Microstructure and properties of Fe-based coatings on cutting pick surface formed by plasma jet surface metallurgy  

作　　者：陈颢 羊建高 李惠琪 

机构地区：[1]School of Materials and Chemical Engineering,Jiangxi University of Science and Technology [2]Engineering Research Center of High-efficiency Development and Application Technology of Tungsten Resources of Ministry of Education [3]School of Materials Science,Shandong University of Science and Technology

出　　处：《中国有色金属学会会刊：英文版》2009年第S3期583-586,共4页Transactions of Nonferrous Metals Society of China

基　　金：Project(50801032) supported by the National Natural Science Foundation of China;Project(2008GQC0027) supported by the Natural Science Foundation of Jiangxi Province, China;Project(GJJ08270) supported by the Foundation of Education Office of Jiangxi Province, China

摘　　要：The Fe-based composite coatings were produced on the attrition spot of cutting pick by plasma jet surface metallurgy, and metallurgical bonding was obtained between coating and substrate. The results show that the microstructure, microhardness, wear resistance and erode resistance of the coating are all evaluated. The coating has apparent characteristics of rapid and layered crystallization from planar crystal-cell/dendritic transition zone on the interface, to equiaxed crystal on the midst, to spike crystal on the surface. The microhardness gradually increases from the bottom to the top of the coating. The composite coating has better wear resistance and erode resistance compared to steel substrate.The Fe-based composite coatings were produced on the attrition spot of cutting pick by plasma jet surface metallurgy, and metallurgical bonding was obtained between coating and substrate. The results show that the microstructure, microhardness, wear resistance and erode resistance of the coating are all evaluated. The coating has apparent characteristics of rapid and layered crystallization from planar crystal-cell/dendritic transition zone on the interface, to equiaxed crystal on the midst, to spike crystal on the surface. The microhardness gradually increases from the bottom to the top of the coating. The composite coating has better wear resistance and erode resistance compared to steel substrate.

关 键 词：CUTTING PICK plasma jet SURFACE METALLURGY microstructure wear RESISTANCE ERODE RESISTANCE 

分 类 号：TG174.4[金属学及工艺—金属表面处理]