摘要
采用合金热力学计算方法对Al-Si-Mg系适合半固态加工的合金成分进行了优化设计,并进行了实验验证研究。结果表明:采用国际通用的ThermoCalc软件能够成功地对Al-Si-Mg系合金成分进行优化设计,计算结果与实验结果具有较好地一致性;优化后的Al-6Si-2Mg合金在各工序中都表现出良好的半固态加工性能,连铸和二次加工过程的稳定性和可控性大大提高,坯料的凝固组织更加细化、球化和均质化;通过优化工艺,最终获得了Al-6Si-2Mg合金半固态触变成形的最佳工艺参数和外观完整、性能优良的半固态压铸件,为半固态触变成形的工业应用打好了基础。
The new SSM processing alloys of Al-Si-Mg temary system were designed and optimized by thermodynamic calculation ,and experimental tests were also done based on the above theoretical calculations. It is shown that, the composition design of Al-Si-Mg ternary alloy system can be successfully presented by using the Thermo Calc software and the calculated results are in a good agreement with the experimental ones; the optimized Al-6Si-2Mg alloy shows good processing capabilities in every step of the process including electromagnetic stirring DC casting, reheating and die-casting, and the grain refinement, roundness and homogenization are improved; the optimized processing parameters of the new Al-6Si-2Mg alloy and the die-casting parts with good shape and properties are obtained by optimal processing, which will provide a foundation for the industrial application of this technology.
出处
《热加工工艺》
CSCD
北大核心
2005年第9期3-5,31,共4页
Hot Working Technology
基金
国家高技术研究发展计划(863)资助项目(2002AA336080)
关键词
铝合金
合金设计
半固态
非枝晶组织
触变成形
aluminum alloy
alloy design
semi-solid
non-dendritic microstructure
thixoforming
