日本新日铁为了用双辊式连铸机稳定地生产高质量产品 ,采取了以下对策 :一是防止铸坯 (热带 )表面产生极细裂纹。为防止铸坯表面产生长度为 1～2 mm的极细裂纹 ,开发了铸造辊表面组织最佳化和长时间浇铸仍能保持这种组织的技术 ,从而确保了稳定生产无裂纹热带。另外 ,通过防止 Nippon Steel in order to use two-roll continuous casting machine stable production of high-quality products, has taken the following measures: First, to prevent slab (tropical) surface cracks produced. In order to prevent superfine cracks with a length of 1 to 2 mm on the slab surface, a technology has been developed that optimizes the surface texture of the casting rolls and maintains the structure for a long period of casting, thereby ensuring the stable production of a crack-free tropics. In addition, by preventing