Heat Treatment of Metals ›› 2023, Vol. 48 ›› Issue (12): 213-221.DOI: 10.13251/j.issn.0254-6051.2023.12.036

• MICROSTRUCTURE AND PROPERTIES • Previous Articles     Next Articles

Microstructure and properties of hard-phase reinforced wear-resistantlayer on 60Si2Mn steel for soil-engaging component deposited by laser cladding

Chen Denghua1,2,3, Yu Honghai4, Liu Haiding1,2,3, He Qubo1,2,3,5, Zhang Jieke5, Huang Haitang1,2,3, Gong Yuhao5   

  1. 1. Chongqing Materials Research Institute Co., Ltd., Chongqing 400707, China;
    2. Chongqing Key Laboratory of Corrosion Resistant Alloys, Chongqing 400707, China;
    3. National Instrument Functional Materials Engineering & Technology Research Center, Chongqing 400707, China;
    4. Guangzhou Bureau of Sea Decoration, Chongqing 400042, China;
    5. School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
  • Received:2023-08-03 Revised:2023-10-29 Online:2023-12-25 Published:2024-01-29

Abstract: High wear-resistant powder materials with 3 different chemical compositions (I, Ⅱ, Ⅲ) were designed and used to reinforce the surface of the 60Si2Mn ploughshare steel by laser cladding, then combined with quenching and tempering treatment to control the morphology and distribution characteristics of hard phases to improve the wear resistance of the working components. The results show that the as-quenched deposited metal mainly contains precipitated phases including VC carbide, Fe-rich and Cr-rich networked carbides, and Fe2O3 particles. After tempering at 500 ℃, the microstructure is dominated of tempered martensite and carbide, and the XRD phase analysis shows that the VC, MoC, Cr3C2 and other carbides exist in the deposited metal. The deposited metal with composition Ⅲ has the highest hardness value and the wear rate of tempered specimens is higher than that of the quenched, while the wear rate of deposited metal with composition Ⅱ is the lowest. The wear mechanisms for different deposited metals include abrasive wear and oxidation wear.

Key words: soil-engaging component, laser cladding, martensite, carbide, tempering, wear resistance

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