(广东工业大学 材料与能源学院， 广州 510090)
摘 要: 用电刷镀方式制备了Ni-W（D）合金镀层， 测试了镀层在不同温度下的氧化与滑动磨损速率， 用扫描电镜观察了试样磨损表面的形貌。 结果表明： Ni-W（D）合金刷镀层在600℃以下具有较高的抗氧化能力， 超过700℃时由于氧化膜中WO3的增加， 镀层抗氧化能力下降； 500℃以下时， 由于镀层氧化膜的减摩作用， Ni-W（D）合金刷镀层的磨损机理主要是轻微磨粒磨损； 600℃以上时， 镀层的磨损机理主要为镀层剥落和粘着磨损， 磨损速率较大。
关键字: Ni-W（D）合金; 电刷镀; 高温氧化; 高温磨损
（Faculty of Material and Energy, Guangdong University of Technology,
Guangzhou 510090, China）
Abstract:The Ni-W alloy coating layer was prepared by brush plating. The oxidation and wear rate of the coating at elevated temperature were determined, the phases presence of the coating layer were examined by the X-ray diffraction, and the worn surfaces were observed with a scanning electron microscope in order to analyze the coating wear mechanism. The results show that, the brush plated layer is characterized by slight oxidation below 600℃; above 700℃ the oxidation resistance decreases evidently due to the WO3 formed in the oxidation film; a relatively low wear rate is observed below 500℃ and the wear mechanism is scratching abrasion; while test temperature is above 600℃, the wear rate increases obviously, the main wear mechanisms are adhesive wear and spalling of the coating layer.
Key words: Ni-W alloy; brush plating; oxidation; high temperature wear behavior
