B对亚共晶Al-7Si合金共晶凝固过程的影响

耿慧远; 李言祥; 陈祥; 王雪

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B对亚共晶Al-7Si合金共晶凝固过程的影响
Effects of B on the Eutectic Solidification of Hypereutectic Al-Si Alloy
2005年第5期页码：257-259
纸质出版日期： 2005 ，
DOI：

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[1]耿慧远,李言祥,陈祥,王雪.B对亚共晶Al-7Si合金共晶凝固过程的影响[J].特种铸造及有色合金,2005(05):257-259+253.

Geng Huiyuan Li Yanxiang Chen Xiang Wang Xue. Effects of B on the Eutectic Solidification of Hypereutectic Al-Si Alloy[J]. Special Casting & Nonferrous Alloys, 2005,(5):257-259.
[1]耿慧远,李言祥,陈祥,王雪.B对亚共晶Al-7Si合金共晶凝固过程的影响[J].特种铸造及有色合金,2005(05):257-259+253. DOI：

Geng Huiyuan Li Yanxiang Chen Xiang Wang Xue. Effects of B on the Eutectic Solidification of Hypereutectic Al-Si Alloy[J]. Special Casting & Nonferrous Alloys, 2005,(5):257-259. DOI：

摘要

研究了B含量及保温时间对Al 7Si合金凝固组织和冷却曲线的影响。利用热分析技术测量了冷却曲线共晶凝固段的特征值

利用图像分析技术测量了共晶Si相平均面积、形状指数。结果显示B的加入对Si相形状指数和冷却曲线特征值的影响不大;在一定的晶粒尺寸范围内共晶Si相平均面积随着初晶晶粒尺寸的减小而减小。

Abstract

The effects of B content and holding time on solidification microstructure and cooling curves of Al-7Si alloy were investigated.The characteristic values of eutectic solidification section in cooling curves were measured by thermal analysis

and the average area and shape factors of eutectic phase were observed by the image analysis.It was found that B addition has a slight effect on the shape factors of the Si phase and characteristic values in cooling curve.The average area of the Si phase is decreased with the decrease of the primary grain size in a given grain size range.