强化研磨时间对GCr15轴承钢干摩擦性能的影响

Effect of Strengthened Grinding Time on Dry Friction Properties of GCr15 Bearing Steel

为研究不同强化研磨加工时间下GCr15轴承钢的干摩擦性能,首先采用强化研磨机对GCr15轴承钢板进行不同喷射时间的强化研磨加工,采用显微硬度计测量了不同强化研磨时间下样品的截面显微硬度;利用超景深显微镜观察了强化层的厚度和磨痕的表面形貌;利用往复式摩擦磨损实验机对不同强化研磨时间下的GCr15轴承钢样品进行40 N和80 N载荷下的干摩擦磨损实验。研究结果表明:随着强化研磨加工时间的增加,材料表面的显微硬度逐渐增大;表面强化层的厚度与加工时间成正比;样品的摩擦系数和磨损量与强化研磨加工时间成反比。在相同载荷条件下,强化研磨加工时间越长,轴承钢的干摩擦系数越低,磨损量越小,干摩擦性能越好。

In order to study the dry friction properties of GCr15 bearing steel under different duration of strengthened grinding treatment.Firstly,strengthened grinding processing of GCr15 bearing steel plate with different injection time was carried out by strengthened grinding device,and the microhardness of the sample section under different strengthened grinding time was measured by a microhardness tester.The thickness of the strengthened layer and the surface morphology of the wear were observed by super depth of field microscope.Dry friction and wear experiments of GCr15 bearing steel samples under different strengthened grinding duration were carried out by using a linear reciprocating friction and wear tester under load of 40 N and 80 N.The results show that the microhardness of the material surface increases with the increase of the strengthened time.The thickness of the strengthened layer on the surface of the material is proportional to the processing time.The friction coefficient and mass loss of the sample are inversely proportional to the time of strengthened grinding.Under the same loading conditions,the longer the grinding time,the lower the coefficient of dry friction,the smaller the mass loss,and the better the friction performance of bearing steel.