Transactions of Materials and Heat Treatment

Title：Preparation and wear resistance analysis of surfacing coating for cobalt-based WC

Authors： Zhou Yanxia Hong Feng Wang Huajun Li Ainong

Unit： 1.Department of Mechanical and Electrical Engineering Hubei Water Resources Technical College 2.Hubei Key Laboratory of Advanced Technology for Automotive Components Wuhan University of Technology 3. Hubei Collaborative Innovation Center for Automotive Components Technology Wuhan University of Technology 4.School of Materials Science and Engineering Wuhan University of Technology

KeyWords： hot forging die surfacing WC wear cobalt-based

ClassificationCode：TG316

year,vol(issue):pagenumber：2019,44(10):152-156

Abstract：

In order to explore the influence of cobalt-based WC coating on the life of hot forging dies, WC reinforced cobalt-based surfacing coatings were prepared on the surface of base materjal for H13 hot forging die steel by powder plasma surfacing. According to the content of reinforced WC, four kinds of formulas were designed, and the corresponding surfacing coatings were prepared. Then, the surfacing coating morphology and structures were observed and analyzed by optical microscopy and scanning electron microscopy, and the chemical compositions were analyzed by EDS. Furthermore, the microhardness and wear performance of surfacing coating were tested for different contents of WC, and the influence of WC contents on the surfacing coating performance was explored. The results show that WC reinforced cobalt-based surfacing coatings and the matrix metallurgical combination is well, and the hardness of surfacing coating is improved greatly compared to that of H13 steel matrix. Thus, the surfacing coating with WC content of 30% gets the best wear resistance performance which is 10 times wear resistance than that of the matrix.

Funds：

国家自然科学基金资助项目 (51475346)

作者简介：周艳霞（1981-），女，硕士，讲师 E-mail：247441860@qq.com 通讯作者：洪峰（1981-），男，硕士，讲师 E-mail：hongf@whut.edu.cn

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