28MnCr5齿轮钢冶炼过程中成分变化分析  

CHEMICAL CONTENT CHANGE ANALYSIS OF 28MnCr5 GEAR STEEL DURING SMELTING PROCESS

作　　者：吴德发[1] 梁娜[1] 李金举[1] 

机构地区：[1]莱芜钢铁集团有限公司,山东莱芜271104

出　　处：《冶金丛刊》2013年第5期7-10,26,共5页Metallurgical Collections

摘　　要：基于莱钢特钢事业部50t电炉生产28MnCr5的冶炼过程，分析了不同成分在冶炼过程中五个不同阶段的变化规律。结果表明：电炉出钢时碳含量控制在0．2％左右，精炼时碳含量控制在0．22％～0．25％范围内，可使28MnCr5钢的碳含量实现窄成分控制；磷含量的变化主要集中在电炉冶炼和出钢的过程，后期会有少许回磷现象；Mn、Cr、S、Si等元素的精确控制主要在LF和VD阶段。In this paper, various chemical content change regularities in 5 different stages are studied during the smelting process of 28MnCr5 at 50 tons electric furnace production line in Laiwu Steel Special Steel Division. The results showed that ： if carbon content is controlled at about 0.2% at the time of electric arc furnace tapping, between 0.22% and 0.25% at the end of refining, then carbon content in 28MnCr5 steel can achieve a narrow content control; the phosphorus content change mainly happens during smelting and tapping process, there will be a little rephosphorization phenomena during late stage; the precise content control of Mn, Cr, S, Si is mainly carried out during LF and VD stage.

关 键 词：28MnCr5 冶炼 成分 含量变化 

分 类 号：TF714.3[冶金工程—钢铁冶金]