摘要
采用氩弧熔覆工艺在Ｑ２３５ 基材上熔覆Ｎｉ３５Ｂ＋ Ｃｏ－ＷＣ，获得了具有较高硬度和耐磨性的熔覆层。分析了熔覆层的显微组织、硬度和耐磨性及物相形貌和相结构等，证明熔覆层的强化机制是：①形成细小的Ｍ６Ｃ型合金化合物网架；②高度弥散的粒状Ｍ６Ｃ型合金化合物颗粒和极细小的Ｃｒ２Ｎｉ３ Ｂ及ＷＣ颗粒的弥散强化；③Ｃ、Ｃｒ及Ｂ等合金元素溶入α－Ｆｅ（Ｍｅ）和γ－Ｎｉ（Ｍｅ）中产生的固溶强化。
A coating has been made on Q235 steel substrate by argon shielded arc cladding with Ni35B and cobalt WC powders. The coating possesses good quality with high hardness and wear resistance. The microstructural morphology and the phase structure were studied in detail. It is proved that the hardening mechanism of the coating is related to the formation of Fe 3W 3C Fe 4W 2C framework, the dispersion hardening of Fe 3W 3C Fe 4W 2C and Cr 2Ni 3B particles in the γ Ni (Me) matrix, the solution hardening of α Fe (Me) and the particle hardening by some residual undecomposed WC.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1999年第5期42-46,共5页
Journal of Iron and Steel Research
基金
吉林省科委工业发展基金
关键词
氩弧熔覆
显微组织
强化机制
氩弧焊接
argon shielded arc cladding,microstructure,strengthening mechanism
