S20A钢是碳素钢。在生产中、曾遇到的主要质量问题是大圆的横向冲击值经常达不到技术条件要求。为了提高横向α_κ值,通常采用了两个途径,一是控制合适的碳含量,尽量降低钢中的硫含量。二是控制钢中硫化物形状。在S20A生产实践中,证实了钢中硫含量对S20A钢横向冲击值有很大影响,随着硫含量的降低,横向α_κ值显著提高。所以在目 S20A steel is carbon steel. In production, the major quality problems encountered have been the large circle of lateral impact values ​​often do not meet the technical requirements. In order to improve the lateral α_κ value, two approaches are usually adopted. One is to control the appropriate carbon content and minimize the sulfur content in the steel. Second, control the shape of sulfide in steel. In the S20A production practice, it was confirmed that the sulfur content in steel had a great influence on the transverse impact value of S20A steel. As the sulfur content decreased, the lateral α_κ value increased significantly. So in the eyes