不同Co含量对超音速火焰喷涂WC-xCo-3Cr涂层组织和性能的影响  

WC-xCo-3Cr Coating Micro-structure and Properties of HVOF High Velocity Oxy-fvel

作　　者：蒋浩[1] 朱协彬[1] 王刚[1] 

机构地区：[1]安徽工程大学再制造表面工程技术研究中心,安徽芜湖241000

出　　处：《安徽科技学院学报》2016年第2期65-70,共6页Journal of Anhui Science and Technology University

基　　金：安徽省教育厅高校自然科学研究重点项目(KJ2014A023)

摘　　要：通过超音速火焰喷涂工艺在Cr12模具钢表面上喷涂制备了WC-x Co-3Cr(x=8,10,12,14)涂层,并采用金相显微镜、扫描电镜、显微硬度仪和摩擦磨损试验机表征分析涂层的微观结构、显微硬度、耐磨损性能和耐腐蚀性,考察了不同Co含量对涂层组织和性能的影响。结果表明,Cr12模具钢超音速火焰喷涂后表面的耐磨损性能比喷涂前的基体耐磨损性能有较大的提高;表面硬度在不同程度上都得到提高,界面结合良好,其中WC-10Co-3Cr涂层的组织致密性最好、显微硬度最高、耐磨损及耐腐蚀性能最好。WC - xCo - 3 Cr （ x = 8,10,12, 14 ） coatings were prepared by HVOF （ high velocity oxy - fuel） process on Crl2 mold steel surface. Using metallographic microscope, scanning electron microscope, microhard- ness tester, and friction and wear testing machine characterization analysis of coating microstmcture, microhard- ness and wear resistance and corrosion resistance are investigated under the influence of different Co content on the microstructure and mechanical properties of the coating, the results show that the Crl2 steel surface wear resistance is higher than after the supersonic flame spraying spraying of matrix wear resistance of improve the quali- ty; Surface hardness is improved in different extent, combined with good interface, including WC -10Co -3Cr coating best tissue density and microhardness, wear resistance and corrosion resistance of the best.

关 键 词：CR12模具钢 超音速喷涂工艺 WC硬质合金涂层 涂层组织性能 

分 类 号：TG148[一般工业技术—材料科学与工程]