摘要
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。
Cemented carbide coatings,with WC,Ti C and Co powders as raw materials,were fabricated on 65 Mn steel using arc cladding technique. The structure and properties of the coatings were observed and analyzed by optical microscope( OM),X-ray diffraction( XRD),scanning electron microscopy( SEM),micro-hardness and abrasive wear tests. The results show that the clad cemented carbide coating is well bound to the substrate. The average wear mass loss of the coating with content of 45% Co,20% TiC and 35% WC is only27% of that of the 65 Mn steel rotary blade. The arc clad coatings improve the surface micro-hardness and wear resistance of 65 Mn steel significantly,and the service life of the parts of the rotary tiller can be improved greatly by the arc cladding of cemented carbide coatings.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第3期189-193,共5页
Transactions of Materials and Heat Treatment
基金
中国博士后基金(2012M511092)
山西省科技攻关计划项目(20100311060)
关键词
耕作部件
电弧熔敷
硬质合金
摩擦磨损
tillage parts
welding arc deposition
cemented carbide
friction and wear
