【摘要】 对GCr15钢进行了氧含量分析、夹杂物评级和电子探针观察,研究了喂钙-硅线对铝脱氧并真空脱气后钢中氧含量及夹杂物的影响。结果表明:铝脱氧的GCr15钢经LF和VD炉真空脱气(精炼)后再喂钙-硅线,其氧含量和D类点状夹杂物级别与未喂钙-硅线的相比没有明显的差别;为解决连铸水口堵塞问题可喂钙-硅线;GCr15钢采用CaO-SiO2-Al2O3渣系精炼,可形成粒状铝酸钙夹杂物,其外表面常常吸附一层CaS。更多还原

【Abstract】 The effect of Ca-Si wire feeding on oxygen content and inclusion in Al-deoxidized and vacuum degassed GCr15 steel was investigated by oxygen content analysis,inclusions rating and electron probe observation.The results show that there was no further effect on oxygen content and D-type inclusion between Al-deoxidized and vacuum degassed GCr15 steel with Ca-Si wire feeding after LF and VD secondary refining and Al-deoxidized GCr15 steel without Ca-Si wire feeding.The problem of nozzle clogging during continuous casting could be solved by feeding Ca-Si wire.Granular calcium-aluminates wrapped by a layer of calcium sulfide were formed in GCr15 steel treated by refining slag of CaO-SiO2-Al2O3.更多还原