KONG Dan*,LUO Zhiqiang,JIN Shengran.Preparation and Tribological Properties of Electroless Plating on Copper Alloy[J].Plating & Finishing,2022,(8):23-30.[doi:doi ： 10.3969/j.issn.1001-3849.2022.08.005]
铜合金的表面化学镀层制备与摩擦学性能研究
- Title:
- Preparation and Tribological Properties of Electroless Plating on Copper Alloy
- Keywords:
- copper alloy ; electroless coating ; microstructure ; hardness ; tribological properties
- 分类号:
- TB306
- 文献标志码:
- A
- 摘要:
- 采用化学复合镀的方法在铜合金表面制备了 Ni-P-TiN-Re 化学镀层，考察了 NH 4 ReO 4 添加量和镀后热处理温度对化学镀层物相组成、显微形貌、硬度和摩擦学性能的影响。结果表明，热处理前不同 NH 4 ReO 4 添加量的化学镀层表面主要由基体 CuZn 相和非晶态 Ni 相组成，镀液中加入不同添加量 NH 4 ReO 4 后，镀层表面胞状颗粒减少，镀层致密程度相对有所提高；当 NH 4 ReO 4 添加量为 0 、 1 、 2 、 3 和 4 g/L 时，化学镀层的截面厚度分别为 11.9 um 、 15.8 um 、 16.2 um 、 15.6um 和 15.3 um ，磨痕宽度分别为 136 um 、 148 um 、 128 um 、 93 um 和 125 um ；添加 NH 4 ReO 4 后，化学镀层的硬度都有不同程度提高，且 NH 4 ReO 4 添加量越大则镀层硬度越高； NH 4 ReO 4 为 3 g/L 时，镀层磨痕宽度最小且磨痕相对更加平整，磨损率相对较低。热处理后， NH 4 ReO 4 为 3 g/L 时化学镀层在温度升高至 400 ℃ 及以上时，化学镀层中开始出现晶态 Ni 3 P 相，且随着热处理温度升高，化学镀层的显微硬度呈现先升高后减小特征，在温度为 400 ℃ 时取得最大值（ 1178 HV ），此时化学镀层的稳定摩擦系数最小、磨损率最低，具有最佳的耐磨性能，磨损机制为氧化磨损 + 黏着磨损。
- Abstract:
- ： Ni-P-TiN-Re electroless coatings were prepared on copper alloy by electroless composite plating ， the effects of NH 4 ReO 4 addition and heat treatment temperature on the phase composition ， microstructure ， hardness and tribological properties of the electroless coatings were investigated. The results show that the surface of electroless coating with different addition of NH 4 ReO 4 before heat treatment is mainly composed of CuZn phase and amorphous Ni phase. After adding different amount of NH 4 ReO 4 into the plating bath ， the cellular particles on the surface of the coating decrease and the compactness of the coating is relatively improved. When the addition amount of NH 4 ReO 4 is 0 ， 1 ， 2 ， 3 and 4 g/L ， the section thickness of the electroless coating is 11.9 ， 15.8 ， 16.2 ， 15.6 and 15.3 um ， The wear scar widths were 136 ， 148 ， 128 ， 93 and 125 um ， respectively. The results show that the hardness of the electroless coating increases with the addition of NH 4 ReO 4 ， and the hardness of the coating increases with the addition of NH 4 ReO 4 . When the content of NH 4 ReO 4 is 3 g/L ， the width of wear scar is the smallest and the wear scar is relatively smooth and the wear rate is relatively low. After heat treatment ， when the temperature of NH 4 ReO 4 is 3 g/L ， crystalline Ni 3 P phase begins to appear in the electroless coating when the temperature rises to 400 ℃. With the increase of heat treatment temperature ， the microhardness of the electroless coating first increases and then decreases ， and reaches the maximum value （ 1178 HV ） at 400 ℃. At this time ， the electroless coating has the lowest stable friction coefficient and wear rate ， and has the best wear resistance ， the wear mechanism is oxidation wear and adhesive wear.
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备注/Memo
收稿日期： 2020-07-01 修回日期： 2020-09-30 作者简介： 孔丹（ 1986- ），女，硕士，讲师。 email ： 13523504720@139.com 基金项目： 郑州市科技攻关项目（ 173SGZG23115 ），中国博士后基金项目（ 20171520986 ）