镍-钴-氧化铝复合电刷镀工艺及其性能
Electro-brush plating of nickel-cobalt-alumina composite coating and its properties
蔡铭泽 1喻世臣 2朱平 1黄宁 2王宏锋 2沈长斌 1徐常恩 3黄诗铭1
作者信息
- 1. 大连交通大学,辽宁 大连 116028
- 2. 沈阳飞机工业(集团)有限公司,辽宁 沈阳 110034
- 3. 大连华锐重工特种备件制造有限公司,辽宁 大连 116000
- 折叠
摘要
[目的]研究不同工艺参数和Al2O3纳米颗粒用量对 45 钢表面复合电刷镀Ni-Co-Al2O3的影响,提升 45 钢的耐磨性.[方法]通过扫描电子显微镜观察不同条件下所得镀层的表面形貌及截面形貌,以确定合适的工艺参数.再在此基础上研究了Al2O3纳米颗粒质量浓度对Ni-Co-Al2O3复合镀层显微硬度和耐磨性的影响,结合磨损形貌观察和元素组成分析,探讨了复合镀层的磨损机理.[结果]复合电刷镀的较佳工艺参数为:电压10 V,温度40～50℃,镀笔速率6～8 m/min.镀液中Al2O3 纳米颗粒的质量浓度为 20 g/L时,Ni-Co-Al2O3 复合镀层的显微硬度最高(约为 850 HV),耐磨性最好.Ni-Co-Al2O3复合镀层的磨损机理以疲劳磨损为主,并伴随轻微的粘着磨损.[结论]通过电刷镀技术可在 45 钢表面获得高硬度、耐磨损的Ni-Co-Al2O3复合镀层.
Abstract
[Introduction]The effects of different process parameters and Al2O3 nanoparticle dosage on electro-brush plating of Ni-Co-Al2O3 composite coating need to be studied to improve the wear resistance of 45 steel.[Method]The process parameters of electro-brush plating were optimized by observing surface and cross-section morphologies of Ni-Co-Al2O3 composite coating with scanning electron microscope,and then the effect of mass concentration of Al2O3 nanoparticles in electrolyte on the microhardness and wear resistance of Ni-Co-Al2O3 composite coating was studied.The wear mechanism of the composite coating was discussed based on morphology observation and elemental composition analysis of worn surface.[Result]The appropriate process parameters of electro-brush plating were determined as follows:voltage 10 V,temperature 40-50 °C,and moving rate of plating pen 6-8 m/min.The Ni-Co-Al2O3 composite coating obtained with 20 g/L of Al2O3 nanoparticles in electrolyte featured the highest microhardness(about 850 HV)and the best wear resistance.The wear mechanism of Ni-Co-Al2O3 composite coating was dominated by fatigue wear and accompanied by slight adhesive wear.[Conclusion]Ni-Co-Al2O3 composite coatings with high hardness and excellent wear resistance can be obtained on 45 steel by electro-brush plating.
关键词
复合电刷镀/镍/钴/纳米氧化铝/显微硬度/耐磨性Key words
composite electro-brush plating/nickel/cobalt/alumina nanoparticle/microhardness/wear resistance引用本文复制引用
基金项目
国家自然科学基金(51605070)
辽宁省教育厅科技项目(LJKMZ20220861)
出版年
2024
NETL
NSTL
万方数据