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1 前言提高汽车零部件强度方法之一,一般是使用表面化学热处理,目前在汽车工业上应用的主要是PX气体气氛热处理法。这种方法用于渗碳淬火及软氮化等广泛领域,但在渗碳淬火方面存在不能抑制生成表面异常层的质量问题。另一方面市场要求提高汽车驱动性能和持久可靠性的呼声日高,为此就要求其强度更进一步提高。在这方面还必须努力降低成本及改善操纵烟火的作业环境。因此,我们为适应上述三方面的需要,
1 Introduction One of the ways to improve the strength of automotive components, the general use of surface chemical heat treatment, the current application in the automotive industry is mainly PX gas atmosphere heat treatment method. This method is used in a wide range of fields such as carburizing and nitrocarburizing. However, there is a problem that carburizing and quenching can not suppress the quality of surface abnormal layer formation. On the other hand, the market calls for higher driving performance and long-lasting reliability of vehicles, so the intensity of the vehicle needs to be further improved. In this regard, efforts must also be made to reduce costs and improve the operating environment for the control of fireworks. Therefore, in order to meet the above three needs,