摘要
在Cr12模具钢材料表面上,分别进行了PHNi-60A、PHNi25WC-60A和Stellite6三种合金粉末的激光熔覆实验,并对实验结果进行分析。结果表明:Cr12模具钢表面上可实现镍基合金和钴基合金的激光熔覆,可获得较好的冶金界面结合;激光熔覆后表面的耐磨损性能比熔覆前的基体耐磨损性能有较大的提高;表面硬度在不同程度上都得到提高,硬度峰值出现在次表层,其最大值为1049HV0.2;微观结构是由平面晶和枝晶构成的共晶组织,并有多种合金相分布在枝晶间。
The cladding layer on surface of Crl2 die steel was prepared by laser cladding using PHNi-60A, PHNi25WC-60A and Stellite6 alloy powders as cladding materials, respectively. Mierostructure and properties of the cladding layers were examined by means of hardness test, wear test, SEM and XRD. The results show that metallurgy binding interface between the nickel-base alloy, cobalt-base alloy and Crl2 steel is obtained. Wear-resistance and hardness of the clad Crl2 steel are obviously improved. The maximum hardness is 1049HV0.2 at subsurface of the clad layer. The eutectic and dendrite microstructure with metallic and WC particles distributing in the inter-dendrites is observed for the cladding layers.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2009年第1期161-165,共5页
Transactions of Materials and Heat Treatment
