Effects of Grain Refiner on Microstructure of Large-volume Semisolid Slurry of High Strength Aluminum Alloy

Zhao Junwen; Li Wei; Luo Qinglai; Han Jing; Dai Guangze

doi:10.15980/j.tzzz.2015.02.006

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Effects of Grain Refiner on Microstructure of Large-volume Semisolid Slurry of High Strength Aluminum Alloy
Vol. 35, Issue 2, Pages: 134-137(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.02.006

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[1]赵君文,李微,罗庆来,韩靖,戴光泽.细化剂对高强铝合金半固态浆料组织的影响[J].特种铸造及有色合金,2015,35(02):134-137.

Zhao Junwen, Li Wei, Luo Qinglai, et al. Effects of Grain Refiner on Microstructure of Large-volume Semisolid Slurry of High Strength Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 35(2):134-137(2015)
[1]赵君文,李微,罗庆来,韩靖,戴光泽.细化剂对高强铝合金半固态浆料组织的影响[J].特种铸造及有色合金,2015,35(02):134-137. DOI： 10.15980/j.tzzz.2015.02.006.

Zhao Junwen, Li Wei, Luo Qinglai, et al. Effects of Grain Refiner on Microstructure of Large-volume Semisolid Slurry of High Strength Aluminum Alloy. [J]. Special Casting & Nonferrous Alloys 35(2):134-137(2015) DOI： 10.15980/j.tzzz.2015.02.006.

摘要

研究了细化剂对7A04铝合金大体积半固态浆料组织及其径向均匀性的影响。结果表明

添加晶粒细化元素Zr和Sc可以得到整体平均直径、圆整度分别为46μm、0.63的7A04铝合金半固态浆料组织

并提高大体积浆料组织的均匀性。细化剂作用的7A04铝合金半固态浆料变异系数仅为4.6%

随着温度降低

7A04铝合金半固态浆料组织的尺寸变大

均匀性变差

但圆整度变化不大。

Abstract

Effects of grain refiner on microstructure and radial homogeneity of large-volume semisolid slurry of 7A04 alloy were investigated.The results indicate that 7A04 alloy semi-solid slurry with average equivalent diameter of 46μm and shape factor of 0.63 as well as improved homogeneity can be prepared by adding grain refining element Zr

Sc.Large-volume 7A04 aluminum alloy slurry with coefficient of variation of 4.6% under 631 ℃ can be obtained with addition of grain refiner.With the decrease of the temperature

the homogeneity of 7A04 aluminum alloy slurry microstructure can be deteriorated

however

the change of roundness can be ignored.