论文部分内容阅读
采用脉冲激光在碳素结构钢试件表面加工出凹坑织构,测试了激光凹坑边缘的硬度,通过销盘磨损实验,分析激光凹坑试件表面的摩擦磨损特性,观察了磨损表面形貌,并与普通试件进行了对比。结果表明:激光加工试件的凹坑边缘硬度提高,磨损量降低。激光加工凹坑表面的磨损机制以磨粒磨损为主。激光凹坑边缘硬质点的支撑和保护作用,以及凹坑的磨屑存储作用,减少了激光凹坑试件的磨粒磨损程度。激光凹坑织构改变了摩擦副之间的接触性能,减少黏着结点的形成概率,可以降低黏着磨损。激光加工凹坑表面具有降低磨粒磨损和黏着磨损的作用,从而提高激光凹坑织构试件表面的耐磨性。
The texture of pits on the surface of laser pits was machined by pulsed laser, the hardness of laser pits was tested. The friction and wear characteristics of laser pits on the surface of pits were analyzed by pin-plate wear test. Appearance, and compared with the ordinary specimen. The results show that the hardness of the concave edge of the laser processing specimen increases and the wear loss decreases. The wear mechanism of laser processing dimple surface is abrasive wear. The support and protection of the hard spots on the edge of the laser pits and the wear debris storage of the pits reduce the abrasive wear of the laser pits. The laser dimple texture changes the contact performance between the friction pairs, reduces the probability of formation of adhesive nodes and can reduce the adhesive wear. Laser processing of the pit surface has the effect of reducing abrasive wear and adhesive wear, so as to improve the wear resistance of the surface of the laser pit textured test piece.