海水润滑条件下40Cr钢的冲击磨损实验研究

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The damage behaviors of 40Cr steel with briny lubrication were Studied using a self-made impact test rig, the SEM and the surface topography instrument. The results indicate that the surface of the material has undergone plastic de- formation and wear, and plastic deformation appears in each stage of impact. With the impact times increasing, the depth and volume of the impact dent are increased. Compared with the dry condition, the sea water can restrain impact wear effectively while cause the dent damaged by Corrosion. With impact load increasing, the degree of corrosion is enhanced. Under same impacting time, the larger depth and volume of impact dent are produced under briny lubrication compared with under BS05 oil lubrication.使用冲击磨损试验机、扫描电镜及表面形貌仪研究冲击载荷作用下40Cr钢在海水润滑工况下的表面损伤行为。结果发现，冲击使材料表面发生了塑性变形和磨损，塑性变形存在于冲击的每一阶段；冲击凹坑深度及体积随冲击次数的增加呈增大趋势；相比干接触条件，使用海水润滑可有效抑制冲击磨损，但会对冲击凹坑表面造成一定的腐蚀，并且该腐蚀程度随载荷的增加而增强；相同冲击次数条件下，海水润滑时的冲击凹坑深度和体积大于BS05润滑油润滑时的凹坑深度和体积。