莱钢特钢事业部新区采用铁水+废钢-100 t电弧炉-LF-VD-Φ500,600 mm圆坯连铸-步进式加热炉-950轧机轧制-缓冷-退火的流程生产Φ110~260 mm AISI4145HM钢(/%:0.44~0.46C,0.21~0.23Si,1.32~1.33Mn,1.18~1.20Cr,0.30~0.31Mo,0.16~0....莱钢特钢事业部新区采用铁水+废钢-100 t电弧炉-LF-VD-Φ500,600 mm圆坯连铸-步进式加热炉-950轧机轧制-缓冷-退火的流程生产Φ110~260 mm AISI4145HM钢(/%:0.44~0.46C,0.21~0.23Si,1.32~1.33Mn,1.18~1.20Cr,0.30~0.31Mo,0.16~0.17Ni,≤0.012P,≤0.004S,≤0.05Cu,0.15~0.35Alt)。通过控制电弧炉终点[C]≥0.15%,[P]≤0.008%,出钢预脱氧和合金化,LF高铝精炼渣(30%~40%Al_2O_3)及喂0.45kg/t_钢钙线,VD后梯度软吹,控制中间包钢水过热度12~25℃,拉速0.25~0.35 m/min,全程保护浇铸及M-EMS和F-EMS,轧后缓冷、退火等工艺措施,生产的铸坯低倍组织良好,中心疏松和中心缩孔≤1.0级,裂纹和皮下气泡为0级,各类夹杂物级别≤1.5,级别总和≤7.0,钢的各项指标均满足协议要求。展开更多