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为提高初轧板坯成坯率,用铅试件在φ180二辊可逆轧机上,以1:9的相似比研究了扁钢锭的变形规律,分析了各主要影响因素的作用,并对“咬入返回法”、“对开单向轧制法”“大头进钢法”等初轧特殊轧制法进行了分析、比较,提出了在万能板坯初轧机上,控制轧件头尾变形,达到最小切损率的途径。在此基础上,研制了“优势法”。“优势法”与其它轧制法相比,具有在显著提高板坯成坯率的条件下,基本不影响轧机生产率的优点。经压力测定和计算,采用若干次大压下量咬头、减半压下量轧制的方法,不会引起轧机故障,最高成坯率达97.43％,比现厂一般轧法提高3.77％。
In order to improve the billet blank of the as-cast slab, the deformation rules of the slab ingot were studied on the φ180 two-roll reversing rolling mill with the lead specimen at a similarity ratio of 1: 9, and the effect of each main influencing factor was analyzed. Inversion Method “,” One-Way Rolling Method “and” Big-head Entry Method “were analyzed and compared. It was proposed that on the universal blank rolling mill, the head and tail deformation of the rolling material should be controlled, Ways to reach the minimum rate of cut. On this basis, developed the ”Advantage Law.“ Compared with other rolling methods, the ”advantages method" has the advantage of not substantially affecting the rolling mill productivity under the condition of significantly increasing the billet blank forming rate. The pressure measurement and calculation, using a number of large amount of biting under the head, the amount of rolling reduction by half a way, will not cause a rolling mill failure, the highest billet rate of 97.43%, 3.77% higher than the current plant rolling law.