阻隔缓释层对钛合金/不锈钢电子束焊接接头性能的影响  

Effect of Isolation Interlayer on Mechanical Property of Electron Beam Welding Joint of Titanium Alloy/Stainless Steel

作　　者：王亚荣[1] 余洋[1] 雷华东[1] WANG Yarong;YU Yang;LEI Huadong(Institute of Machinery Manufacturing Technology,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院机械制造工艺研究所,四川绵阳621900

出　　处：《热加工工艺》2022年第9期47-51,共5页Hot Working Technology

摘　　要：采用电子束熔化焊进行TC4钛合金与1Cr18Ni9Ti不锈钢异种金属之间的连接试验。结果表明:采用电子束直接熔化焊连接TC4钛合金和1Cr18Ni9Ti不锈钢时,接头界面会产生贯穿性裂纹,导致焊缝直接断裂。以T2铜箔作为阻隔缓释层,通过电子束偏移来控制金属的熔合比,可以减少了TC4/1Cr18Ni9Ti界面的金属间化合物的产生,同时增加界面塑性变形能力,降低了应力,实现了钛合金与不锈钢的冶金结合,接头抗拉强度最大值为256 MPa,可获得X射线探伤无裂纹和气孔缺陷的钛合金/不锈钢异种金属焊接接头。Electron beam welding was used for the connection of dissimilar metals of TC4 titanium alloy and 1Cr18Ni9Ti stainless steel. The results show that the penetrated crack is formed in the interface of electron beam welding joint without interlayer, which leads to cracking of the joint directly. Taking T2 copper foil as isolation interlayer, electron beam migration is used to control the fusion ratio of metals, which can reduce the production of intermetallic compounds at the TC4/1Cr18Ni9Ti interface, increase the plastic deformation ability of the interface, slow down the stress, and realize the metallurgical combination of titanium alloy and stainless steel. The maximum tensile strength of titanium alloy/stailess steel is up to 256 MPa. The joint without crack and porosity detected by X-ray inspection can be obtained by the electron beam isolation welding.

关 键 词：电子束焊接 钛合金 不锈钢 阻隔层 

分 类 号：TG456.3[金属学及工艺—焊接]