Al-3Ti-1B-0.2C中间合金对A356合金的晶粒细化行为

张黎黎; 李鹏廷; 刘思达; 聂金凤; 刘相法

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Al-3Ti-1B-0.2C中间合金对A356合金的晶粒细化行为
Grain Refinement Performance of Al-3Ti-1B-0.2C Master Alloy on A356 Alloy
2011年31卷第6期页码：576-579
纸质出版日期： 2011 ，
DOI：

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[1]张黎黎,李鹏廷,刘思达,聂金凤,刘相法.Al-3Ti-1B-0.2C中间合金对A356合金的晶粒细化行为[J].特种铸造及有色合金,2011,31(06):576-579.

Zhang Lili1, Li Pengting1, Liu Sida2, et al. Grain Refinement Performance of Al-3Ti-1B-0.2C Master Alloy on A356 Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(6):576-579.
[1]张黎黎,李鹏廷,刘思达,聂金凤,刘相法.Al-3Ti-1B-0.2C中间合金对A356合金的晶粒细化行为[J].特种铸造及有色合金,2011,31(06):576-579. DOI：

Zhang Lili1, Li Pengting1, Liu Sida2, et al. Grain Refinement Performance of Al-3Ti-1B-0.2C Master Alloy on A356 Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(6):576-579. DOI：

摘要

对比了Al-5Ti-0.4C、Al-5Ti-1B及Al-3Ti-1B-0.2C中间合金对A356合金的晶粒细化行为。发现在730℃时

加入0.2%的Al-3Ti-1B-0.2C中间合金

可以使A356合金的晶粒尺寸由1000μm以上细化至175μm左右

保温60min内

细化效果稳定

其细化能力明显优于Al-5Ti-1B和Al-5Ti-0.4C中间合金

且该中间合金的加入不影响Sr对共晶Si的变质效果。与Al-5Ti-1B中间合金细化后的A356合金相比

经Al-3Ti-1B-0.2C中间合金细化后的A356合金室温抗拉强度和伸长率分别提高了5.18%和15.98%。

Abstract

Grain refinement performances of Al-5Ti-0.4C

Al-5Ti-1B and Al-3Ti-1B-0.2C on A356 alloy were investigated comparatively. The results show that average size of α-Al is decreased from above 1000μm to approximately 175μm with 0.2% Al-3Ti-1B-0.2C at 730 ℃

and the fade of refining efficiency can not be observed within 60 min

which is greatly superior to those of Al-5Ti-0.4C and Al-5Ti-1B master alloy. It is also found that modification effects of Sr on eutectic Si is independent of addition of the Al-3Ti-1B-0.2C master alloy. Compared with those of A356 alloy modified with Al-5Ti-1B

ambient tensile strength and elongation of the alloy modified with Al-3Ti-1B-0.2C are increased by 5.18% and 15.98%

respectively.