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介绍了一种基于液相烧结过程的Ti(C,N)基金属陶瓷/钢的扩散连接方法。试验研究了连接温度的影响,并对接头界面微观组织与成分进行了分析。结果表明,Ti(C,N)基金属陶瓷/钢的最佳连接温度是1320℃。低于1320℃时,Ti(C,N)基金属陶瓷无法致密化,Ti(C,N)基金属陶瓷和钢无法连接;高于1320℃时,钢熔化。Ti(C,N)基金属陶瓷/钢的扩散连接过渡层由四部分构成:靠近Ti(C,N)基金属陶瓷的过渡层Ni含量极多,有一定量的Ti,是Ti(C,N)基金属陶瓷的表面层;第二层Ni含量减少,Ti和Fe增加,也是Ti(C,N)基金属陶瓷的表面层;第三层是奥氏体区,主要元素是Ni和Fe;第四层是马氏体区,它靠近钢基体,主要成分是Fe及少量Ni和C。
A Ti (C, N) -based cermet / steel diffusion bonding method based on liquid-phase sintering process is introduced. The influence of the connection temperature was experimentally studied, and the microstructure and composition of the joint interface were analyzed. The results show that the optimum joining temperature of Ti (C, N) -based cermets / steels is 1320 ℃. Below 1320 ℃, the Ti (C, N) -based cermets can not be densified and the Ti (C, N) -based cermets and steel can not be connected; when above 1320 ℃, the steel melts. The transitional layer of Ti (C, N) -based cermet / steel diffusion junction is composed of four parts: the transitional layer close to Ti (C, N) -based cermets has a very high content of Ni and a certain amount of Ti is Ti (C, N ) Base metal ceramic surface layer; the second layer of Ni content decreases, Ti and Fe increase, but also Ti (C, N) -based cermets surface layer; the third layer is austenite region, the main elements are Ni and Fe; The fourth layer is the martensite region, which is close to the steel substrate, the main component is Fe and a small amount of Ni and C.