弹簧钢连铸坯中心偏析的研究

来源期刊：钢铁2010年第1期

论文作者：蒋丽红 田乃媛

文章页码：43 - 45

关键词：弹簧钢； 真空精炼； 过热度； 中心偏析

Key words：spring steel； vacuum refining； superheat； central segregation

摘    要：为了探讨真空精炼和过热度对弹簧钢连铸坯中心偏析的影响,采用两种生产工艺:转炉→LF→VD→连铸和转炉→LF→连铸,并取不同的过热度(30℃和22℃),生产60Si2 Mn弹簧钢连铸坯。在矩形坯上取样分析碳和硫的偏析情况,并进行对比。其结果是:经过真空精炼,连铸坯的碳偏析指数从1.72降低到1.28;硫偏析指数从2.68降低到1.68。

Abstract: In order to discuss the effects of vacuum refining and superheat on spring steel bloom centerline segregation,two production processes are introduced,one is converter→LF→VD →continuous casting,the other is converter →LF→continuous casting.Different degrees of superheat at 30 ℃ and 22 ℃ were separately adopted to produce 60Si2Mn spring steel bloom.Two samples were taken in spring steel bloom,and the segregation of element C and S were analyzed.The results show that after vacuum refining,the biggest carbon segregation index dropped to 1.28 from 1.72,and the largest sulfur segregation index dropped to 1.68 from 2.68.