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电磁搅拌对改善铸坯质量、组织结构主要表现在以下几个方面:a.改变凝固过程的动力学条件。电磁搅拌作用是打断枝晶梢成为等轴晶核,使晶粒细化形成细密的等轴晶。电磁搅拌器的安装位置过高,搅拌作用过早终止而再次产生柱状晶;安装位置过低,搅拌作用无法切断已形成搭桥的柱状晶。b.改变凝固过程中热力学条件。电磁搅拌的作用加速了钢液的流动,从而改善了传热条件,
Electromagnetic stirring to improve the quality of slab, the organizational structure mainly in the following areas: a. Change the kinetic conditions of the solidification process. Electromagnetic stirring is to break the branch tip into equiaxed nuclei, the grain refinement to form a fine equiaxed crystal. Electromagnetic stirrer installation location is too high, the role of premature termination of stirring to produce columnar crystals; installation location is too low, the role of stirring can not cut the bridge has been formed columnar crystal. b. Change the thermodynamic conditions during solidification. The role of electromagnetic stirring speed up the flow of molten steel, thereby improving the heat transfer conditions,