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材料导报, 2013, 27(5): 110-134.

铸造铝合金的细化机理

相志磊 1, , 马腾飞 2, , 陈子勇 3, , 聂祚仁 4, , 黄晖 5,

1.北京工业大学材料科学与工程学院,北京100124

2.北京工业大学材料科学与工程学院,北京100124

3.北京工业大学材料科学与工程学院,北京100124

4.北京工业大学材料科学与工程学院,北京100124

5.北京工业大学材料科学与工程学院,北京100124

基金项目:   国家重点基础研究发展计划973课题(2012CB6198503)   北京市教委重点基金(KZ20122100050008)  

关键词： 铝合金 , 细化剂 , 细化机理 , 稀土

Grain Refining Mechanisms of Casting Aluminum Alloy

综述了不同种类细化剂Al-Ti、Al-B、Al Ti-B、Al-Ti-C对纯铝及铸造Al-Si合金细化效果的影响,阐述了细化剂细化机理,主要为异质形核和相反应机制.Al-Ti-B中B的含量对Al-Si合金细化效果有重要影响,过量的B有利于细化Al-Si合金.探讨了稀土元素对细化剂组织形貌的影响,研发高效的Al-Ti-B-RE、Al-Ti-C-RE为主要发展方向.

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