T2紫铜/304不锈钢激光钎焊接头组织及性能  

Microstructure and properties of T2 copper/304 stainless steel laser brazed joint

作　　者：卢贵鹏 尹洪泽 刘威[1] Lu Guipeng;Yin Hongze;Liu Wei(Changchun University of Technology,Changchun 130012,China)

机构地区：[1]长春工业大学,长春130012

出　　处：《焊接》2020年第12期16-19,62,共5页Welding & Joining

基　　金：吉林省发改委产业技术与研究专项(2019C046-7);长春市科技创新“双十工程”项目(17SS024)。

摘　　要：采用铜锰镍钎料,使用激光焊机对T2紫铜和304不锈钢进行了激光钎焊。通过扫描电子显微镜、拉伸试验机测试分析了搭接形式下的钎缝宏观形貌、焊接接头力学性能及钎料元素的扩散情况。结果表明,在紫铜/不锈钢的激光钎焊时,焊接电流对钎缝成形的影响最大、脉冲频率次之、脉冲宽度的影响最小,对应的正交试验极差分别为17.35,15.66,7.91;钎料与母材发生良好的扩散并形成固溶体;钎缝中Fe,Cr元素扩散明显并存在条块状铜基固溶体,在最优的焊接工艺参数下,钎焊接头的抗剪强度达到35.75 MPa。Laser welder was used to weld T2 copper and 304 stainless steel with Cu-Mn-Ni brazing filler metal.Macroscopic morphology of brazed seam,mechanical properties of brazed joints and element diffusion of brazing filler metal were tested and analyzed by scanning electron microscope and tensile testing machine.The results showed that the influence of welding current on formation of brazed seam was the largest,the pulse frequency was second,and the pulse width was the least in laser brazing copper/stainless steel.The corresponding orthogonal test range were 17.35,15.66 and 7.91,respectively.Good diffusion and solid solution were formed between the brazing filler metal and the base metal.Fe and Cr elements in the weld bead diffused obviously and there existed granular copper-based solid solutions.Under the optimal brazing parameters,shear strength of brazed joints reached 35.75 MPa.

关 键 词：激光钎焊 钎缝成形 组织 力学性能 

分 类 号：TG454[金属学及工艺—焊接]