Microstructure and wear property of laser cladded WC particles reinforced CoCrFeNiMo composite coatings on Cr 12 MoV steel  

Cr12MoV钢表面激光熔覆WC/CoCrFeNiMo复合涂层的显微组织与耐磨性能

作　　者：LIU Xing-yi YANG Xiao CHEN Zu-bin GUO Chun-huan LI Hai-xin YANG Zhen-lin DONG Tao JIANG Feng-chun QIAO Zhu-hui 刘兴毅;杨霄;陈祖斌;果春焕;李海新;杨振林;董涛;姜风春;乔竹辉(Yantai Research Institute,Harbin Engineering University,Yantai 264006,China;College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing,Yantai 264006,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China)

机构地区：[1]Yantai Research Institute,Harbin Engineering University,Yantai 264006,China [2]College of Materials Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China [3]Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing,Yantai 264006,China [4]State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China

出　　处：《Journal of Central South University》2025年第1期49-70,共22页中南大学学报(英文版)

基　　金：Project(2021YFC2801904)supported by the National Key R&D Program of China;Project(KY10100230067)supported by the Basic Product Innovation Research Project,China;Projects(52271130,52305344)supported by the National Natural Science Foundation of China;Projects(ZR2020ME017,ZR2020QE186)supported by the Natural Science Foundation of Shandong Province,China;Projects(AMGM2024F11,AMGM2021F10,AMGM2023F06)supported by the Science Fund of Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai,China;Project(KY90200210015)supported by Leading Scientific Research Project of China National Nuclear Corporation(CNNC),China。

摘　　要：WC particles reinforced CoCrFeNiMo high-entropy alloy(HEA)composite coatings were prepared on Cr12MoV steel successfully by laser cladding technology to improve the wear resistance of substrates.Effect of WC content on microstructure and wear property of the composite coatings was studied in detail.Large numbers of carbides with four main types:primary carbide crystals,eutectic structures,massive crystals growing along the periphery of the remaining WC particles and incompletely fused WC particles,were found to exist in the WC/CoCrFeNiMo composite coatings.With increasing WC content,the microhardness of coatings is gradually improved while the average friction coefficients follow the opposite trend due to solid solution strengthening and second phase strengthening effect.The maximum microhardness and minimum friction coefficient are HV_(0.2)689.7 and 0.72,respectively,for the composite coating with 30 wt.%WC,the wear resistance of the substrate is improved significantly,the wear mechanisms are spalling wear and abrasive wear due to their high microhardness.本文采用激光熔覆技术在Cr12Mo V钢表面成功制备了WC颗粒增强CoCrFeNiMo高熵合金复合涂层以提高基体耐磨性能。研究了WC含量对复合涂层显微组织演变、显微硬度和耐磨性能的影响。结果表明,WC/CoCrFeNiMo复合涂层中存在大量碳化物,主要包括初生树枝状碳化物、共晶碳化物、未完全熔化的残余WC颗粒和沿其外围生长的块状碳化物四种类型。随着WC含量的增加,由于固溶强化和第二相强化,涂层的显微硬度逐渐提高,平均摩擦因数和平均磨损量呈下降趋势。当WC添加量为30 wt.%时,复合涂层的耐磨性能显著提高,此时显微硬度达到最高值HV0.2689.7,摩擦因数降低至最小值0.72,其磨损机制主要为剥落磨损和磨粒磨损。

关 键 词：laser cladding CoCrFeNiMo coating WC particles MICROSTRUCTURE wear resistance 

分 类 号：TG1[金属学及工艺—金属学]