高强汽车钢残余硼元素的控制实践
Control practice of residual boron element in high strength automotive steel
王建兴 1李建英 1武冠华 1张贺君 1王耐 1李经哲 1蒋昭阳1
作者信息
- 1. 河钢集团唐山钢铁集团有限责任公司, 河北 唐山 063016
- 折叠
摘要
针对唐山某钢厂生产的420MPa高强汽车钢残余硼元素含量超标（>10ppm）导致成品板性能偏低的问题，对炼钢过程中的铁水、合金料、辅料等进行成分检测，并对钢包周转使用状况进行了统计分析。本文根据成分检测及数据分析结果，确定了钢中残余硼元素含量异常增多的主要影响因素是使用合金种类及钢包周转次数，并提出了相应的工艺改进措施。通过优化所使用合金的种类和限定钢包周转次数，实现了高强汽车钢残余硼元素含量不大于10ppm的目标，在满足产品性能要求的同时降低了合金成本。
Abstract
In view of the problem that the residual boron element content of 420MPa high strength auto?motive steel produced by a steel plant in Tangshan exceeds the standard（>10ppm）, which leads to the low performance of the finished plate, the composition of molten iron, alloy materials and auxiliary materi-als in the steel-making process is detected, and the turnover and use situation of the ladle are counted and analyzed. In this paper, according to the results of composition detection and data analysis, the main factors affecting the abnormal increase of residual boron element content in steel are determined to be the type of alloy used and the number of ladle turnover, and process improvement measures accordingly are proposed. Through optimizing the type of alloy used and limiting the number of ladle turnover, the target that the residual boron element content of high strength automotive steel is not more than 10ppm is achieved，the alloy cost is reduced while meeting the product property requirements.
关键词
高强汽车钢/残余硼元素/合金种类/钢包周转次数Key words
high strength automotive steel/residual boron element/type of alloy/number of ladle turn-over引用本文复制引用
基金项目
河北省自然科学基金资助项目(E2020318006)
出版年
2022
NETL
NSTL
万方数据