WC-10Co-MoS_(2)@Ni自润滑硬质合金与钛合金的摩擦学性能研究  

Tribological Properties of WC-10Co-MoS_(2)@Ni Self-lubricating Cemented Carbide and Titanium Alloy

作　　者：何乃如 支斌斌 贾均红 杨杰 陈威[1] HE Nairu;ZHI Binbin;JIA Junhong;YANG Jie;CHEN Wei(College of Mechanical and Electrical Engineering,Shaanxi University of Science&Technology,Xi’an Shaanxi 710021,China)

机构地区：[1]陕西科技大学机电工程学院,陕西西安710021

出　　处：《润滑与密封》2023年第8期25-34,共10页Lubrication Engineering

基　　金：国家自然科学基金青年项目(51905325)。

摘　　要：为探究WC-10Co-MoS_(2)@Ni自润滑硬质合金与TC4钛合金的摩擦学性能,通过热压烧结制备不同含量MoS_(2)@Ni的硬质合金试样,采用扫描电子显微镜、三维轮廓仪、维氏硬度计等分析自润滑硬质合金的组织结构和力学性能,利用往复式摩擦试验机研究干摩擦、切削液环境和深冷环境下硬质合金与钛合金的摩擦学性能。结果表明:随着硬质合金中MoS_(2)@Ni含量的增加,表面孔隙减少,力学性能缓慢下降;在干摩擦、切削液环境和深冷环境下,摩擦因数均随MoS_(2)@Ni含量的增加而降低;钛合金和硬质合金在干摩擦时由于钛合金的黏附,阻碍了MoS_(2)发挥润滑作用,磨损形式以黏着和氧化为主;在切削液环境中磨损形式以磨粒磨损和黏着磨损为主,而在深冷环境下减少了氧化和黏着,其磨损形式主要为磨粒磨损,并伴有分层磨损现象。In order to investigate the tribological performance of WC-10Co-MoS_(2)@Ni self-lubricating cemented carbide and TC4 titanium alloy,cemented carbide specimens with different contents of MoS_(2)@Ni were prepared by hot press sintering,the microstructure and mechanical properties of self-lubricating cemented carbide were analyzed by the scanning electron microscopy,3D profilometer and Vickers hardness tester,etc.The tribological properties of cemented carbide and titanium alloy under dry friction,cutting fluid and cryogenic conditions were studied by reciprocating friction tester.The results show that with the increase of MoS_(2)@Ni content in the cemented carbide,the surface pores decrease and the mechanical properties slowly decline.The friction coefficient decreases with the increase of MoS_(2)@Ni content under dry friction,cutting fluid and cryogenic conditions.Due to the adhesion of titanium alloy,the lubrication effect of MoS_(2)is hindered during dry friction,and the main wear forms are adhesion and oxidation.In the cutting fluid environment,the abrasive wear and adhesive wear are dominant.In cryogenic environments,oxidation and adhesion are reduced,and the main wear form is abrasive wear,accompanied by delamination.

关 键 词：自润滑硬质合金 钛合金 摩擦磨损 深冷环境 

分 类 号：TG135.5[一般工业技术—材料科学与工程]