对目前采用未强化状态的内燃机车汽缸套提出了高的使用性能要求,此要求以它们的强化作为必要条件。可以用渗铬、渗氮和其它整体或表面常规热处理方法提高汽缸套的耐磨性。但是,工艺过程的劳动量、汽缸套的变形和必需的大机加工裕量等,使上述方法难于采纳。大家都知道,用激光强化处理就可以局部地排除这些缺点。可以认为,采用激光淬火来提高柴油机汽缸套的使用寿命是很有前途的。汽缸套的工作能力首先取决于它的耐磨性和抗疲劳断裂性能。由于这个原 The current use of unconfined diesel locomotive cylinder liner put forward high performance requirements, which require their strengthening as a prerequisite. It is possible to improve the wear resistance of cylinder liners by chromizing, nitriding and other general or surface conventional heat treatment methods. However, the amount of labor in the process, the deformation of the cylinder liner and the necessary large machining allowance make the above method difficult to adopt. We all know that the laser processing can be partially ruled out these shortcomings. It can be considered that the use of laser quenching to improve the life of diesel cylinder liner is very promising. The ability of a cylinder liner to work first depends on its wear resistance and fatigue fracture resistance. Because of this original