光学精密工程2013，Vol.21Issue(8)：2048-2055,8.DOI:10.3788/OPE.20132108.2048
模具钢表面Co/TiC熔覆层的组织与高温磨损性能
Microstructures and high-temperature wear behaviors of Co/TiC laser coatings on die steel
摘要
Abstract
Co50 alloy coating and Co50 composite coatings doped with different mass fractiones of TiC were prepared by a 6 kW transverse-flow CO2 laser to improve the wear resistance of H13 die steel.The bonding characteristics,phase composition and wear behaviors of the coatings were investigated by X-ray diffractometry (XRD),Scanning Electron Microscopy (SEM) and high-temperature wear tester.The experimental results indicate that Co/TiC composite coatings with the content of TiC less than 20％ (weight percentage) show good metallurgical bonding characteristics with the substrate surface.In addition,the micro-hardness of TiC/Co based coatings increases with the TiC content,but matrix phase composition of the composite coatings tends to be simple:Co+ 10％TiC coating consists of TiCo3,Cr2Ni3 and Cr-Ni-Fe-C phases,while Co+20％TiC coating is Cr2Ni3 and γ-Co,and Co+30％TiC coating mainly is composed of γ-Co solid solution.Co+20％TiC coating shows better wear behavior than Co50 coating,as well as has a more stable friction coefficient.Moreover,the high-temperature wear is mainly caused by oxidation wear and fatigue wear.These results demonstrate that Co +20％TiC composite coating has good comprehensive properties.关键词
激光熔覆/模具钢/Co/TiC复合涂层/高温磨损Key words
laser cladding/die steel/Co/TiC composite coating/high-temperature wear分类
矿业与冶金引用本文复制引用
PHAM THI HONGNGA,刘洪喜,张晓伟,王传琦,蒋业华..模具钢表面Co/TiC熔覆层的组织与高温磨损性能[J].光学精密工程,2013,21(8):2048-2055,8.基金项目
昆明理工大学分析测试基金资助项目(No.2010025 （）
No.2011008) （）
