论述了稀土细化晶粒、减轻枝晶偏析、改善非金属夹杂物形态和分布及其对铸钢件质量的影响。
The influences of RE on solidification of steel, on dendrite segregation and on morphology of nonmetallic inclusions in steel are discussed in coordination with the authors research.
改善中心偏析关键在于控制液相穴末端的枝晶间液相的流动状况。
The control of the interdendritic flow at the end of the liquid pool is important to prevent the centreline segregation.
偏析的生成是因为局部加压使枝晶间的残余金属液产生局部流动而形成的。
Segregation is caused by remained metal liquid, which is driven by local pressure.
利用传统的元胞自动机方法摸拟了基于溶质扩散控制界面生长机制的枝晶演变和显微偏析。
The dendrite evolution and micro-segregation based on mechanism of solute diffusion controlling interfacial growth is simulated by cellular automaton.
在铸坯凝固末端轻压下直接作用区域，两相区受到压缩，枝晶间富含溶质的液相被挤出，相对于铸坯向液芯方向流动。轻压下之后，铸坯中心区域由糊状区内被压缩的固相及残留的液相构成，中心区域偏析指数下降。
The simulation results show that mushy region is compressed and interdendritic solute-rich liquid flows toward the liquid core in the soft reduction action zone at the solidification end of the slab.
在铸坯凝固末端轻压下直接作用区域，两相区受到压缩，枝晶间富含溶质的液相被挤出，相对于铸坯向液芯方向流动。轻压下之后，铸坯中心区域由糊状区内被压缩的固相及残留的液相构成，中心区域偏析指数下降。
The simulation results show that mushy region is compressed and interdendritic solute-rich liquid flows toward the liquid core in the soft reduction action zone at the solidification end of the slab.
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