激光熔覆VN增强Fe基合金涂层组织和耐磨性能研究  

Microstructure and Wear Resistance of VN-reinforced Iron-base Alloy Coating Fabricated by Laser Cladding Technology

作　　者：晁永礼 张浦津 丁林 CHAO Yongli;ZHANG Pujin;DING Lin(School of Mechanical and Automotive Engineering,West Anhui University,Anhui 237012,Lu’an China)

机构地区：[1]皖西学院机械与车辆工程学院,安徽六安237012

出　　处：《热处理》2024年第5期21-23,26,共4页Heat Treatment

基　　金：安徽省大学生创新训练项目(S202210376140);皖西学院大学生创新训练项目(wxxy2022084)。

摘　　要：采用激光熔覆技术在Q235钢上制备了VN增强Fe基合金涂层。检测了涂层的微观组织、硬度和耐磨性。结果表明:VN增强Fe基合金涂层组织由α-Fe、Cr_(23)C_(6)、Cr_(7)C_(3)、VN和FeV组成,弥散的FeV和VN使涂层中粗大枝晶断裂成细小均匀的短棒状枝晶和等轴晶;与Fe基合金涂层相比,VN增强Fe基合金涂层的硬度提高了27.28%,磨损失重降低了42.79%。VN-reinforced iron-base alloy coating was fabricated on Q235 steel by a laser cladding technology.The coating was tested for microstructure,hardness and wear resistance.The results showed that(a)the VN-reinforced iron-base alloy coating consisted ofα-Fe、Cr_(23) C_(6)、Cr_(7)C_(3)、VN and FeV,and the dispersed FeV and VN caused coarse dendrites to break down into fine uniform short-rod-like dendrites and equiaxed crystals;and(b)the hardness of the VN-reinforced iron-base alloy coating was 27.28%higher than that of the iron-base alloy coating,and the wear-induced weight loss of the VN-reinforced iron-base alloy coatings was 42.79%less than that of the iron-base alloy coating.

关 键 词：激光熔覆 FE基合金 VN 耐磨性 

分 类 号：TN249[电子电信—物理电子学]