本文分析和讨论了钢的晶粒度的传统显示方法以及影响显示晶粒效果的主要因素,提出了钢的晶粒度的氢气脱碳显示方法,并将氢气脱碳法与传统法做了对比试验。结果表明:采用氢气脱碳法显示的钢的晶粒大小和级别,除与传统的氧化法的晶粒大小相差一级之外,与传统的其他方法所显示的晶粒大小和级别无明显差异。 This paper analyzes and discusses the traditional display method of the grain size of steel and the main factors affecting the effect of the grain. The decarburization display method of the grain size of steel is proposed, and the hydrogen decarburization method is compared with the traditional method test. The results show that the grain size and grade of the steels displayed by the hydrogen decarburization method have no significant difference from the grain size and grade of the other traditional methods except for the difference of the grain size of the conventional oxidation method .