磁场处理对YG8硬质合金性能及耐磨性的影响  

Effect of magnetic field treatment on properties and wear resistance of YG8 cemented carbide

作　　者：韦辽 杨屹[2] Wei Liao;Yang Yi(College of Arts and Sciences,Guangxi Open University,Nanning Guangxi 530022,China;College of Mechanical Engineering,Sichuan University,Chengdu Sichuan 610065,China)

机构地区：[1]广西开放大学文理学院,广西南宁530022 [2]四川大学机械工程学院,四川成都610065

出　　处：《金属热处理》2024年第4期161-167,共7页Heat Treatment of Metals

基　　金：广西高校中青年教师科研基础能力提升项目(2020KY79003)。

摘　　要：通过显微组织观察、力学性能试验、摩擦磨损试验和车削试验,研究了磁场处理对YG8硬质合金微观组织、力学性能及耐磨性的影响,并对磁场处理刀具的切削性能进行了评价。结果表明,经脉冲磁场处理后,YG8硬质合金试样断裂韧性有所提高,耐磨性显著增强,摩擦因数减小,同时硬质合金刀具切削的工件表面光滑平坦,整体加工质量高。在脉冲磁场作用下,材料会发生磁致塑性效应,为位错运动提供驱动力,使位错更容易产生增殖和滑移,位错密度增加,从而使材料力学性能显著提高,改善耐磨性能。Effect of magnetic field treatment on microstructure,mechanical properties and wear resistance of YG8 cemented carbide was studied by means of microstructure observation,mechanical properties test,friction and wear test and machining test,and the machining performance of the magnetic field treated cemented carbide tool was evaluated.The results show that after magnetic field treatment,the fracture toughness of the YG8 cemented carbide specimens are improved,the wear resistance is significantly enhanced,and the friction coefficient is reduced.Meanwhile,the surface of the workpiece machined by the cemented carbide tool with magnetic field treatment is smooth and flat,and the overall machining quality is high.Under the action of pulsed magnetic field,magnetoplastic effect will occur in the material,which provides driving force for dislocation movement,and the dislocations are more prone to generate proliferation and slip,the dislocation density increases,so that the mechanical properties of the material are significantly increased,and the wear resistance is improved.

关 键 词：硬质合金 磁场处理 力学性能 摩擦磨损 耐磨性 位错 

分 类 号：TG135.5[一般工业技术—材料科学与工程]