Quick Search:       Advanced Search
王涛,徐冲,路媛媛,张航,曹聪帅,林守刚,刘德健.同步送粉激光熔注制备WCp&H13钢复合材料层的微观组织和摩擦磨损性能[J].稀有金属材料与工程(英文),2019,48(5):1544~1550.[wangtao,xuchong,luyuanyuan,zhanghang,caocongshuai,linshougang and liudejian.Microstructure and Wear Resistance of Metal Matrix Composite Layer Fabricated by Simultaneous Powder-delivery Laser Melt Injection[J].Rare Metal Materials and Engineering,2019,48(5):1544~1550.]
Microstructure and Wear Resistance of Metal Matrix Composite Layer Fabricated by Simultaneous Powder-delivery Laser Melt Injection
Download Pdf  View/Add Comment  Download reader
Received:November 26, 2017  Revised:June 06, 2018
DOI:
Key words: laser melt injection  WC particle  microstructure  wear resistance
Foundation item:
Author NameAffiliation
wangtao,xuchong,luyuanyuan,zhanghang,caocongshuai,linshougang and liudejian  
Hits: 24
Download times: 8
Abstract:
      Casting WC particles (WCp) were used as reinforced particle, 4Cr5MoSiV1 steel particles were used as metal matrixs, and Laser Melt Injection (LMI) was employed to produce WCp/4Cr5MoSiV1 metal matrix composite on Q235 steel. Microstructure of MMC layer was analyzed by X-ray diffraction (XRD), Optical microscopy (OM) and scanning electron microscopy (SEM), microhardness was tested along the depth direction of the coatings, pin-on-disk wear test was conducted at room temperature, and morphologies of worn surfaces was analyzed by SEM. Results show that the compound layer mainly comprises γ-Fe, WC, M2C, M6C, M23C7, (Fe,W)3C (M=(Fe, Cr, W, Mo), carbides exhibit different forms in the composite layer. The hardness of the compound layer is 723.74HV0.2, which is 4.6 times of the substrate and 50% higher than traditional hardened 4Cr5MoSiV1 steel. The average friction coefficient of MMC layer is 0.283, which is only 87.1% of the cemented carbide and 61.1% of the 4Cr5MoSiV1 steel. The relative wear rate is 43.45, which is 1.7 times of the cemented carbide and 43 times of the 4Cr5MoSiV1 steel.