Modeling of Solidification Process of Al-Zn Droplet during Spray Forming,Part Ⅰ:Solidification Behavior of Single Droplet

Liu Dongming1; Dong Ying2; Wang Kai3; Zhao Jiuzhou4

Views : 0 下载量: 229 CSCD: 1

Export
Share
Collection
Album

Modeling of Solidification Process of Al-Zn Droplet during Spray Forming,Part Ⅰ:Solidification Behavior of Single Droplet
Issue 9, Pages: 657-659(2008)
Published： 2008 ，
DOI：

扫描看全文

[1]刘东明,董盈,王凯,赵九洲.喷射成形Al-Zn合金凝固过程模拟Ⅰ——单个液滴凝固行为[J].特种铸造及有色合金,2008(09):657-659+651.

Liu Dongming1, Dong Ying2, Wang Kai3, et al. Modeling of Solidification Process of Al-Zn Droplet during Spray Forming,Part Ⅰ:Solidification Behavior of Single Droplet. [J]. Special Casting & Nonferrous Alloys (9):657-659(2008)
[1]刘东明,董盈,王凯,赵九洲.喷射成形Al-Zn合金凝固过程模拟Ⅰ——单个液滴凝固行为[J].特种铸造及有色合金,2008(09):657-659+651. DOI：

Liu Dongming1, Dong Ying2, Wang Kai3, et al. Modeling of Solidification Process of Al-Zn Droplet during Spray Forming,Part Ⅰ:Solidification Behavior of Single Droplet. [J]. Special Casting & Nonferrous Alloys (9):657-659(2008) DOI：

摘要

应用群体动力学方法

模拟分析了雾化条件下Al-12Zn合金液滴凝固行为和气体初始速度、熔炼温度等参数对单个液滴凝固过程的影响。结果表明

液滴凝固过程可以分为液体冷却、形核和再辉、晶粒长大和共晶凝固、固体冷却5个阶段;对于给定尺寸的液滴

提高气体初始速度或提高熔炼温度

在相同飞行距离时的固相率减少。

Abstract

A model based on the population dynamics method（PDM） was used to analyze the solidification behaviors of the Al-12Zn alloy droplets produced by gas atomization

and effects of the initial gas velocity and the melting temperature on the solidification process of single droplet were approached. The results show that the droplet undergoes five different thermal stages

i.e. liquid phase cooling

nucleation and recalescence

grain growth

eutectic solidification

solid phase cooling. The solid phase fraction in a droplet with a given size can be decreased with increasing in initial gas velocity or in melting temperature at the same flight distance.