苏鹏,刘豪,王小红,龙武,蒋焰罡,李子硕,王强

• 1:中国石油化工股份有限公司西北油田分公司石油工程技术研究院
• 2:西南石油大学新能源与材料学院
• 3:株洲硬质合金集团有限公司

摘要(Abstract)：

采用化学镀的方法在2024铝合金表面制备了Ni-W-P/TiO_2复合镀层,基于差示扫描量热法(DSC)结果,确定了复合镀层热处理温度范围为350～550℃。利用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射仪(XRD)、维氏硬度测试仪、滑动磨损试验机和电化学工作站等研究了热处理温度对Ni-W-P/TiO_2复合镀层的形貌、组织结构、耐磨性与耐蚀性的影响。结果表明:随着热处理温度的升高,Ni-W-P/TiO_2复合镀层表面变得平整且致密,但热处理温度超过450℃时,镀层表面晶粒变得粗大;截面形貌观察发现,复合镀层与基体结合良好,无明显裂纹;随着热处理温度升高,Ni-W-P/TiO_2复合镀层由非晶态结构向晶态结构转变,在450℃热处理后镀层析出Ni_3P相,此时镀层的显微硬度最大(849.1 HV0.1),平均摩擦系数最小(0.069),磨损速率最低(0.138 mg/min);在400℃热处理后镀层的耐蚀性最好,高于400℃热处理后,镀层的耐蚀性有所下降。

关键词(KeyWords)： Ni-W-P/TiO_2复合镀层;热处理;耐蚀性;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 四川省科技厅项目(21YYJC1046)

作者(Author): 苏鹏,刘豪,王小红,龙武,蒋焰罡,李子硕,王强

DOI: 10.13289/j.issn.1009-6264.2021-0304

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