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随着氧气顶吹转炉炼钢生产能力的不断提高,扩大转炉钢品种已成为当前急待解决的重要课题。根据冶金部指示,为充分发挥地方中小型企业氧气顶吹转炉和φ76毫米无缝钢管轧机的生产能力,扩大转炉钢品种,用转炉钢代替平炉钢,逐步地做到各省地方中小企业管坯的自给,决定在南京钢铁厂15吨氧气顶吹转炉上试炼一批20号管坯钢,进行经φ650毫米轧机轧制成φ75毫米管坯后,由无锡钢厂φ76毫米无缝钢管轧机轧制并冷拔成无缝钢管的试验。采用氧气顶吹转炉冶炼—φ650毫米轧机轧制成φ75毫米管坯—φ76毫米无缝钢管辅机轧制并冷拔的工艺线生产无缝钢管,冶
As the oxygen top blown converter steelmaking production capacity continues to increase, expanding the converter steel varieties has become an important issue to be solved urgently. According to the instructions of the Ministry of Metallurgy, in order to give full play to the production capacity of small and medium-sized local oxygen top-blown converter and φ76 mm seamless steel pipe rolling mill, expand the varieties of converter steel and use converter steel instead of open hearth steel, Self-sufficiency, decided to test a batch of 20 # billet steel on a 15-ton oxygen top-blown converter in Nanjing Iron and Steel Mill and rolled it into φ75 mm seamless steel tube by φ650 mm mill and rolled from φ76 mm seamless steel tube mill in Wuxi Steel Works Cold drawn and seamless steel pipe test. Oxygen top-blown converter smelting-φ650 mm mill rolling φ75 mm tube - φ76 mm seamless steel pipe auxiliary cold rolling and cold drawing of the production line of seamless steel pipe, steel