固溶处理对CDS制备过共晶Al-Si合金组织的影响

于珂璐; 李元东; 周宏伟; 陈天赐; 孙延蓝; 马颖

doi:10.15980/j.tzzz.2018.04.026

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固溶处理对CDS制备过共晶Al-Si合金组织的影响
Effects of Solid Solution Treatment on Microstructure of Al-18Si Alloy Prepared by CDS
2018年38卷第4期页码：445-448
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.04.026

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[1]于珂璐,李元东,周宏伟,陈天赐,孙延蓝,马颖.固溶处理对CDS制备过共晶Al-Si合金组织的影响[J].特种铸造及有色合金,2018,38(04):445-448.

Yu Kelu, Li Yuandong, Zhou Hongwei, et al. Effects of Solid Solution Treatment on Microstructure of Al-18Si Alloy Prepared by CDS[J]. Special Casting & Nonferrous Alloys, 2018,38(4):445-448.
[1]于珂璐,李元东,周宏伟,陈天赐,孙延蓝,马颖.固溶处理对CDS制备过共晶Al-Si合金组织的影响[J].特种铸造及有色合金,2018,38(04):445-448. DOI： 10.15980/j.tzzz.2018.04.026.

Yu Kelu, Li Yuandong, Zhou Hongwei, et al. Effects of Solid Solution Treatment on Microstructure of Al-18Si Alloy Prepared by CDS[J]. Special Casting & Nonferrous Alloys, 2018,38(4):445-448. DOI： 10.15980/j.tzzz.2018.04.026.

摘要

采用固溶处理

研究CDS制备过共晶Al-18Si合金中初生Si相与共晶Si相形貌的变化。结果表明

随着固溶温度的升高和固溶时间的延长

初生Si相平均尺寸显著减小

经570℃×6h固溶后

合金中初生Si相尺寸为20.78μm;共晶Si的变化趋势和初生Si相似

均由针状逐渐粒化为近球状

经570℃×6h固溶后

合金中共晶Si尺寸为5.44μm

且分布趋向均匀。

Abstract

Effects of solution treatment on the evolution of microstructure of primary Si and eutectic Si in Al-18 Si alloy prepared by CDS were investigated.The results show that the average size of primary Si in Al-18 Si is decreased significantly with the increase of temperature and time

where primary Si size reaches 20.78μm at 570℃for 6 hsolution treatment.The eutectic Si is also refined from acicular structure to near-spheroidization with increasing in temperature and time

where the average size of eutectic Si phase is decreased from 25.57μm to 5.44μm with more uniform distribution.