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机车车辆和线路上部结构零件的大量生产，要求采用费用最少而又有效的强化方法。因此，必须寻求提高铁路运输零件使用寿命的途径。机器零件的有效热强化方法之一是整体表面淬火。这种方法的实质是用连续通道式加热炉或井式护或感应淬火加热及随后进行激烈的淬火冷却。在这种情况下，所用钢的淬透性应与强化层的厚度相适应，以保证零件截面的硬度梯度，即保证有很高的表面硬度和韧性芯部。这同样也产生了良好的内应力图，并且可保证零件有很高的运用疲劳寿命。本文根据铁路运输零件的生产和运用特点探讨了采用整体表面淬火的可能性。
The mass production of rolling stock and the superstructure parts of the lines requires the least expensive and effective strengthening method. Therefore, we must seek ways to improve the service life of railway transportation parts. One of the methods of effective thermal hardening of machine parts is the overall surface hardening. The essence of this method is continuous channel furnace or pit or induction quenching followed by intense quench cooling. In this case, the hardenability of the steels to be used should be adapted to the thickness of the reinforcement so as to guarantee a hardness gradient of the part cross-section, ie a high core hardness and toughness. This also produces a good internal stress map, and can guarantee the parts have a high fatigue life. Based on the characteristics of the production and application of railway transportation parts, this paper discusses the possibility of using the overall surface hardening.