超低碳烘烤硬化钢固溶碳质量分数控制技术  

Process control for solute carbon mass fraction in ultra-low carbon baking hardened steel

作　　者：郭亮 黄财德 关顺宽 陈玉鑫 

机构地区：[1]首钢京唐钢铁联合有限责任公司制造部,河北唐山063200

出　　处：《中国冶金》2017年第8期23-27,共5页China Metallurgy

摘　　要：为了获得具有合适烘烤硬化值(简称BH值)的钢板,烘烤硬化钢冶炼过程中必须控制好固溶碳质量分数。介绍了首钢京唐公司超低碳烘烤硬化钢开发过程中有关固溶碳窄成分(±0.000 3%)的工艺控制技术,稳定控制固溶碳质量分数的关键措施包括:通过控制好精炼脱碳时间来控制精炼结束碳质量分数;使用低碳合金调整钢水合金质量分数以控制脱碳后合金增碳0.000 1%~0.000 2%;使用低碳(w([C])≤0.5%)耐火材料,控制好精炼结束到中间包的增碳。采取措施后,中间包熔炼成分中碳质量分数的稳定性得到大幅提高,固溶碳质量分数w([C])sol偏差±0.000 3%的合格率由66%提高到81%。To obtain the ultra-low carbon steel with the proper BH value,the solute carbon mass fraction must be controlled during the production of the baking hardened steel.The process control technologies of the narrow component control of the solute carbon mass fraction（±0.000 3%）in the development process of the ultra-low carbon steel in Shougang Jingtang Company were introduced.The key measures for the stability control of the solute carbon included controlling the decarburization time during the refining process to control the carbon mass fraction at the end of refining,adjusting the alloy mass fraction in steel by using the low carbon ferroalloys to make the recarburization in a range of 0.000 1%～0.000 2%,and using the low carbon（w（[C]）≤0.5%）refractory materials to control the recarburization in tundish.After all the actions taken,the stability of the carbon mass fraction in tundish was greatly improved,and the hit-rate of the solute carbon with the deviation of±0.000 3%increased from 66%to 81%.

关 键 词：BH钢 固溶碳 覆盖剂 长水口 增碳 

分 类 号：TF76[冶金工程—钢铁冶金]