不对称异径三辊轧机热连轧薄带钢新技术

Asymmetrical Hot-Strip Rolling Process on a 3-High Millwith Rolls of Different Diameters

采用不对称异径三辊轧机进行热连轧薄带钢生产试验研究，结果表明：（１）不对称轧制时由于金属与辊面接触面积减小和单位压力的下降而使轧制压力大幅度降低（４８％～６２％），显著提高了轧制效率；（２）所轧产品最小厚度由原二辊同径轧制的２．７５ｍｍ．减小到１．５ｍｍ，产品精度质量也得到提高，（３）用这种热轧薄带钢代替冷轧带钢制造轻型薄壁焊管，显著降低生产成本，提高经济效益．

A pilot test was carried out for the asymmetrical hot-strip rolling process on a 3-high mill with rolls of different diameters. Main results showed that (1) Because of the drop of specific roll pressure and reduction of the contact .area between metal and reduction of the contact area between metal and rolls, therolling load decreases, greatly by 48%～62% thus improving significantly the rolling efficiency; (2) The gauge of strip products from this 3-high mill can be down to l.5mm ; (3) Using such hot-rolled strips to weld thin wall steel tube to substitute for cold-rolled strips is favourable with cost significantly reduced and more economic benefits.