Cr12MoV钢表面激光熔覆稀土改性铁基复合涂层的性能  

Properties of rare earth modified Fe-based composite coating on Cr12MoV steel surface by laser cladding

作　　者：董晓传[1] 潘高峰[2] 李洋[1] 吴润谋 周正[2] 张晓艳 Dong Xiaochuan;Pan Gaofeng;Li Yang;Wu Runmou;Zhou Zheng;Zhang Xiaoyan(National-Local Joint Engineering Laboratory of Intelligent Manufacturing Oriented Automobile Die&Mould,Tianjin University of Technology&Education,Tianjin 300222,China;Tianjin Tianduan Press Co.,Ltd.,Tianjin 300402,China)

机构地区：[1]天津职业技术师范大学汽车模具智能制造技术国家地方联合工程实验室,天津300222 [2]天津市天锻压力机有限公司,天津300402

出　　处：《金属热处理》2022年第7期234-240,共7页Heat Treatment of Metals

基　　金：天津市教委科研计划(2021KJ027);天津市科技计划(20YDTPJC00310);天津职业技术师范大学科研发展基金(XJJB2102)。

摘　　要：采用激光熔覆技术在Cr12MoV钢表面制备CMC PMagic2L涂层,并通过添加稀土氧化物CeO_(2)构成改性铁基复合涂层,运用光学显微镜、扫描电镜、显微硬度计及摩擦磨损试验机等,研究了稀土氧化物CeO_(2)的加入对涂层组织性能的影响。结果表明,稀土氧化物CeO_(2)能够促进熔覆层晶粒细化,使热影响区宽度变大;CeO_(2)的含量越高,熔覆层硬度越大;含1%CeO_(2)的改性铁基复合涂层较未添加CeO_(2)的涂层,尽管热影响区厚度有所增加,但熔覆层平均硬度提高了22.1%,耐磨性也显著提高,磨损体积相对减小了43.66%,且熔覆层组织致密,有效地实现了模具表面强化的目的。CMC PMagic2L coating was prepared on the Cr12MoV steel surface by laser cladding technology,and the modified Fe-base composite coating was formed by adding rare earth oxide CeO_(2).The effect of adding rare earth oxide CeO_(2) on microstructure and properties of the coating was studied by means of optical microscope,scanning electron microscope,microhardness tester and friction and wear testing machine.The results show that CeO_(2) can improve the grain refinement of clad layer and enlarge the width of heat affected zone.The hardness of clad layer increases with the increase of CeO_(2) content.Compared with the coating without CeO_(2),although the thickness of the heat affected zone increases,but the average hardness of the clad layer in modified Fe-based composite coating with 1%CeO_(2) increases by 22.1%,the wear resistance is also significantly improved,and the wear volume is reduced by 43.66%.The clad layer has compact structure,which can effectively achieve the purpose of surface strengthening of the die.

关 键 词：激光表面强化 复合涂层 稀土氧化物CeO_(2) 铁基粉末 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]