摘要
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 diffusion bonding technique based on the liquid phase sintering of Ti（C,N）-based cermets was introduced to joint Ti （C,N）-based cermets and steel. The effect of bonding temperature was studied, and the microstructure and chemical composition of the welded joint were investigated. The results indicate that the best bonding temperature of Ti（C,N）-based cermets and steel is 1320℃. Lower than 1320℃, it is difficult to densify the Ti （C,N）-based cermets, therefore, the joining of Ti（C,N）-based cermets and steel can not be achieved; higher than 1320℃, the steel melts. The diffusion bonding layer of Ti（C, N）-based cermets and steel is composed of four layers： the first layer is the surface layer ofTi （C,N）-based cermets, it contains much Ni and a certain amount of Ti; the second layer is also the surface layer of Ti （C,N）-based cermets, however, Ni decreases, Ti and Fe increase in this layer; the third layer is austenite layer, which consists of Ni and Fe; the fourth layer is martensite layer closing to the steel substrate, which consists of much Fe ,little Ni and C.
出处
《热加工工艺》
CSCD
北大核心
2015年第17期28-31,共4页
Hot Working Technology
基金
国家自然基金资助项目(51205263)
四川省科技支撑计划项目(2013GZX0146)
四川大学青年学者研究基金资助项目(2013SCU04A30)
