9Cr5Mo轧辊钢Φ500 mm连铸坯的生产实践

Production Practice of 9Cr5Mo Roll Steel Φ500 mm Continuous Casting Billet

莱钢特钢事业部新区采用铁水+废钢→100 t电炉→双工位LF→双工位VD→圆坯连铸的流程生产Φ500 mm轧辊用钢9Cr5Mo。通过优化冶炼工艺、调整精炼渣系、强化保护浇注等措施,使9Cr5Mo钢的化学成分、低倍以及非金属夹杂物等各项指标均满足用户要求。

The roll steel 9CrSMo was produced by the process of hot metal＋ scrap→100 t EAF →double-position LF→doubleposition VD→Ф500 coneasting round billet in Laiwu Steel. The difficulties that existed in the actual production of 9CrSMo can be overcome with the methods of the reinforcement smelting process, adjusting the refining slag, strengthen protective casting and so on. So the chemical composition, macrostructure, non-metallic inclusions rating and other indicators of the 9CrSMo can meet the customer requirements.