高频感应辅助SHS制备TiC基平面复合涂层工艺研究  

TiC-based Flat Composite Coating by High-frequency Assisted SHS Technology

作　　者：杨家豪 潘成刚[1,2] 蔡文菁 张伟喆 周宛晴 刘笃笃 YANG Jiahao;PAN Chenggang;CAI Wenjing;ZHANG Weizhe;ZHOU Wanqing;LIU Dudu(The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China;School of Materials and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]武汉科技大学材料与冶金学院,湖北武汉430081

出　　处：《铸造技术》2018年第9期1948-1954,共7页Foundry Technology

基　　金：国家自然科学基金资助项目(51375353);大学生科技创新基金资助项目(17ZRA004)

摘　　要：采用高频感应辅助SHS技术在5CrNiMo钢基体上制备了TiC基平面复合涂层,分析了加热电流、保压时间、金属粘结相对涂层的微观组织的影响。结果表明,随着加热电流增大,涂层内部的孔洞数量增多且尺寸也逐渐变大,Ni和TiC相分布也越来越均匀,试验最佳的加热电流为600A。随着保压时间的延长,涂层的孔洞数量逐渐减少,而且孔洞的尺寸也渐渐变小,试验最佳保压时间为40s。Ti-C-Ni体系的绝热温度高于Ti-C-Fe体系200K左右,Ti-C-Ni体系的界面结合良好,涂层孔洞少。试验最佳体系为Ti-C-Ni。TiC-based composite flat coatings on 5CrNiMo steel surface were prepared by high-frequency assisted self-propagating high temperature synthesis technology. The effects of different process parameters （heating current, pressure holding time and metal bonding phase） on the microstructure of the coatings were analyzed. The results show that the number and size of pores in the coating increase gradually with the increase of the heating current. The distribution of Ni and TiC is more and more uniform, and the optimum heating current is 600 A. As the pressure holding time lengthening, the number and size of pores in the coating gradually decreases, and the best pressure holding time of the test is 40 s. The adiabatic temperature of Ti-C-Ni system is about 200 K higher than that of Ti-C-Fe system. The interracial bonding of Ti-C-Ni system is good. and the pores in the coating are few. The best test system is Ti-C-Ni.

关 键 词：SHS TiC基 高频感应 平面涂层 

分 类 号：TG174[金属学及工艺—金属表面处理]