Microstructure and Tribological Performances of 25NiCr-Cr_3C_2 Coatings Prepared by Laser-Hybrid Plasma Spraying Technology

作     者：Li Shuqing1,2,Li Qilian2,Gong Shuili2 1Department of Materials Processing Engineering,School of Materials Science & Engineering,Dalian University of Technology,Dalian 116085,China 2National Key Laboratory of Science and Technology on Power Beam Processes,Beijing Aeronautical Manufacturing Technology Research Institute,Beijing 100024,China 

作者机构：Dalian Univ Technol Sch Mat Sci & Engn Dept Mat Proc Engn Dalian 116085 Peoples R China Beijing Aeronaut Mfg Technol Res Inst Natl Key Lab Sci & Technol Power Beam Proc Beijing 100024 Peoples R China 

出 版 物：《稀有金属材料与工程》 (Rare Metal Materials and Engineering)

年 卷 期：2011年第40卷第S4期

页      面：194-198页

核心收录：

学科分类：080503[工学-材料加工工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：laser hybrid plasma spraying 25NiCr-Cr3C2 coating performance 

摘      要：The 25NiCr-Cr3C2 coatings are deposited on 38CrMoAl substrate by air plasma spraying and laser-hybrid plasma spraying (LHPS) technologies,the coatings microstructures and tribological performances were studied using an optical microscope,a scanning electron microscope,an X-ray diffraction,and an SRV high-temperature friction and wear *** the same time,the coating s bonding strength,microhardness are tested and *** test results indicate that the LHPS 25NiCr-Cr3C2 coating achieves metallurgy bonding and has higher bonding strength and higher microhardness than the air plasma spraying coating for the addition of the laser *** laser power makes the 25NiCr-Cr3C2 powders melt more sufficiently and has good fluidity and uniformity and therefore the LHPS 25NiCr-Cr3C2 coating s microstructures become more compact and there are no big cracks and cavities in *** the above changes,the LHPS 25NiCr-Cr3C2 coating has more excellent anti-high temperature abrasion performance and its friction coefficient is low and very stable,its main failure mechanism is a good combination of mild scratching and plastic deformation.