Differences in dry sliding wear behavior between HVAF-sprayed amorphous steel and crystalline stainless steel coatings
Differences in dry sliding wear behavior between HVAF-sprayed amorphous steel and crystalline stainless steel coatings
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HVAF 喷涂非晶钢和结晶不锈钢涂层之间干滑动磨损行为的差异
DOI：
10.1016/j.jmst.2018.11.006
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发表时间：
2018
影响因子：
10.9
通讯作者：
Wang Jianqiang
中科院分区：
文献类型：
--
作者：
Guo Hui;Zhang Suode;Sun Wenhai;Wang Jianqiang
研究了高速空气-燃料喷射法制备的非晶钢涂层（ASC）和结晶不锈钢涂层（SSC）的干滑动磨损行为。随着法向载荷的增加，ASC的摩擦系数（COF）从0.78略微降低到0.69。SSC的COF在各种荷载作用下变化不大，但随滑动时间的增加而增加，且波动较大。根据剪切应力和闪蒸温度的作用，可以理解这两种涂层之间摩擦行为的差异。SSC的磨损率远高于ASC，表明ASC具有更好的耐磨性。耐磨性的增强与硬度(H)的提高、杨氏模量（Er）的降低以及H/ er3和h3 /Er2的比值有关。对磨损表面和亚表面的详细分析表明，ASC的磨损机制包括脱层、磨粒和氧化磨损，而SSC的磨损机制为脱层和氧化。
Dry sliding wear behavior of amorphous steel coating (ASC) and crystalline stainless steel coating (SSC) manufactured by high-velocity-air-fuel-spraying was investigated. With increasing normal load, coefficient of friction (COF) of ASC decreases slightly from 0.78 to 0.69. COF of SSC presents a minor difference under various normal loads but increases with sliding time accompanied by relatively large fluctuation. Such a difference in friction behavior between such two coatings can be understood based upon the roles of shear stress and flash temperature. Wear rate of SSC is much higher than that of ASC, suggesting better wear resistance of ASC. The enhanced wear resistance is correlated with high hardness (H), reduced Young’s modulus (Er), and ratios ofH/ErandH3/Er2. Detailed analyses on worn surfaces and sub-surfaces indicate that the wear mechanisms for ASC include delamination, abrasive and oxidation wear, whereas those for SSC are delamination and oxidation.