【摘 要】
：
将Ti、Al按一定比例混合压制烧结成电极,置于含碳的液相介质中,利用脉冲放电所产生的低温高能等离子体在45钢基体上沉积(Ti,Al)C硬质金属陶瓷涂层;并对涂层进行高温磨损试验
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将Ti、Al按一定比例混合压制烧结成电极,置于含碳的液相介质中,利用脉冲放电所产生的低温高能等离子体在45钢基体上沉积(Ti,Al)C硬质金属陶瓷涂层;并对涂层进行高温磨损试验。结果表明:试验温度高于200℃时,涂层的摩擦系数随温度的升高而降低;观察涂层磨损形貌发现,低温时,磨痕为平行犁沟,表明涂层的磨损机理为磨粒磨损;高温时,犁沟比室温时浅且表面有氧化物,其磨损机理为轻微磨粒磨损和氧化磨损。
The Ti and Al are mixed and pressed to be sintered into an electrode and placed in a carbon-containing liquid medium and deposited on a 45 steel substrate by using a low-temperature and high-energy plasma generated by a pulse discharge (Ti, Al) C hard cermet coating Layer; and the coating for high temperature wear test. The results show that when the test temperature is higher than 200 ℃, the friction coefficient of the coating decreases with the increase of the temperature. The wear morphology of the coating is observed to be a parallel furrow at low temperature, indicating that the abrasion mechanism of the coating is grinding Grain wear; high temperature, the furrow shallow than at room temperature and the surface oxide, the wear mechanism is a slight abrasive wear and oxidation wear.
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