Effects of Ultrasonic Vibration on Solidification Structure of Zn-55Al-1.6Si Alloy

Wang Shan; Wu Liangce; Zheng Lijing; Zhang Hu

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Effects of Ultrasonic Vibration on Solidification Structure of Zn-55Al-1.6Si Alloy
Vol. 31, Issue 3, Pages: 285-287(2011)
Published： 2011 ，
DOI：

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[1]王姗,吴良策,郑立静,张虎.超声振动对Zn-55Al-1.6Si合金凝固组织的影响[J].特种铸造及有色合金,2011,31(03):285-287+195-196.

Wang Shan, Wu Liangce, Zheng Lijing, et al. Effects of Ultrasonic Vibration on Solidification Structure of Zn-55Al-1.6Si Alloy. [J]. Special Casting & Nonferrous Alloys 31(3):285-287(2011)
[1]王姗,吴良策,郑立静,张虎.超声振动对Zn-55Al-1.6Si合金凝固组织的影响[J].特种铸造及有色合金,2011,31(03):285-287+195-196. DOI：

Wang Shan, Wu Liangce, Zheng Lijing, et al. Effects of Ultrasonic Vibration on Solidification Structure of Zn-55Al-1.6Si Alloy. [J]. Special Casting & Nonferrous Alloys 31(3):285-287(2011) DOI：

摘要

研究了超声振动工艺参数对Zn-55Al-1.6Si合金凝固组织的影响。结果表明

Zn-55Al-1.6Si合金熔体经过超声振动处理后

凝固组织发生了显著变化。随着超声功率增大

初生α相由粗大的树枝晶变为细小圆整的蔷薇状;超声功率增至200W后

继续增大施振功率

细化效果没有明显变化。在超声功率一定的条件下

施振温度区间对凝固组织也有影响。当超声终止温度在液相线以下时

初生α相变为各向同性的蔷薇状及近球状

且超声终止温度越低

组织越细小圆整。施振功率为200W左右、施振温度区间为620～540℃时

是较为理想的超声细化处理工艺

此时粗大的枝晶状α-Al骨架变为细小球状。

Abstract

Effects of ultrasonic vibration on solidification structure of Zn-55Al-1.6Si alloy were investigated. The results show that solidification structure of the alloy is apparently changed after ultrasonic treatment. With increasing in ultrasonic power

primary α phase is converted from coarse dendrite into fine and round rosette one. However

when ultrasonic power exceeds 200 W

with increasing in power

refining effects can be ignored. At a given ultrasonic power

solidification structure is also related with ultrasonic temperature. When vibration-stop temperature is below liquidus temperature

primary α phase is transformed into isotropic rosette and near spherical structure. Furthermore

the lower the vibration-stop temperature is

the finer the structure is. Coarse dendritic α-Al phase is transformed into fine spherical one with ultrasonic power of approximately 200W at 540～620℃.