不锈钢/有色金属异质接头对于先进机械和传统体系设计的前沿研究具有十分重要的意义。本文作者对钛基和铁基两种异质合金进行焊接以提高异质接头的力学性能。在粘接压力范围为1~9 MPa(步长为2 MPa)、750°C和60 min条件下进行焊接获得异质接头。同时比较了采用不同机制和方法得到的钛基和铁基异质接头的力学性能。结果表明,扩散焊接钛、铁基异质金属接头的力学性能得到明显改善。异质金属接头优异的力学性能主要是由于在扩散区产生了能避免脆性Fe-Ti基金属间化合物形成的厚度约为200μm的Ni金属第三相。所得异质接头的最大抗拉强度为560 MPa,伸长率约为11.9%,这是至今为止文献所报道的最佳值。当焊接压力不低于5 MPa时,异质接头显示出加工硬化效应。异质接头中钛基有色金属的膨胀率远高于黑色金属(不锈钢)的膨胀率。采用SEM技术研究反应区的详细情况,并用XRD验证SEM的结果。分析异质接头的力学、物理和断裂性能随焊接参数变化的原因。 Stainless steel / non-ferrous metal heterogeneous joints for cutting-edge advanced machinery and traditional system design is of great significance. The author of titanium and iron-based two kinds of heterogeneous welding alloys to improve the mechanical properties of heterogeneous joints. Heterogeneous joints were obtained by welding at bond pressure range of 1 to 9 MPa (2 MPa in steps) at 750 ° C and 60 min. The mechanical properties of Ti-based and Fe-based heterogeneous joints obtained by different mechanisms and methods were also compared. The results show that the mechanical properties of diffusion welding titanium and iron-based heterogeneous metal joints have been significantly improved. The excellent mechanical properties of heterogeneous metal joints are mainly due to the creation of a third phase of Ni metal with a thickness of about 200 μm in the diffusion zone to prevent the formation of brittle Fe-Ti-based intermetallic compounds. The resulting heterojunction has a maximum tensile strength of 560 MPa and an elongation of about 11.9%, which is the best reported to date. When the welding pressure is not less than 5 MPa, the heterogeneous joints show work hardening effect. Heterogeneous joints in titanium-based non-ferrous metal expansion rate is much higher than the black metal (stainless steel) expansion rate. The details of the reaction zone were investigated by SEM and the results of the SEM were verified by XRD. The mechanical, physical and fracture properties of the heterogeneous joints are analyzed as a function of the welding parameters.