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1. 发明专利

JP2007229736A Vertical type continuous casting method of large cross section cast slab for thick steel plate 有权
标题翻译：大型横截面垂直式连续铸造方法厚钢板
公开(公告)号：JP2007229736A
公开(公告)日：2007-09-13
申请号：JP2006052162
申请日：2006-02-28
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MIZOGUCHI TOSHIAKI , UEJIMA YOSHIYUKI , KONDO KATSUMI , MIKI DAISUKE , OGAWA KAZUO
IPC分类号： B22D11/00 , B22D11/04 , B22D11/10 , B22D11/115
摘要： PROBLEM TO BE SOLVED: To provide a vertical type continuous casting method with which the grain diameter of equiaxed crystal generated at the center part of a large section cast slab for thick steel plate having ≥380 mm thickness of the cast slab, is made fine to attain improvement in the toughness.
SOLUTION: When the large section cast slab for thick steel plate having ≥380 mm thickness of the cast slab, is cast at ≤0.2 m/min casting speed with the vertical type continuous caster, the position of an immersion nozzle 2 for pouring molten steel into a mold 1 is shifted to the center of the mold and set to the substantial center part to the thickness of the cast slab to cast the molten steel. In this way, the molten steel pouring flow is uniformly collided with the standard surface side and the shifting surface side and the many nuclei of the equiaxed crystals are generated and the grain diameters of the equiaxed crystals are made fine and the toughness can be improved.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种垂直型连续铸造方法，其中在铸坯厚度≥380mm的厚钢板的大型铸坯的中心部分产生的等轴晶体的晶粒直径为使韧性得到改善。
解决方案：当铸件厚度≥380mm的厚钢板的大型铸造板坯与垂直型连铸机以不到0.2m / min的铸造速度铸造时，浸入式喷嘴2的位置为将钢水浇注到模具1中移动到模具的中心，并将其设置到铸坯的大致中心部分以铸造钢水。以这种方式，钢水浇注流与标准表面侧和变位面一致地发生，并且产生等轴晶体的许多核，并且等轴晶体的晶粒直径变细，并且可以提高韧性。版权所有（C）2007，JPO＆INPIT

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