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Effect of Bi and Mn Metamorphism on Hypereutectic Al-Si Alloy Organization
Pages: 107-110
Year: Issue:  2
Journal: Journal of Liaoning Institute of Technology(Natural Science Edition)

Keyword:  变质初晶硅共晶硅;
Abstract: 研究了Bi、Mn变质对过共晶铝硅合金组织的影响.结果表明:经3.4%Bi元素变质后,过共晶铝硅合金中的初生硅尺寸明显变大,经3%Mn元素变质后,组织中初晶硅形貌并没有改变,棱角仍很尖锐,而共晶硅则都由长针状变成短棒状或颗粒状.加入合金元素后都形成了复合相,消耗了P的变质作用,减少了初晶硅的异质核心,使初晶硅尺寸变大,同时减少了共晶硅所占比例.
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