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.
作者
杨家豪
潘成刚
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)
出处
《铸造技术》
CAS
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)
作者简介
杨家豪（1996-），湖北荆门人，本科生．研究方向：自蔓延涂层制备．电话：18771026937．E-mail：657800945@qq．com;通讯作者：潘成刚（1976-），湖北襄阳人，博士，副教授．研究方向：模具表面强化技术．电话：02768862234．E-mail：pcg2000@163．com
