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日本钢管公司在京滨钢铁厂圆坯连铸设备上研究成功无缺陷圆坯生产技术。这项技术适用于碳素钢管至低合金钢所有钢种无缝钢管生产。因此,确立了全部圆坯产量的99%不经修整直接供给无缝管车间的生产体制。过去连铸机能生产断面积大的无缺陷板坯、方坯,但还不能生产这种无缺陷小断面坯。日本钢管公司京滨钢铁厂于去年12月设置了大量生产小断面圆坯的连铸机,并且在从精练到铸造的广泛领域内进行技术改造,
Nippon Steel Pipe Company in Keihin Steel Plant round billet continuous casting equipment to study the successful production of a defect-free round billet. This technology is suitable for the production of seamless steel pipe from carbon steel to low alloy steel. Therefore, it has been established that 99% of the total round billet output can be directly supplied to the production system of seamless pipe workshop without trimming. In the past, continuous casting machines were able to produce defect-free slabs and billets of large cross-sectional area, but still not capable of producing such defect-free small cross-sections. Japanese steel pipe company Keihin Steel Plant in December last year, set up a large number of production of small cross-section billet continuous casting machine, and from refining to casting a wide range of areas for technological innovation,