【摘要】 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％。更多还原

【Abstract】 In order to increase the slab yield,the deformation behavior of slab ingots was studied,with asimilar ratio of 1 to 9,using the lead test pieces on a ?180 two-high reversing mill.The effects ofmain variables were analysed.The analyses and comparisons for the special rolling methods such as"bite back rolling method","reverse one way rolling" and "large end bite rolling method" were car-ried out,and the way in which the top and bottom end deformation of the slab can be controlled wasput forward and the crop lose may be minimized in a universal slabbing mill.Based on these the"Superiority Method" was investigated. Compared with other rolling methods,the "Superiority Method" did not effect the productivityof the mill while increasing the slab yield remarkably.Through the measurement and calculation ofthe rolling pressure,it has been shown that no mill troubles was caused by applying the high redu-ction at the moment of biting and then half as much as that given above being taken during rollingin several times.The highest slab yield of 97.43% was gained,which increased by a factor of 3.77%when compared with the common rolling methods in practice.更多还原