结合鞍钢新建 1780 mm热连轧带钢机组 ,介绍了当代热连轧带钢机组的最新设备之一——定宽压力机组的组成、作用、结构和技术特征。通过具体实例 ,论证了定宽压力机的设置 ,不仅提高了钢材的收得率 ,而且大大减少了板坯连铸机的浇铸宽度规格 ,从而提高了板坯连铸机的生产能力 Combined with the new 1780 mm hot strip mill at Anshan Iron and Steel Company, introduced the composition, function, structure and technical characteristics of the constant width pressure unit, one of the latest equipment of contemporary hot strip rolling unit. The concrete example shows that the setting of constant-width press not only improves the yield of steel, but also greatly reduces the casting width specification of slab caster and increases the production capacity of slab caster