紫铜与不锈钢真空钎焊组织与力学性能  

Microstructure and mechanical properties of copper and stainless steel joint by vacuum brazing

作　　者：魏松 张亚霄 周晓蕾 曾如川 宋炜 Wei Song;Zhang Yaxiao;Zhou Xiaolei;Zeng Ruchuan;Song Wei(Beijing Satellite Manufacturing Co.,Ltd.,Beijing 100094,China;Beijing Engineering Research Center of Welding Technology and Equipment for Spacecrafts,Beijing 100094,China;Beijing Engineering Research Center of Smart Mechanical Innovation Design Service,Beijing 100094,China;Beijing Union University,Beijing 100094,China;Inner Mongolia Pingzhuang Coal Industry(Group)Co.,Ltd.,Chifeng 024076,Inner Mongolia,China)

机构地区：[1]北京卫星制造厂有限公司,北京100094 [2]北京市航天器焊接技术与装备工程技术研究中心,北京100094 [3]北京市智能机械创新设计服务工程技术研究中心,北京100101 [4]北京联合大学,北京100101 [5]内蒙古平庄煤业(集团)有限责任公司,内蒙古赤峰024076

出　　处：《焊接》2020年第3期54-57,I0018,共5页Welding & Joining

基　　金：北京市教委科研计划项目(KM202011417004)。

摘　　要：为解决T2铜与316L不锈钢的焊接问题,采用丝状和膏状两种样式的BAg72Cu钎料,焊前对焊件进行化学清洗,去除表面氧化膜,对316L不锈钢表面进行了化学镀镍处理,以促进钎料的润湿与铺展。进行了真空钎焊试验,并通过金相观察和剪切试验进行钎焊接头的界面状态和力学性能测试。结果表明,在焊接温度820℃,保温10 min参数下能得到良好的T2铜/316L不锈钢钎焊接头,抗剪强度在70 MPa以上。最后利用该工艺参数完成了模拟件的焊接,经氦质谱检漏,漏率优于1×10-9Pa/(m3·s),满足产品使用要求。In order to solve the welding problem between T2 copper and 316L stainless steel,two types of BAg72Cu solders(filamentary and paste solders)were used in the vacuum brazing.Before experiment,copper and stainless steel were chemically cleaned in order to remove the oxide film on the surface of the material,and then nickel was plated on the surface of 316L stainless steel in order to promote the wetting and spreading of the brazing filler metal.After experiment,the performance of the joint was checked by metallographic examination and shear test.Through a series of brazing process tests,the optimum process specification was obtained.The brazed joints of T2 copper and 316L stainless steel with shear strength above 70 MPa could be obtained at 820℃and holding time of 10 min.Finally,the welding of the simulator was completed with the process parameters.The leak rate was better than 1×10-9 Pa/(m 3·s)after leak detection by helium mass spectrometry,which met the requirements of the product.

关 键 词：铜与不锈钢 BAg72Cu 真空钎焊 

分 类 号：TG454[金属学及工艺—焊接]