10.3969/j.issn.1003-8620.2015.02.011
SWRCH35K冷镦钢120 t BOF-吹氩-LF-CC流程的冶炼工艺和质量控制
通过KR铁水预脱硫[S]≤0.008%,BOF预脱氧加铝量由0.010%~0.025%提高到0.020%~0.035%,LF精炼时加Fe-Ca丝由3.0 m/t增至4.0m/t,LF精炼时间≥35 min,白渣≥15 min,改进中间包结构,控制中间包钢水温度1 520 ~1 540℃,M-EMS电流由160 A提高至200 A,改善二次段喷雾冷却,控制拉速2.2~2.4m/min等工艺措施,生产的SWRCH35K冷镦钢(/%:0.29 ~0.31C,0.07 ~0.11Si,0.69 ~0.71Mn,0.009~0.010P,0.008S,0.038~0.041Al) 160 mm×160 mm铸坯的碳偏析指数≤1.06,Φ6.5~20 mm热轧盘条组织为P+F,用其生产的8.8级及以上的标准件,免退火后模具损耗率仅约为8.5%.
120 t BOF-吹氩-LF-CC流程、SWRCH35K冷镦钢、盘条、精炼渣、中间包结构、夹杂物、冶金质量
36
TF7;TG2
2015-04-23(万方平台首次上网日期,不代表论文的发表时间)
共4页
40-43