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Investigations on Dry Sliding Wear and Corrosion Resistance of Thermal Sprayed Molybdenum Coatings

机译:热喷涂钼涂层干式滑动磨损和耐腐蚀性研究

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This paper aims to investigate the characteristics of molybdenum thermal sprayed coatings deposited on 1.0570 steel substrate and compare them with the characteristics of the uncoated carbon steel (1.0570), respectively alloyed steels (1.7219 and 1.6582), which are currently used for similar applications, such as parts and structural components used at temperatures down to -100°C, aircraft, terrestrial transportation and other industries. The Mo coating deposition was performed by wire metallization and aimed to increase the wear and corrosion resistance of steels typically applied in railway transportation industry. The microhardness, wear behaviour and corrosion resistance have been investigated for all the presented materials. Molybdenum coatings deposited by wire metallization technique possess superior frictional behaviour due to the formation of an oxide tribo-film. Therefore, the friction coefficient of the presently investigated Mo coatings reached a value of 0.65, correlated with a low wear rate of about 0.65T0~(-5) mm~3 N~(-1)m~(-1). The porosity degree of the Mo coatings was found to be around 3.50%, a common value for this type of coatings. Microhardness average value of Mo coating was 480 HV0.3 and the corrosion behaviour was found to be superior in comparison to the other materials, exhibiting an inclination to passivation at around 300 mV.
机译:本文旨在研究沉积在1.0570钢基材上的钼热喷涂涂层的特点,并将它们与未涂层碳钢(1.0570)的特性进行比较,分别用于类似应用的合金钢(1.7219和1.6582)。随着温度下降至-100°C,飞机,地面运输等行业的零件和结构部件。通过金属金属化进行Mo涂层沉积,并旨在提高通常在铁路运输工业中应用的钢的耐磨和耐腐蚀性。对所有呈现的材料研究了显微硬度,磨损行为和耐腐蚀性。由于氧化物摩擦膜的形成,通过金属金属化技术沉积的钼涂层具有优异的摩擦行为。因此,目前研究的MO涂层的摩擦系数达到0.65的值,与低磨损率为约0.65t0〜(-5)mm〜3 n〜(-1)m〜(-1)。发现Mo涂层的孔隙度为约3.50%,这类涂层的共同值。 Mo涂层的显微硬度平均值为480 HV0.3,与其他材料相比,发现腐蚀行为优异,表现出与钝化约为300mV的钝化。

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