Microstructrural Characteristics of Semi-Solid State Al-24%Si Alloy during Isothermal Electromagnetic Stirring
-
摘要: 研究了Al-24% Si合金在半固態等溫電磁攪拌下組織的變化規律.實驗分冷卻過程不攪拌和冷卻過程攪拌2種.保溫溫度為577℃,在此溫度下,攪拌時間長達40 min.結果發現,攪拌過程中同時發生初生硅相的破碎和聚合行為,當等溫攪拌時間超過20 min后初生硅相粒子的尺寸變化不大,其分布也趨于均勻;組織中出現了球狀的α相.Abstract: Microstructure characteristics of Al-24%Si alloy was studied at the condition of isothermal electromagnetic stirring.Experiment was divided two groups:Stirring and no stirring during cooling course.Isothermal temperature is 577℃ with shearing time up to 40 minutes.Results discover that primary silicon crystal fragmentation and agglomeration occurs simultaneously in the course of stirring.The size of primary silicon phase tends to a constant. Spherical phase appears in the microstructure.
-
Key words:
- electromagnetic stirring /
- hypereutectic Al-Si alloy /
- microstructure
-
點擊查看大圖
計量
- 文章訪問數: 251
- HTML全文瀏覽量: 69
- PDF下載量: 7
- 被引次數: 0
下載:
