摘要
为有效提高Cr12MoV模具钢的抗磨损性能,采用电沉积工艺在Cr12MoV模具钢表面制备Co-W合金镀层、Co-W/ZrO_(2)复合镀层、Co-W/MoS_(2)复合镀层和Co-W/ZrO_(2)+MoS_(2)复合镀层。分析了不同Co基镀层的形貌特征、成分和物相结构,并检测了不同Co基镀层的厚度、硬度和抗磨损性能。结果表明:Co-W合金镀层、Co-W/ZrO_(2)复合镀层、Co-W/MoS_(2)复合镀层和Co-W/ZrO_(2)+MoS_(2)复合镀层的形貌特征存在差异,平均晶粒尺寸依次减小,硬度依次增大,抗磨损性能依次增强;但不同Co基镀层的厚度基本相同,并且都呈现Co3W相(200)晶面择优取向。ZrO_(2)颗粒和MoS_(2)颗粒共同参与电沉积过程起到明显的细晶强化作用,还可能引起晶格畸变,促进形成晶粒细小(平均晶粒尺寸为54.2nm)、结构致密的Co-W/ZrO_(2)+MoS_(2)复合镀层,具有高硬度(543.2HV)以及更强的抗塑性变形能力和抗刮擦损伤能力,其抗磨损性能明显好于Co-W合金镀层、Co-W/ZrO_(2)复合镀层、Co-W/MoS_(2)复合镀层。Co-W/ZrO_(2)+MoS_(2)复合镀层作为功能性镀层能有效减轻Cr12MoV模具钢表面磨损。
Co-W alloy coating,Co-W/ZrO_(2) composite coating,Co-W/MoS_(2) composite coating and Co-W/ZrO_(2)+MoS_(2) composite coating were prepared on the surface of Cr12MoV die steel by electrodeposition in order to effectively improve the anti-wear performance of Cr12MoV die steel.The morphology characteristics,composition and phase structure of different Co-based coatings were analyzed,and the thickness,hardness and anti-wear performance of different Co-based coatings were tested.The results show that the morphology characteristics of Co-W alloy coating,Co-W/ZrO_(2) composite coating,Co-W/MoS_(2) composite coating and Co-W/ZrO_(2)+MoS_(2) composite coating are different,the average grain size decreases sequentially,the hardness increases sequentially and the anti-wear performance improves sequentially.However,the thickness of different Co-based coatings is similar,and all show the Co3W(200)crystal face preferred orientation.ZrO_(2) particles and MoS_(2) particles participate in electrodeposition can significantly refine grains,and may also cause lattice distortion,and promote the formation of dense Co-W/ZrO_(2)+MoS_(2) composite coating with fine grains (average grain size is 54.2 nm), high hardness (543.2 HV) and stronger resistance to plastic deformation and scratch damage. The anti-wear performance of Co-W/ZrO_(2)+MoS_(2) composite coating is obviously better than that of Co-W alloy coating, Co-W/ZrO_(2) composite coating and Co-W/MoS_(2) composite coating. Co-W/ZrO_(2)+MoS_(2) composite coating can be used as a functional coating, which can effectively reduce the surface wear of Cr12MoV die steel.
作者
孙艳
任伟和
Sun Yan;Ren Weihe(Department of Mechanical and Electrical Engineering,Xinzhou Vocational and Technical College,Xinzhou 034000,China;Hebei Polytechnic Institute,Shijiazhuang 050091,China)
出处
《电镀与精饰》
CAS
北大核心
2024年第12期70-78,共9页
Plating & Finishing
基金
河北省科技攻关项目(202102210073)。
作者简介
通信作者:孙艳(1981-),女,硕士,讲师,主要研究方向为机械设计与制造、表面工程等,email:wen_cici20@126.com。
