316L不锈钢与紫铜磁脉冲焊接组织性能分析

Analysis of the micro-structure and properties of 316L stainless steel and copper magnetic pulse welding

为了得到316L不锈钢与紫铜磁脉冲焊接接头界面处结合方式、显微组织与性能,分别对常温和深冷处理后的磁脉冲焊接接头进行微观组织观测和力学性能测定.结果表明,316L不锈钢与紫铜经磁脉冲焊接后接头界面处产生了由应力波引起的亥尔姆霍兹失稳效应,界面处呈现波浪状,结合方式为冶金结合.经深冷处理后的焊接接头组织和性能与未处理前基本一致,深冷处理并不能使界面处组织和结合方式发生改变.磁脉冲焊接过程中,铜管变形以径向和周向变形为主,界面处为变形孪晶组织,不锈钢以径向变形为主,界面处为变形奥氏体组织.

In order to get the interface combination microstructure and properties of 316 L stainless steel and copper magnetic pulse welding joint,the micro-structure observation and mechanical properties of the magnetic pulse welding joint were respectively measured at room temperature and cryogenic treatment. The results showed that the interface of magnetic pulsewelding joint had destabilizing effects of Helmholtz caused by stress wave. The interface was wave and the combination method was metallurgical combination. The micro-structure and mechanical properties of welding joint after cryogenic treatment were basically same as the untreated. Cryogenic treatment didn't make changes at the interface of organization and combination. During the process of magnetic pulse welding,the deformation of copper tube was mainly in the radial and circumferential deformation,and the interface was deformed twins structure,and the stainless steel was deformed at radial direction,the interface was deformed austere structure.