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本文在相同条件下对激光相变硬化处理、淬火-回火及未经处理的45~#碳钢的磨损特性进行了对比试验研究。结果表明,激光相变硬化处理明显地提高了材料表面的抗粘着和抗擦伤能力,因而可以使其在一定负荷和往复速度下的耐磨性能提高一个数量级。往复速度(频率)、负荷对激光相变硬化层和淬火-回火试样之磨损率的影响不同:淬火-回火试样的磨损率随着负荷的增大而迅速增大,但相变硬化层在负荷低于294N时的磨损率增加十分缓慢,只有当负荷超过294N之后才迅速增大;淬火-回火试样的磨损率是随往复频率的增大而迅速降低,而相变硬化层的磨损率随着往复频率的增大却是先上升而后下降,但其量值的变化较小,当往复频率高于每分钟500次时,二者的磨损率基本相同。
In this paper, under the same conditions of laser phase hardening hardening, quenching - tempering and untreated 45 ~ # carbon steel wear characteristics of a comparative study. The results show that the laser phase transformation hardening process obviously improves the anti-adhesion and anti-abrasion ability of the material surface, which can improve the wear resistance of the material by an order of magnitude under certain load and reciprocating speed. The reciprocating speed (frequency) and load have different effects on the wear rate of the laser transformation hardened layer and the quenched-tempered specimen: the wear rate of the quenched-tempered specimen increases rapidly with the increase of load, but the phase transformation The wear rate of the hardened layer increases very slowly when the load is lower than 294N, only increases rapidly when the load exceeds 294N; the wear rate of the quenched-tempered sample decreases rapidly with the increase of the reciprocating frequency, and the phase change hardens The wear rate of the layer increases and then decreases with the increase of the reciprocating frequency, but the change of its value is small. When the reciprocating frequency is higher than 500 times per minute, the wear rate of the layer is basically the same.