铸造2017，Vol.66Issue(6)：582-585,4.
初生相形态对半固态挤压铸造Al-Si-Mg-Fe合金力学性能的影响
Effects of Primary Phase Morphology on Mechanical Properties of Al-Si-Mg-Fe Alloy in Semi-Solid Squeeze Casting Process
摘要
Abstract
The gas induced semi-solid (GISS) process was developed to create Al-Si-Mg-Fe alloy semi-solid slurry with fine and uniform globular structure. With wheel hub castings as an example, the combination of local rapid heat extraction and vigorous agitation by the injection of fine inert gas bubbles through a graphite diffuser in molten metal held at a temperature above its liquidus temperature changes the morphology of primary α(Al) from coarse dendritic to rosette-like and finally to fine globular structure. The different solid fractions slurry was prepared by setting blowing capacity, blowing time and graphite diffuser head surface area. The GISS process produced semi-solid slurry at low solid fractions and then formed the slurry by a squeezing casting process to produce casting parts. The effects of primary phase morphology on the mechanical properties of Al-Si-Mg-Fe alloy were investigated. The results show that the ultimate tensile strength and elongation are affected by the shape factor and particle size of the primary α(Al).关键词
GISS/轮毂/显微组织/力学性能/挤压铸造Key words
gas induced semi-solid(GISS)/wheels/microstructure/mechanical properties/squeezing casting分类
信息技术与安全科学引用本文复制引用
张占领,张艳琴..初生相形态对半固态挤压铸造Al-Si-Mg-Fe合金力学性能的影响[J].铸造,2017,66(6):582-585,4.基金项目
国家科技重大专项基金(2011ZX04002-132) （2011ZX04002-132）
郑州市名师工作室资助项目(郑教高[2015]70号). （郑教高[2015]70号）
