Microstructure and Abrasive-wear Behavior Under High Temperature of Laser Clad Ni-based WC Ceramic Coating
The laser cladding is used on the surface of 4Cr14Ni14NW2Mo heat-resisting steel,In the laser cladding added 0.5% CeO2,Ni-based WC coating can be formed.The effects of rare-earth oxide CeO2 on the microstructure and microhardness and wear-resistance and corrosion-resistance of Ni-based metal-ceramic coatings are investigated.Observing and analying the microstructure,Measuring microhardness,Checking the dry friction and wear properties of high-temperature of the coating in different temperature.The results showed that the microstructure of Ni2 l+20%Wc+0.5%CeO2 cladding layer is even small,Hardness is more uniform and gentle.Wear mechanism of the laser cladding layer changes with temperature changes.Abrasion is the main mode under Low temperature,it was transformed into Adhesive wear and Oxidation wear along with the increase of the temperature.dry friction and wear properties of high-temperature is excellent.
laser cladding Ni-based Metal-ceramics layers abrasive-wear under high temperature Wear mechanism
Kuang Jian-xin Wang Xin-heng Liu An-min
Advanced Manufacturing Technology Research Institute,Hunan institute of Technology,Hengyang Hunan 421002,China
国际会议
广州
英文
891-895
2012-11-16（万方平台首次上网日期，不代表论文的发表时间）