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美国中兴钢厂1号大型板坯连铸机,始建于60年代末期,是美国第一台大板坯连铸机,也是世界上最大的板坯连铸机之一。由于该机设备老化,长期以来浇铸的铸坯存在着严重的中心线裂纹和表面横向裂纹。为此,由西安重型机械研究所技术总负责、上海重型矿山机械公司承包制造,对该厂1号板坯连铸机进行了更新改造。工程分两期进行,分别于1992年2月26日和7月20日一次试浇成功。截至今年7月,已浇钢12万吨以上。铸坯质量显著提高,铸坯中心线裂纹和内部裂纹已经消失,板坯外弧侧的表面横向裂纹也已消失,内弧侧的表面横向裂纹也有了显著改进。由于铸坯表面缺陷造成的铸坯重量损失平均降低了2.6％,浇铸速度提高了16％。若年产铸坯按30万
One of the largest slab caster in the United States, the largest slab caster in the United States, was founded in the late 1960s. Due to the aging of the machine equipment, the cast slab has been for a long time there are serious centerline cracks and surface transverse cracks. To this end, Xi’an Heavy Machinery Research Institute of Technology is responsible for the total, Shanghai Heavy Mining Machinery Company contracted manufacturing, the plant No. 1 slab caster was updated. The project was carried out in two phases, with a trial pouring on February 26 and July 20, 1992, respectively. As of July this year, more than 120,000 tons of steel have been poured. The slab quality is significantly improved, the central line crack and internal crack of the slab disappear, the surface lateral crack on the outer arc side of the slab also disappears, and the transverse crack on the inner arc side also has been significantly improved. As a result of slab surface defects caused by an average slab weight loss decreased by 2.6%, the casting speed increased by 16%. If the annual output of slab by 300,000