Preparation of 5052 Aluminum Alloy Semi-solid Slurry by Ultrasonic Vibration

L Shulin; Wu Shusen; Dai Wei; Zhu Zeming; Mao Youwu; Wan Li

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Preparation of 5052 Aluminum Alloy Semi-solid Slurry by Ultrasonic Vibration
Vol. 30, Issue 4, Pages: 326-329(2010)
Published： 2010 ，
DOI：

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[1]吕书林,吴树森,戴维,朱泽明,毛有武,万里.超声振动制备5052合金半固态浆料的研究[J].特种铸造及有色合金,2010,30(04):326-329+287.

L Shulin, Wu Shusen, Dai Wei, et al. Preparation of 5052 Aluminum Alloy Semi-solid Slurry by Ultrasonic Vibration. [J]. Special Casting & Nonferrous Alloys 30(4):326-329(2010)
[1]吕书林,吴树森,戴维,朱泽明,毛有武,万里.超声振动制备5052合金半固态浆料的研究[J].特种铸造及有色合金,2010,30(04):326-329+287. DOI：

L Shulin, Wu Shusen, Dai Wei, et al. Preparation of 5052 Aluminum Alloy Semi-solid Slurry by Ultrasonic Vibration. [J]. Special Casting & Nonferrous Alloys 30(4):326-329(2010) DOI：

摘要

研究了超声振动制备5052合金半固态浆料中各工艺参数对半固态浆料组织的影响。对665℃的铝合金熔体进行了超声振动试验。结果表明

合金熔体在超声场中作用90s左右

可得到晶粒尺寸约为110μm的非枝晶半固态浆料;随着超声作用时间的延长

晶粒越来越圆整

但90s后变化不大。启振温度是影响浆料组织的重要因素

在675℃时导入超声对熔体处理90s后

浆料的平均晶粒尺寸约为95μm

且呈球状。浆料在保温2min的过程中晶粒增长缓慢

4min时晶粒已开始大量融合。

Abstract

Effects of processing parameters on 5052 semi-solid slurry prepared by ultrasonic vibration at 665℃ were researched. The results reveal that non-dendrite semi-solid slurry with grain size of approximately 110μm can be prepared by imposing ultrasonic for about 90 s on the alloy melt. With extending in ultrasonic time

grain shape becomes more and more round

however

roundness change can be neglected with holding more than 90 s. Starting-vibration temperature greatly affects the structure of the slurry. The 5052 aluminum semi-solid slurry with approximately 95μm in average grain size and spheroidized structure can be observed with introducing ultrasonic vibration at 675℃ for 90 s. Grain size is grown slowly in the slurry with holing within 2 min

however

grain begins to merge with holding for 4 min.