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在吨级双辊连铸技术中,为了确保长时间的稳定铸造和薄带的尺寸精度及表面质量,延长冷却辊的寿命,特别是防止铸造中发生的辊子裂纹是一个重要的课题。川崎钢铁公司技术研究所行本正雄等为了弄清在铸造中发生的冷却辊表面微细裂纹的发生机制,测量了辊子表面和内部的温度,进行了二维传热应力计算。而且为了防止开裂,对辊子表面的电镀层和套筒材质重新作了评价,还试验了辊子内部水冷的强化。 试验用双辊装置中,钢液是用滑动水口
In the ton-level two-roll continuous casting technology, it is an important issue to prolong the life of the cooling roll, especially to prevent the occurrence of roll cracks in casting, in order to ensure dimensional stability and surface quality of stable casting and ribbon for a long time. In order to clarify the mechanism of the occurrence of fine cracks on the surface of the cooling roll during casting, Benjiro Masao et al. Measured the surface and internal temperature of the roll and calculated the two-dimensional heat transfer stress. Moreover, in order to prevent cracking, the plating layer and the sleeve material on the surface of the roller were newly evaluated, and the water-cooling enhancement inside the roller was also tested. Two-roll test device, the molten steel is to use sliding nozzle