摘要
采用氩弧熔覆工艺在Q235基材上熔覆Ni35BSiC,获得硬度和耐磨性高的熔覆层。显微组织、相组分形貌和相结构分析证明熔覆层强化机制是:γNi5Si2相弥散强化、γNi基体上共格析出γNi3Si强化和C、Cr、B固溶强化的共同作用。
A hard and wear resistant Ni35B\|SiC coating is formed on a Q235 steel substrate by argon shielded arc cladding. The structural morphology and the phase structure of the coating are studied experimentally. It is concluded out that the strengthening mechanism of the coating is composed of dispersion hardening of γ\|Ni\-5Si\-2, the coherent γ\|Ni\-3Si formation in the γ\|Ni(Me) matrix, and the solid solution hardening effect of C,Cr,B dissolved in γ\|Ni(Me).
基金
国家自然科学基金! (5 962 910 2 )
吉林省工业发展基金! (19980 10 1 0 8)资助
关键词
氩弧熔覆
显微组织
强化机制
熔覆层
argon shielded arc cladding,\ microstructure,\ strengthening mechanism,\ cladding
