我国φ650三辊开坯机的现状及改造方向

PRESENT SITUATION AND DIRECTION FOR RENOVATION OF φ650 mm 3-HIGH BLOOMERS IN CHINA

论述了具有中国特色的φ650～550 mm三辊开坯机的发展及现况,提出了全国100余套这类轧机的改造方向。认为采用矩形断面连铸坯和钢锭,取代传统的方形断面钢锭,同时将平平一立立共轭箱型孔改造为立立—平平孔型系统,并用计算机加以优化,可以取得改进钢锭和连铸坯内部质量、提高成坯率、降低综合能耗、减少断辊等综合经济效益,是企业增产挖潜的一个良好途径。文中例举了改造的实例,可供有关厂矿参考。

The paper introduces the development of blooming with φ650～550 mm 3-high bloomers and the renovating direction for more than 100 sets of such existing machines. By using rectangular ingots instead of traditional square ones, and replacing H-H-R-R pass system with R-R-H-H, the following benefits can be gained: improving inner quality billets and metal yield; reducing energy consumption; decreasing roll-breakage rate. Some renovating projects are given as reference for related plants.