Ni/WC复合镀层与Ni-W合金镀层力学性能比较  

Comparison of Mechanical Properties of Ni/WC Composite Coating and Ni-W Alloy Coating

作　　者：林立[1] 韩华[1] LIN Li;HAN Hua(School of Mechanical and Automotive Engineering,Kaifeng University,Kaifeng 475000,China)

机构地区：[1]开封大学机械与汽车工程学院,河南开封475000

出　　处：《电镀与精饰》2022年第8期7-12,共6页Plating & Finishing

摘　　要：在Q235钢表面分别制备纯Ni镀层、Ni/WC复合镀层、Ni-W合金镀层,测试并表征了不同镀层的成分、晶相结构、硬度、韧性、弹性及抗拉强度。结果表明:Ni/WC复合镀层中WC颗粒弥散分布,含量约为6.52%。Ni-W合金镀层的成分以Ni和W元素为主,W元素质量分数达到34.2%。与纯Ni镀层相比,Ni/WC复合镀层和Ni-W合金镀层的硬度分别提高了约112 HV、232 HV,抗拉强度分别提高了240 MPa、420 MPa。Ni与W诱导共沉积形成置换固溶体起到细化晶粒和固溶强化的作用,使Ni-W合金镀层的平整度和致密性明显好于Ni/WC复合镀层,抵抗塑性变形能力和弹性恢复能力增强,能够较大幅度提高Q235钢制件整体性能。Pure Ni coating,Ni/WC composite coating and Ni-W alloy coating were prepared on the sur‐face of Q235 steel respectively,and the composition,crystal phase structure,hardness,toughness,elasticity and tensile strength of different coatings were characterized and tested.The results showed that WC particles was distributed diffusing in Ni/WC composite coating and its content was about 6.52%,Ni-W alloy coating was mainly composed of Ni and W,and the mass fraction of W reached 34.2%.Compared with pure Ni coating,the hardness of Ni/WC composite coating and Ni-W alloy coat‐ing was increased by 112 HV and 232 HV,and the tensile strength was increased by 240 MPa and 420 MPa,respectively.The replacement solid solution formed by Ni and W induced co-deposition plays a role in grain refinement and solution strengthening,so the flatness and compactness of Ni-W alloy coating were obviously better than that of Ni/WC composite coating,and the plastic deformation resis‐tance and elastic recovery ability were enhanced,it can greatly improve the overall performance of Q235 steel parts.

关 键 词：纯Ni镀层 Ni/WC复合镀层 Ni-W合金镀层 硬度 韧性 抗拉强度 

分 类 号：TQ153[化学工程—电化学工业]