中南大学学报（自然科学版）2011，Vol.42Issue(9)：2676-2680,5.
钢轨万能轧制过程轨底宽展的理论及实验研究
Theoretical and experimental research on spread of base of rail in universal rolling
摘要
Abstract
To obtain the spread of the base of rail in rail universal rolling, the deformation concordant coefficient and material's influence coefficient were applied in calculation of the spread of the base of rail, and the equivalent height of the base of rail was determined to obtain the equivalent reduction. Moreover, the rolling experiments of 18 kg/m light rail were accomplished. The theoretical and experimental results show that the elongation of the web of rail increases when the reduction of the base of rail is constant and the reduction of the web of rail increases, and the extra metal has to flow from the base of rail to the longitudinal direction to add the elongation of the base of rail for the deformation concordance of different parts of rail, so the spread of the base of rail decreases obviously. The friction coefficient between the base of rail and the flank of the horizontal roll increases when the rotating velocity of horizontal roll decreases, and the flow resistance of the base of rail along the lateral direction increases, so the spread of the base of rail decreases. Moreover, the deformation concordant coefficient can indicate the influence of the web's reduction ratio on the spread of the base basically, and it is feasible to preset the rolling technology rationally with this corrected spread formula.关键词
钢轨/万能轧机/轨底/宽展Key words
rail/ universal mill/ the base of rail/ spread分类
矿业与冶金引用本文复制引用
董永刚,张文志,宋剑锋..钢轨万能轧制过程轨底宽展的理论及实验研究[J].中南大学学报（自然科学版）,2011,42(9):2676-2680,5.基金项目
国家自然科学基金资助项目(50775196) （50775196）
高等学校博士点基金资助项目(20070216006) （20070216006）
河北自然科学基金资助项目(08B017) （08B017）
