过热处理细化亚共晶Al-7％Si合金的定量研究

Quantitative Study on Refining of Hypoeutectic Al-7%Si Alloy by Superheating Treatment

在实验的基础上，运用定量金相和数理统计的方法，定量研究了过热处理细化亚共晶Al-7％Si舍金的规律。通过对这些规律进行回归分析，得到相应的回归方程。方程分析表明，仅通过熔体过热处理这一因素，理论上能细化晶粒最小到20．0944μm。这一数据对熔体处理的工艺制定和熔体结构的研究有重要的意义。

On the basis of experiment, with the help of quantitative metallography and mathematical statistics, the effect of superheating on refining of hypoeutectic Al- 7%Si alloy is studied quantitatively. The regression analysis of these rules shows, crystal grain could theoretically be r,.fined to 20. 0944μm. This data is very important to technology of melt treatment and research of melt structure.