织构化对等离子束沉积钴基耐磨合金涂层组织及性能的影响  

Effect of texturing on microstructure and properties of Co-based wear-resistant alloy coatings deposited by plasma-beam

作　　者：宋享霖 向军淮[1] 黄齐文 娄瑾[1] 严凯 但江荣 侯鹏飞 肖伯涛[1] SONG Xiang-lin;XIANG Jun-huai;HUANG Qi-wen;LOU Jin;YAN Kai;DAN Jiang-rong;HOU Peng-fei;XIAO Bo-tao(Jiangxi Key Laboratory of Surface Engineering,Jiangxi Science and Technology Normal University,Nanchang 330013,China;Wuhan Huacai Surface Technology Co Ltd,Wuhan 430074,China)

机构地区：[1]江西科技师范大学江西省材料表面工程重点实验室,江西南昌330013 [2]武汉华材表面科技有限公司,湖北武汉430074

出　　处：《材料热处理学报》2023年第12期110-117,共8页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51865014);材料成形与模具技术国家重点实验室开放课题研究基金(P2019-012)。

摘　　要：为了抑制等离子束合金修复涂层的开裂倾向,在球墨铸铁板上制备了织构化钴基耐磨合金涂层,并分析了织构化对等离子束沉积钴基耐磨合金涂层组织及高温摩擦磨损性能的影响。结果表明:钴基耐磨合金涂层的组织为典型的亚共晶白口铸铁组织;钴元素含量为16.41 mass%的合金涂层经4次640℃回火保温1 h处理后,硬度保持在550~600 HV0.2,表明其具有较高的热稳定性,适宜作热轧辊表面修复涂层材料;点状织构化处理能够有效地抑制合金涂层的开裂倾向,涂层的表面及截面均未观察到裂纹存在,在700℃进行1 h的高温摩擦磨损后,平均摩擦系数较低,为0.27,磨损机理为粘着磨损与氧化磨损。In order to inhibit the cracking tendency of plasma beam alloy repair coatings,textured Co-based wear-resistant alloy coatings were prepared on ductile iron plates surface,and the effects of texturing on microstructure and high-temperature friction and wear properties of Co-based wear-resistant alloy coatings deposited by plasma-beam were analyzed.The results show that the microstructure of the Co-based wear-resistant alloy coatings is a typical hypoeutectic white cast iron structure.The hardness of the alloy coating with cobalt element content of 16.41 mass%is 550-600 HV0.2 after 4 times of tempering at 640℃for 1 h,indicating that it has high thermal stability and is suitable as a coating material for surface repair of hot rolling rolls.The point like texture treatment can effectively inhibit the cracking tendency of the alloy coating,and no cracks are observed on the surface and cross-section of the coating.After hightemperature friction and wear at 700℃for 1 h,the average friction coefficient is low,which is 0.27,and the wear mechanism is adhesive wear and oxidation wear.

关 键 词：钴基耐磨合金涂层 织构化 等离子束 

分 类 号：TG174.44[金属学及工艺—金属表面处理]