The soft reduction technique can effectively improve the defects such as center segregation,loosening,and shrinkage of cast slabs.In order to improve the problems such as center segregation in the production process of continuous casting slabs of Q345qD steel with 2 270 mm×250 mm section,this study establishes a solidification heat transfer model,investigates the influence laws of casting speed,superheat,and specific water volume on the solidification process of Q345qD cast billets,and verifies the accuracy of the model through shot peg tests.dynamic soft reduction technology is used to improve the internal quality of cast billet.The results show that the proportion of cast billets with less than 1.0 grade segregation is increased from 51.21%to 62.11%after adopting the dynamic soft reduction technology.
关键词
动态轻压下/三维温度场/拉速/过热度/比水量
Key words
dynamic soft reduction/three-dimensional temperature field/casting speed/superheat/specific water volume
维普
万方数据