Microstructure and properties of Fe-based coatings on cutting pick surface formed by plasma jet surface metallurgy
(1. School of Materials and Chemical Engineering, Jiangxi University of Science and Technology,
Ganzhou 341000, China;
2. Engineering Research Center of High-efficiency Development and Application
Technology of Tungsten Resources of Ministry of Education, Ganzhou 341000, China;
3. School of Materials Science, Shandong University of Science and Technology, Qingdao 266510, China)
Ganzhou 341000, China;
2. Engineering Research Center of High-efficiency Development and Application
Technology of Tungsten Resources of Ministry of Education, Ganzhou 341000, China;
3. School of Materials Science, Shandong University of Science and Technology, Qingdao 266510, China)
Abstract: 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.
Key words: cutting pick; plasma jet surface metallurgy; microstructure; wear resistance; erode resistance