【摘要】 介绍了武汉钢铁(集团)公司LD→RH→CC工艺生产的DC06和DC04冷轧深冲钢中T.O、N及夹杂物含量的变化情况。在RH合金化3 min、精炼结束、中包和铸坯中T.O质量分数,DC06钢为77.08×10-6、44.98×10-6、44.38×10-6和24.23×10-6;DC04钢为69.35×10-6、41.55×10-6、38.05×10-6和23.55×10-6。氮含量在RH精炼过程略有降低,在浇铸过程略有增氮。RH处理和浇铸过程中夹杂物去除率,DC06钢为44.0%和32.7%;DC04钢为24.4%和12.1%,铸坯中单位面积的显微夹杂物在距铸坯内弧侧1/4处较多。提出了控制夹杂物的措施,对武钢冷轧深冲用洁净钢的生产有一定的指导意义。更多还原

【Abstract】 The present paper introduces the content variation of T.O and N and inclusions in the cold rolled and deep-drawn steel DC06 and DC04 in refining the steel grade with LD→RH→CC route.The T.O mass fraction of DC06 through three minutes of RH alloying treatment is 77.08×10-6 and 44.98×10-6 in the end of refining and 44.38×10-6 in tundish and 24.23×10-6 in slab;that of DC04 is 69.35×10-6、41.55×10-6、38.05×10-6 and 23.55×10-6 respectively.In the process of RH refining N content is slightly reduced and in the pouring N pick-up occurs to some extent.In the RH treatment and in the pouring the inclusion removal rate of DC06 is 44.0% and 32.7% respectively;and that of DC04 is 24.4% and 12.1%.In the location away from distance of a quarter of inside arch of the slab there are more micro inclusions of the unit area of the the slab than in other area.And this paper puts forward some control measure of the inclusions,it has great significance for production of clean steel.更多还原