technology，2007.
Dong P， Xiao R. Laser welding of lap joint between copper and brass［C］//International Congress on Applications of Lasers & Electro-Optics. Laser Institute of America， 2009， 2009（1）： 203-207.
刘雁清，蒋京刚，何培，等. 一种黄铜与紫铜的激光焊接方法：CN113714644A［P］. 2021-11-30．
Yang H，Tang X，Hu C，et al. Study on laser welding of copper material by hybrid light source of blue diode laser and fiber laser［J］. Journal of Laser Applications，2021，33（3）：032018．
Yu B L，Dai J，Yang L，et al. Effect of Powder Interlayer on Copper Alloy Lap Joint by Laser Welding［J］. Transactions of the Indian Institute of Metals， 2020， 73（10）：2577-2585.
Zhang L J， Zhang G F， Ning J， et al. Microstructure and properties of the laser butt welded 1.5 mm thick T2 copper joint achieved at high welding speed［J］. Materials & Design， 2015， 88：720-736.
编辑部网址：http：//www.71dhj.comhttp://www.71dhj.com
相关作者
相关机构
公网安备11010802024621