热处理对激光熔覆钴基合金涂层硬度与耐磨性的影响  

Effect of heat treatment on hardness and wear resistance of laser clad Co-based alloy coating

作　　者：杨栋杰[1] 白峭峰[2] 欧阳昌耀 王蕊 卫润泽 Yang Dongjie;Bai Qiaofeng;Ouyang Changyao;Wang Rui;Wei Runze(Department of Materials Engineering,Shanxi Institute of Mechanicle and Electricle Engineering,Changzhi Shanxi 046011,China;School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,China)

机构地区：[1]山西机电职业技术学院材料工程系,山西长治046011 [2]太原科技大学机械工程学院,山西太原030024

出　　处：《金属热处理》2023年第7期271-276,共6页Heat Treatment of Metals

基　　金：山西省重点研发计划(201903D121051)。

摘　　要：采用激光熔覆技术在球墨铸铁表面制备钴基合金涂层,对钴基合金涂层进行了不同工艺的热处理。对不同工艺热处理试样组织进行了分析,讨论了不同工艺对钴基合金涂层硬度和耐磨性的影响。热处理试样的硬度相较于未处理试样均得到了提高。其中950℃分别处理1和2 h的试样硬度变化相似,分别为51.35和51.15 HRC,再后续825℃时效后的硬度分别为52.50和52.08 HRC。未处理试样的磨损量最高,耐磨性表现最差;其中950℃×1 h+825℃×24 h磨损量减少约5.3%;950℃×3 h+825℃×24 h磨损量减少约12.8%,表现出较好的耐磨性能。Co-based alloy coating was prepared on the surface of ductile iron by laser cladding technology.Microstructure of the specimens under different heat treatment processes was analyzed and the effects of different processes on the hardness and wear resistance of the cobalt-based alloy coating were discussed.Compared with untreated specimens,the hardness of heat-treated specimens is improved.The hardness changes of the specimens treated at 950 ℃ for 1 h and 2 h,respectively,are similar,which are 51.35 HRC and 51.15 HRC,and that subsequent aged at 825 ℃ are 52.50 HRC and 52.08 HRC.The wear amount of the untreated specimen is the highest and the wear resistance is the worst.The wear loss of the specimen treated by 950 ℃×1 h + 825 ℃×24 h reduces by 5.3%,and that of the treated by 950 ℃×3 h+825 ℃×24 h reduces by 12.8%,which shows better wear resistance.

关 键 词：激光熔覆 钴基合金涂层 热处理 硬度 耐磨性 

分 类 号：TG174.4[金属学及工艺—金属表面处理] TG665[金属学及工艺—金属学]