脉冲磁场处理对硬质合金/钛合金摩擦性能的影响  

Effects of Pulsed Magnetic Field Treatment on Tribological Properties of Cemented Carbide/Titanium Alloy

作　　者：陈喆 胥杨洋 闫乔松 陈依桐 张琳 吴明霞[1] 刘剑[1] Chen Zhe;Xu Yangyang;Yan Qiaosong;Chen Yitong;Zhang Lin;Wu Mingxia;Liu Jian(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China;School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;Teaching and Experiment Center for Fundamental Computer Courses,Sichuan University,Chengdu 610207,China)

机构地区：[1]四川大学机械工程学院,四川成都610065 [2]上海交通大学材料科学与工程学院,上海200240 [3]四川大学工程训练中心,四川成都610207

出　　处：《稀有金属材料与工程》2025年第3期697-705,共9页Rare Metal Materials and Engineering

基　　金：国家自然科学基金青年科学基金(52205490);四川大学-遂宁校市战略合作项目(2022CDSN-12,2023CDSN-9)。

摘　　要：采用脉冲磁场对不同钴(Co)含量的YG系列硬质合金球进行改性处理,通过往复式摩擦机及SEM研究脉冲磁场处理对YG6/YG8/YG12-钛合金(TC4)摩擦性能的影响。结果表明,脉冲磁场处理可以有效地降低YG系列硬质合金-TC4钛合金摩擦副的摩擦系数,场强弱改变了外源磁场输入的能量强度,以YG8为例,与未经磁场处理时相比,本研究梯度设计的0.5、1、1.5 T磁处理后平均摩擦系数分别减小20.5%、29.7%、25.9%;在磁场强度1 T时,YG6、YG8、YG12的平均摩擦系数分别下降了19.5%、29.7%、20.1%,随Co含量的增加,磁场的效果呈先上升后下降的趋势,Co含量为8%(质量分数)时的磁场效应最为显著。磁处理硬质合金时,脉冲磁场作为外源能量,引发Co相发生从fcc的α-Co向hcp的ε-Co的马氏体转变,从而引发位错增殖,提高硬质合金抵抗塑性变形的能力,宏观表现为硬质合金强度及耐磨性的提升,从而改善了摩擦性能。WC-Co cemented carbide balls with different cobalt(Co)contents were modified by pulsed magnetic field.The effects of pulsed magnetic field treatment on tribological properties of YG6/YG8/YG12-titanium alloy(TC4)were investigated by reciprocating friction machine and SEM.The results show that pulsed magnetic field treatment can effectively reduce the coefficient of friction(COF)of YG cemented carbides-TC4 titanium alloy friction pair.Main wear forms are adhesive wear and oxidation wear.Different intensities of pulsed magnetic field change the energy amount generated.Taking YG8 as an example,the average COF are reduced by 20.5%,29.7%,and 25.9%,after the magnetic 0.5,1,and 1.5 T treatments,respectively,compared with that without treatment.At magnetic field intensity of 1 T,the average COF of YG6,YG8,YG12 cemented carbide decreases by 19.5%,29.7%,20.1%,respectively.With the increase in Co content,the effect of the magnetic field treatment increases first and then decreases,and the magnetic field response is the most significant when the Co content is 8wt%.As an external energy,the pulsed magnetic field used on cemented carbide causes the Co phase fromα-Co toε-Co and thus results in dislocation proliferation;as a result,the ability of cemented carbide to resist plastic deformation is improved,and the corresponding macro-phenomenon is an increase in strength and wear resistance,so that the friction performance is finally improved.

关 键 词：脉冲磁场处理 YG硬质合金 TC4钛合金 摩擦性能 马氏体相变 

分 类 号：TB331[一般工业技术—材料科学与工程]