论文部分内容阅读
以65Mn钢为研究对象,使用电弧熔敷由WC、Ti C和Co组成的硬质合金粉末,在材料表面形成电弧熔敷层。使用光学显微镜,X射线衍射分析仪和扫描电镜观察和分析了电弧熔敷层的组织与结构,并通过显微硬度计和磨粒磨损试验机研究了熔敷层的硬度和耐磨性能。结果表明,电弧熔敷硬质合金可在65Mn钢表面形成与基体结合紧密的耐磨涂层,当涂层中Co、Ti C和WC含量分别为45%,20%和35%时,硬质合金涂层表面的平均磨损量仅为未处理65Mn旋耕刀的27%。电弧熔敷可显著提高表层显微硬度,改善表面耐磨性能,提高耕作部件的使用寿命。
Taking 65Mn steel as the research object, an arc cladding layer was formed on the surface of the material by arc welding the cemented carbide powder composed of WC, TiC and Co. The microstructure and structure of the arc cladding layer were observed and analyzed by optical microscope, X-ray diffraction analyzer and scanning electron microscope. The hardness and wear resistance of the cladding layer were studied by micro-hardness tester and abrasive wear tester. The results show that the arc-welding cemented carbide can form a wear-resistant coating on the surface of 65Mn steel. When the contents of Co, Ti C and WC are 45%, 20% and 35% respectively, The average wear on the alloy coating surface was only 27% of the untreated 65Mn rotary cutter. Arc welding can significantly improve the surface microhardness, improve the surface wear resistance, improve the service life of tillage components.