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细化铸造合金的晶粒,可以提高合金的常温性能。细化晶粒,包括增大等轴晶粒区和减小等轴晶粒的尺寸,这两者都同等轴晶粒的形成机理有关。现在,关于等轴晶粒的形成,已经提出了几种理论。 为了探索钛细化铝晶粒的机理,我们用钛白粉处理铝液,采用石墨铸型、薄壁低碳钢铸型,底面为流水冷却而侧面为细砂型的混合铸型,在水中、冰中和静止的空气中,在水平旋转磁场和水平静止磁场中,对铝液进行水平隔离、垂直隔离和水平垂直隔离的凝固实验,然后沿试样纵向轴心线剖开,宏观检查。
Refining the grain of the alloy, can improve the room temperature properties of the alloy. Grain refinement, including increasing equiaxed grain size and decreasing the size of equiaxed grains, are both related to the formation of equiaxed grains. Now, on the formation of equiaxed grains, several theories have been proposed. In order to explore titanium thin aluminum grain mechanism, we use titanium dioxide to deal with aluminum, using graphite mold, thin-walled low-carbon steel mold, the bottom of the cooling water and the side of the fine sand mixed mold, in the water, ice In the static and neutral air, horizontal liquid magnetic field and horizontal static magnetic field, the liquid aluminum horizontal isolation, vertical isolation and horizontal vertical solidification experiment, and then cut along the longitudinal axis of the sample, macro inspection.