氩弧熔敷原位合成ZrC-TiB2增强铁基涂层的组织与性能  

Microstruture and Properties of ZrC-TiB2 Reninforced Fe-based Composite Coating In-situ Synthesed by Argon Arc Cladding

作　　者：陈鹏涛 曹梅青[1] 吕萧 仇楠楠[1] CHEN Pengtao;CAO Meiqing;LYU Xiao;QIU Nannan(School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao Shandong 266590, China)

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266590

出　　处：《上海金属》2020年第5期15-20,共6页Shanghai Metals

基　　金：山东省自然科学基金(ZR2018MEM008)。

摘　　要：为提高Q235低碳钢的耐磨性能,以Zr粉、Ti粉、B4C粉和Fe粉为原料,采用氩弧熔敷技术在Q235钢表面制备了ZrC-TiB2和ZrC-TiB2-ZrB2增强铁基复合涂层。利用光学显微镜(OM)、X射线衍射仪(XRD)、电子探针(EPMA)、能谱仪(EDS)、显微硬度计和摩擦磨损试验机对复合涂层的显微组织和性能进行分析。结果表明:在Q235钢表面成功制备出ZrC-TiB2和ZrC-TiB2-ZrB2两种复合涂层,涂层与基体呈现良好的冶金结合。当Zr∶Ti∶B4C的摩尔比为1∶2∶1时,熔敷层中的增强相主要为ZrC-TiB2;当Zr∶Ti∶B4C的摩尔比为2∶1∶1时,熔敷层中的增强相主要为ZrC-TiB2-ZrB2,增强相呈针状和块状分布于基体中。相比Q235钢基体,复合涂层的显微硬度明显提高,摩擦因数明显降低,磨损失重减小,具有优异的耐磨性能。Fe-based composite coating reinforced by ZrC-TiB2 and ZrC-TiB2-ZrB2 particles were produced on the Q235 steel by means of argon arc cladding technique with the powders of Zr、Ti、B4C and Fe.The microstructure and properties of the composite coating were analyzed by OM,XRD,EPMA,EDS,microhardness tester and friction wear testing machine.The results showed that the ZrC-TiB2 and ZrC-TiB2-ZrB2 composite coatings were successfully produced on the Q235 steel,and well metallurgically bonded to the substrate.The reinforced phase was mainly ZrC-TiB2 and ZrC-TiB2-ZrB2 when the molar ratio of Zr-to-Ti-to-B4C was 1-to-2-to-1 and 2-to-1-to-1 respectively,reinforced phase was distributed in the matrix in the shapes of needle and block.Compared with the matrix of Q235 steel,the microhardness of the composite coating was obviously increased,the friction coefficient was obviously reduced,and the weight loss was reduced,so the composite coatings had excellent wear resistance.

关 键 词：氩弧熔敷 原位合成 ZrC-TiB2ZrC-TiB2-ZrB2耐磨性 

分 类 号：TG1[金属学及工艺—金属学]