摘要
利用激光熔覆法在热处理后的T10A钢表面制备FeCrTiMoNiCo_x高熵涂层,然后利用X射线衍射仪和显微镜分析了熔覆层的组织和相结构,测试了试样处理后的截面硬度和表面耐磨性。结果表明,经激光熔覆技术得到的高熵合金层主要由Fe基固溶体及少量金属间化合物组成,Co含量对化合物组成有一定影响;熔覆层的组织由椭圆形胞状晶和柱状晶组成;熔覆层的硬度最高达到780 HV,比基体硬度高230 HV,磨损率下降了64%,磨损机制以磨粒磨损为主,兼有粘着磨损。
FeCrTiMoNiCox high entropy coating was prepared by laser cladding on the surface of heat-treated T10 steel. XRD and microscope were used to analyze the mierostrueture of the cladding layer and the substrate. The section hardness and surface wear resistance of the samples after treatment was measured. The results show that high entropy alloy coating prepared by laser cladding is mainly composed of iron based solution and a small amount of intermetallic compound. Co content has some effects on the composition of the compound. The microstructure of the cladding layer is elliptical after birth-like and columnar crystal. The highest hardness of the cladding layer is 780 HV, which is 230 HV higher than that of the substrate, and the wear rate decreases by 64%. The dominate wear meachnism is abrasive wear combined with adhensive wear.
出处
《热加工工艺》
CSCD
北大核心
2016年第20期143-145,148,共4页
Hot Working Technology
基金
上海市大学生创新实验项目资助项目(cz1405005)
关键词
激光熔覆
高熵合金涂层
显微硬度
磨损率
laser cladding
high entropy alloy coating
microhardness
wear rate
