【作者】 段大波； 孙彦辉； 白雪峰； 秦哲； 朱经涛； 严进宝； 戴开发；

【Author】 DUAN Dabo;SUN Yanhui;Bai Xuefeng;QIN Zhe;ZHU Jingtao;Yan Jinbao;DAI Kaifa;School of Metallurgical and Ecological Engineerings University of Science and Technology Beijing;Shandong Rizhao Iron and Steel Co.,Ltd.Ltd.;

【机构】 北京科技大学冶金与生态工程学院； 山东省日照钢铁有限公司；

【摘要】 本文研究了SPHD冷轧冲压用钢生产过程中各个工序总氧T[O]、[N]以及夹杂物的形貌和成分的变化情况。冶炼过程中夹杂物的演变规律主要为Al₂O₃→MgO-Al₂O₃→MgO-Al_2O3-CaO→MgO·Al₂O₃-CaO-CaS和Al₂O₃→Al₂O₃-CaO→Al₂O₃-CaO-CaS两种途径。并对钢中硫化钙夹杂物的形成热力学进行分析得到,在炼钢过程中,[S]的质量分数小于0.014%时钢中不会生成CaS夹杂,[Ca]的质量分数在0.042%以上时,钢中才会出现纯的CaS夹杂。更多还原

【Abstract】 This paper studies the SPHD cold rolled steel in the production process of each process T[O]、[N]as well as the change of the morphology and composition of inclusions.The evolution rules of the inclusions in the refining to the casting process are mainly Al₂O₃→MgO-Al₂O₃→MgO-Al₂O₃-CaO→MgO-Al₂O₃-CaO-CaS and Al₂O₃→Al₂O₃-CaO→Al₂O₃-CaO-CaS.The thermodynamics of the formation of calcium sulfide inclusions in steel was analyzed.concluded that the CaS inclusion is not formed in the steel when the mass fraction of[S]is less than 0.014% in the steelmaking process.更多还原