唐钢超薄热轧带钢生产线的质量控制技术

介绍了唐钢FTSR超薄热轧带钢生产线的工艺流程，以及代表其技术特色的H^2结晶器、动态液芯压下、动态PC控制、半无头轧制、铁素体轧制等新技术。认为：H^2结晶器与普通漏斗型结晶器相比，坯壳所受的应力大大降低，不易产生裂纹；优化的辊列设计及动态液芯压下技术确保了铸坯的内部质量；半无头轧制解决了超薄带钢直接穿带和甩尾困难的难题；动态PC和工作辊弯辊技术相互配合，保证了产品质量的稳定；而三点除鳞，尤其是粗轧和精轧之间设中间冷却装置，不仅可以改善板带表面质量，也为实现精轧在铁素体状态下轧制提供了条件。

Quality Controlling Techniques in Ultra- thin Hot Strip Production Line of Tangshan Iron and Steel Co. Ltd

The advanced techniques of ultra-thin hot strip production line at Tanggang were introduced, which include H~2 mould,dynamic soft reduction,dynamic PC control,semi-endless rolling,ferrite rolling etc. The production survey shows that the stresses in the shell in H~2 mould are less than in general funnel mould, so there are less cracks in the shell. Optimized roller line device and dynamic soft reduction ensure the internal quality of billet. Semi-endless rolling solves the problem of the strips polling and swing. Dynamic PC control and working bending roll guarantees the stability of the strip's quality. The three-point descaling, especially about the intermediate cooling system between roughing mill and finishing mill, can not only improve the strip surface quality but also support the rolling in ferrite area.