This paper reviews the present status and developing trend of carburizing steels used for automotive gears in domestic and abroad and the new heat treatment process related to the new type of steels.

综述了国内外汽车齿轮用渗碳钢的现状和发展趋势以及与新钢种相配合的新的热处理工艺。

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Higher quality steels have been required since train speeded-up, resulting in some problems such as the quality and type of ferroalloys.

火车提速后，对钢材质量提出了更高的要求，从而引发了铁合金的质量和品种问题。

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According to our domestic resources, the author has researched new-type kinds of steels and improved their mechanical and other properties by developing and adopting new materials and technologies.

其中包括建立符合国内资源条件的新钢种研究，以及通过研制和采用新材料和新技术等多种途径提高钢的力学性能的研完。

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