Transactions of Materials and Heat Treatment

Title：Microstructure and tribological properties on wear resistant steel prepared by wire+arc additive manufacturing

Authors： Hu Ruizhang1 Guo Chun1 Ying Meng1 Wu Suisong2

Unit： 1.Anhui Science and Technology University 2.Anhui Polytechnic University

KeyWords： wear resistant steel wire+arc additive manufacturing microstructure tribological properties mechanical properties

ClassificationCode：TG146

year,vol(issue):pagenumber：2023,48(2):194-202

Abstract：

Microstructure, mechanical properties and tribological properties of wear resistant steel prepared by wire+arc additive manufacturing (WAAM) were studied. The results show that the appearance of the wear resistant steel sample prepared by WAAM is of good quality,and no defects such as pores and cracks are found. The inside of sample is a good metallurgical bond, and the metallographic structure is mainly martensite. TEM results show that its crystal structure is martensite, and there are carbides, inclusions and dislocations in the sample. The cross-sectional microhardness distributions of the sample in the longitudinal and transverse directions have large fluctuations, and the average microhardness values of the cross-section in the longitudinal and transverse directions are 601 and 597 HV0.5 respectively. The tensile yield strength of the sample at room temperature is 1112 MPa, and the tensile strength is 1259 MPa, and the average Charpy impact value is 4.2 J at room temperature. The wear rate of the wear resistant steel sample prepared by WAAM is about 10-6-10-5 mm3·(N·m)-1 magnitude in the condition of 5-25 N friction and wear test, and the friction coefficient is 0.24-0.69, which has excellent wear resistance properties.

Funds：

装备预研项目（61409230612）；安徽省高校优秀拔尖人才项目（gxbjZD2022046）；安徽省高校科学研究项目（YJS20210558）；安徽省高校协同创新项目（GXXT-2019-022）；安徽科技学院学术和技术带头人后备人选项目（202101）；安徽省自然科学基金资助项目(1908085QE174)；安徽科技学院人才项目(RCYJ201905)

作者简介：胡瑞章（1983-），女，学士，实验师，E-mail：hurzh@ahstu.edu.cn；通信作者：郭纯（1984-），男，博士，教授，E-mail：guochun@ahstu.edu.cn

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