TC4合金在不同环境介质中的磨损行为及磨损机制研究

发布时间：2018-05-15 04:32

本文选题：TC合金 + 环境介质　；参考：《稀有金属》2015年09期

【摘要】：采用MPX-2000型销盘式摩擦磨损试验机,研究了TC4合金在空气、纯水和模拟海水环境下与GCr15轴承钢对磨时的磨损行为和磨损机制,评价不同环境介质对TC4合金耐磨性的影响。结果表明:TC4合金在模拟海水中的磨损率始终最高,明显高于其在纯水和空气中的磨损率,且在模拟海水中磨损时TC4合金腐蚀速度大大加快,可见腐蚀和磨损之间存在明显的相互促进作用。TC4合金在模拟海水中形成的润滑膜可以明显降低摩擦系数,因而不同工况下模拟海水中的摩擦系数始终较低,纯水中的摩擦系数略高于海水,而空气中的摩擦系数在0.50及0.75 m·s-1,1.02 MPa时明显高于纯水和海水,在0.75 m·s-1,2.55 MPa时反而略低于纯水和模拟海水。TC4合金在空气中的磨损机制为氧化磨损并伴有一定程度的磨粒磨损和粘着磨损;在纯水中的磨损机制为磨粒磨损;而在模拟海水中则为疲劳磨损和磨粒磨损混合作用机制。
[Abstract]:The wear behavior and wear mechanism of TC4 alloy with GCr15 bearing steel in air, pure water and simulated seawater environment were studied by using MPX-2000 Pin-Disc friction and Wear testing Machine. The effects of different environmental media on the wear resistance of TC4 alloy were evaluated. The results show that the wear rate of TC4 alloy in simulated seawater is always the highest, which is obviously higher than that in pure water and air, and the corrosion rate of TC4 alloy in simulated seawater is greatly accelerated. It can be seen that there is obvious interaction between corrosion and wear. The lubricating film formed by TC4 alloy in simulated seawater can obviously reduce the friction coefficient, so the friction coefficient in simulated seawater is always lower under different working conditions. The friction coefficient of pure water is slightly higher than that of seawater, but the friction coefficient in air is obviously higher than that in pure water and seawater at 0.50 and 0.75 m ~ (-1) ~ (-1) MPa. On the contrary, the wear mechanism of pure water and simulated seawater. TC4 alloy in air is oxidation wear with some degree of abrasive wear and adhesion wear, and the wear mechanism in pure water is abrasive wear at 0.75 m ~ (-1) ~ (-1) ~ 2.55 MPa. In simulated seawater, the mixed mechanism of fatigue wear and abrasive wear is presented.
【作者单位】：宿迁学院金属材料教研室;江苏大学材料科学与工程学院;
【基金】：江苏省教育厅自然科学基金项目(13KJD430004) 江苏省研究生创新工程项目(CXLX13_652) 宿迁学院科研基金项目(2015KY28)资助
【分类号】：TG146.23

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