基体的不同喷砂时间对激光熔覆钴基涂层性能的影响  

Influence of Different Sandblasting Time to Substrate on Performance of Laser Clad Cobalt-based Coatings

作　　者：马玉涛 胡艳娇 庞铭 MAYutao;HUYanjiao;PANGMing(College of Transportation Science and Engineering,Civil Aviation University of China,Tianjin 300300,China;College of Aeronautical Engineering,Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]中国民航大学交通科学与工程学院,天津300300 [2]中国民航大学航空工程学院,天津300300

出　　处：《热加工工艺》2025年第7期30-34,39,共6页Hot Working Technology

基　　金：国家自然科学基金项目(52076212)。

摘　　要：为提高0Cr17Ni12Mo2不锈钢的耐磨性,采用激光熔覆技术,在不同粗糙度的0Cr17Ni12Mo2不锈钢表面制备了钴基涂层。采用光学显微镜、扫描电镜、硬度仪和摩擦磨损试验机等探究了涂层的宏观形貌、微观组织、硬度和耐磨性能。结果表明:涂层与基体之间冶金结合良好,由于各区域传热与冷却结晶条件不同等综合因素的影响,涂层与基体交界处呈现波浪形;随喷砂时间增加,涂层的平均硬度值先升高后降低;当喷砂时间为1、2、3、4 min时,涂层的平均摩擦系数分别为0.387、0.301、0.423、0.383;随着喷砂时间的增加,涂层的磨损量先降低后增加,涂层的耐磨性得到增强。In order to improve the wear resistance of 0Cr17Ni12Mo2 stainless steel,the cobalt-based coatings were prepared on the surface of 0Cr17Ni12Mo2 stainless steel with different roughness using laser melting technology.The macroscopic morphologies,microstructure,hardness and wear resistance of the coatings were investigated using optical microscopy,scanning electron microscopy,hardness tester and friction wear testing machine.The results show that a metallurgical bond is formed between the coating and the matrix,and the junction between the coating and the substrate has a wavy shape due to a combination of factors such as different heat transfer and cooling crystallization conditions in each region.With the sandblasting time increasing,the average hardness value of the coating first increases and then decreases;when the sandblasting time is 1 min,2 min,3 min,4 min,the average friction coefficient of the coating is 0.387,0.301,0.423 and 0.383 respectively,with the increase of the sandblasting time,the wear of the coating first decreases and then increases,and the wear resistance of the coating is enhanced.

关 键 词：激光熔覆 喷砂 钴基涂层 耐磨性能 

分 类 号：TG174.4[金属学及工艺—金属表面处理]