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高强汽车钢残余硼元素的控制实践

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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。
Control practice of residual boron element in high strength automotive steel
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.

high strength automotive steelresidual boron elementtype of alloynumber of ladle turn-over

王建兴、李建英、武冠华、张贺君、王耐、李经哲、蒋昭阳

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河钢集团唐山钢铁集团有限责任公司, 河北 唐山 063016

高强汽车钢 残余硼元素 合金种类 钢包周转次数

河北省自然科学基金资助项目

E2020318006

2022

天津冶金
天津冶金集团有限公司 天津市金属学会 天津市冶金科技信息研究所

天津冶金

影响因子:0.162
ISSN:1006-110X
年,卷(期):2022.(5)
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