Heat Treatment of Metals ›› 2021, Vol. 46 ›› Issue (2): 185-189.DOI: 10.13251/j.issn.0254-6051.2021.02.034

• SURFACE ENGINEERING • Previous Articles     Next Articles

Microstructure and properties of laser clad stainless steel layer on surface of low carbon steel

Wang Ge1, Fu Yuzhu1, Yao Quantong1,2, Tong Weiping1   

  1. 1. School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning 110819, China;
    2. Qingdao Institute of Bioenergy and Process, Chinese Academy of Sciences, Qingdao Shandong 266101, China
  • Received:2020-07-22 Online:2021-02-25 Published:2021-05-08

Abstract: The 316L stainless steel powder was cladded on the surface of 0.20%C low carbon steel by JHM-1GY-400 pulse Nb∶YAG laser. The phase composition and microstructure of the 316L clad layer were analyzed by OM, XRD and SEM. The wear resistance and corrosion resistance of the 316L clad layer and the substrate (0.20%C low carbon steel) were studied by rotary friction tester and electrochemical workstation. The results show that the clad layer is about 50 μm thick and is composed of γ phase(austenite) and α phase(ferrite). The microstructure of the clad layer mainly includes fine dendrites, coarse cellular crystals and planar front. The surface hardness of the clad layer is about twice of that of the substrate, while the friction coefficient is 0.0418 lower than that of the substrate, and the wear loss is lower, indicating that the stainless steel clad layer has a higher wear resistance than that of the substrate. Compared with the substrate, the clad layer has lower self-corrosion current and higher self-corrosion potential, indicating that the corrosion resistance of the stainless steel clad layer is better.

Key words: laser cladding, 316L stainless steel, low carbon steel, microstructure, wear resistance, corrosion resistance

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