热轧板生产工艺的发展可以分为两大类:即厚板坯常规热轧板生产工艺和薄板坯连铸连轧生产工艺,其中薄板坯连铸连轧进一步发展为中等厚度板坯连铸连轧工艺。厚板坯一般厚度为200～300mm,薄板坯和中等厚度板坯厚度一般界定为50～70mm(包括90mm经软压下到70mm)和90～150mm。铸坯厚 The development of hot-rolled sheet production process can be divided into two categories: the production process of conventional hot-rolled sheet thick slab and thin slab continuous casting and rolling production process, in which the thin slab continuous casting and rolling further development of medium-thickness slab continuous casting Continuous rolling process. Thick slabs generally have a thickness of 200-300 mm. Thicknesses of thin slabs and medium thick slabs are generally defined as 50-70 mm (including 90 mm by soft pressure down to 70 mm) and 90-150 mm. Slab thickness