不同冶炼工艺下硅镇静钢中夹杂物的研究

Study on Inclusions in Si Killed Steel in Different Smelting Processes

摘要: 本文以某厂硅镇静钢Q235B为研究对象，采用CaO-SiO2系渣洗料，开发LD-渣洗-CC冶炼硅镇静钢的冶炼新工艺。通过金相显微镜、扫描电镜和能谱等对夹杂物的观察和成分分析，可以看出渣洗工艺在夹杂物的大小、数量、形貌及成分上可以达到原LF工艺冶炼钢水平，可以替代LF工艺生产Q235B硅镇静钢，满足节约成本、节省时间、提高产量的企业要求。

Abstract: In this paper, Si killed steel Q235B is taken as the research object, and CaO-SiO2 slag washing ma-terial is adopted to develop a new smelting process of LD-slag washing-CC smelting Si killed steel. The inclusions were observed and the composition was analyzed by metallographic microscope, scanning electron microscope and energy spectrum. It can be seen that the slag washing process can reach the level of smelting steel in the original LF process in the size, quantity, appearance and composition of the inclusions. So slag washing process can substitute for LF process to produce Q235B Si killed steel. It can meet the enterprise requirement of saving cost, saving time and in-creasing output.