Influencing factors and improvement measures of Q345qD continuous casting slab center segregation
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.
dynamic soft reductionthree-dimensional temperature fieldcasting speedsuperheatspecific water volume
万方数据
维普
