Hardness and friction and wear property of Cu-WC composite coating on titanium alloy prepared by pulse electrodeposition Feng Xujia 1 Sun Hao 1* Gao Chenjing 2 Zhu Qingqin 1[J].Plating & Finishing,2024,(11):58-66.
钛合金脉冲电沉积 Cu-WC 复合镀层的硬度与摩擦磨损性能
- Title:
- Hardness and friction and wear property of Cu-WC composite coating on titanium alloy prepared by pulse electrodeposition Feng Xujia 1 Sun Hao 1* Gao Chenjing 2 Zhu Qingqin 1
- 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
- Keywords:
- Cu-WC composite coating ; titanium alloy ; pulse electrodeposition ; hardness ; friction and wear property
- 分类号:
- TQ153
- 文献标志码:
- A
- 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。
- Abstract:
- ： 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 electrodeposition 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.
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备注/Memo
收稿日期： 2024-04-18 修回日期： 2024-06-25 作者简介： 封旭佳（ 1992 —），硕士，讲师，主要研究方向：纳米材料制备、材料表面改性， email ： Feng_tech1992@126.com * 通信作者： 孙浩（ 1989 —），硕士，讲师，主要研究方向：先进材料成形、表面工程， email ： Edu_061199tech@126.com 基金项目： 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 ） 钛合金脉冲电沉积 Cu-WC 复合镀层的硬度与摩擦磨损性能