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钢中非金属夹杂物绝大多数为较低熔点夹杂物,可以显著改善钢材的抗疲劳破坏性能。对炉渣-钢液-夹杂物间相互作用进行了实验室研究,发现钢中MgO-Al2O3系高熔点夹杂物的比率随渣-钢反应时间增加而减少,与Al2O3的质量分数为20%和CaO/SiO2约为5的炉渣相比,采用Al2O3的质量分数为41%和CaO/SiO2约为6.5的炉渣,CaO-MgO-Al2O3-SiO2系夹杂物的比率由24.3%增加至81.7%,大多数夹杂物位于较低熔点成分区域(≤1 500℃)。
Non-metallic inclusions in steel for the vast majority of lower melting point inclusions, can significantly improve the anti-fatigue properties of steel. The laboratory study on the interaction between slag-molten steel and inclusions found that the ratio of MgO-Al2O3-based high-melting inclusions in steel decreases with the increase of slag-steel reaction time, and the content of CaO / SiO2 is about 5, the content of CaO-MgO-Al2O3-SiO2 inclusions is increased from 24.3% to 81.7% compared with the slag with Al2O3 of 41% and CaO / SiO2 of about 6.5, and the majority Inclusions are located in the lower melting point region (≤1,500 ° C).