钛合金脉冲电沉积Cu-WC复合镀层的硬度与摩擦磨损性能  

Hardness and friction and wear property of Cu-WC composite coating on titanium alloy prepared by pulse electrodeposition

作　　者：封旭佳 孙浩 高晨静 朱庆芹 Feng Xujia;Sun Hao;Gao Chenjing;Zhu Qingqin(School of Mechanical and Power Engineering,Cangzhou Jiaotong College,Cangzhou 061199,China;School of Chemical and Pharmaceutical Engineering,Cangzhou Jiaotong College,Cangzhou 061199,China)

机构地区：[1]沧州交通学院机械与动力工程学院,河北沧州061199 [2]沧州交通学院化学与制药工程学院,河北沧州061199

出　　处：《电镀与精饰》2024年第11期58-66,共9页Plating & Finishing

基　　金：河北省教育厅河北省高等学校科学技术研究项目(ZC2023077);沧州市科技计划项目(222107010);沧州交通学院科研基金资助项目(CJ202301003)。

摘　　要：为有效提高钛合金的抗摩擦磨损性能,在钛合金表面脉冲电沉积Cu-WC复合镀层。分别研究了平均电流密度、脉冲占空比对复合镀层的微观形貌、WC颗粒含量、硬度以及摩擦磨损性能的影响。结果表明:当平均电流密度为1.5 A/dm^(2)、脉冲占空比为20%时,电沉积的Cu-WC复合镀层致密性最好,WC颗粒含量接近2.4%,其硬度(240.4 HV)约为纯Cu镀层的2倍,还表现出良好的抗摩擦磨损性能,平均摩擦系数较钛合金降低约38%。适当增大平均电流密度(0.5~1.5 A/dm^(2))或提高脉冲占空比(10~20%)能使较多WC颗粒参与电沉积过程,起到明显细化晶粒作用和弥散强化作用,促进形成结构致密的Cu-WC复合镀层,因而具有较高硬度和良好的抗摩擦磨损性能。Cu-WC composite coating was prepared on titanium alloy by pulse electrodeposition in order to effectively improve the friction and wear property of titanium alloy,and the effect of average current density or pulse duty cycle on the microstructure,content of WC particles,hardness and friction and wear property of the composite coating was investigated respectively.The results show that the Cu-WC composite coating electrodeposited under the condition of average current density 1.5 A/dm^(2) and pulse duty cycle 20%has compact structure with the content of WC particles close to 2.4%,and the hardness reaches 240.4 HV,which is twice the hardness of pure Cu coating.Moreover,the Cu-WC composite coating possesses good friction and wear property,and the average friction coefficient is about 38%lower than that of pure Cu coating.Appropriately increasing the average current density(0.5‒1.5 A/dm^(2))or the pulse duty cycle(10‒20%)can urge more WC particles participate in the electrodepo‐sition process,which plays a significant role in refining grains and strengthening dispersion,and promote the formation of dense Cu-WC composite coating that shows high hardness and good friction and wear resistance.

关 键 词：Cu-WC复合镀层 钛合金 脉冲电沉积 硬度 摩擦磨损性能 

分 类 号：TQ153[化学工程—电化学工业]