A stir casting system for drawdown of light particles in manufacturing of metal matrix composites

被引：15

作者：

Thanh Tinh Tran ^{[1
]}

Thanh Thinh Vo ^{[1
]}

Cho, Seung Chan ^{[2
]}

Lee, Dong Hyun ^{[2
]}

Hwang, Wook Ryol ^{[1
]}

机构：

[1] Gyeongsang Natl Univ, Res Ctr Aircraft Parts Technol, Sch Mech & Aerosp Engn, Jinju 660701, South Korea

[2] Korea Inst Mat Sci, Chang Won 641831, South Korea

来源：

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY | 2018年 / 257卷

基金：

新加坡国家研究基金会;

关键词：

Particle drawdown; Stir casting; Metal matrix composites; Impeller; Particle distribution; SOLIDS; FLOWS; TANKS;

D O I：

10.1016/j.jmatprotec.2018.02.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An extensive set of experiments was carried out to examine the effects of impeller types, impeller locations (submergence), solid volume fraction, and baffle configuration on the drawdown efficiency. Flow simulations in a turbulent regime were also performed to investigate the flow patterns, spatial homogeneity (using the mean age distribution), and particle drawdown mechanisms (using a particle level simulation with the discrete phase model). A combination of two casting impellers (a helical impeller near the top and a radial one near the bottom) with two half -baffles was determined to be the optimal configuration for complete drawdown with enhanced particle distribution, while avoiding air entrainment and lowering the impeller speed. Hydrodynamic mechanisms leading to superior drawdown and dispersion performance of the optimal design are discussed with the formation of free surface swirling, turbulence strength, roles of half baffles and helical/radial impellers on the flow and particle motions.

引用

页码：123 / 131

页数：9

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