摘要
利用自制的单辊搅拌 (SRS)实验机制备出的A2 0 17半固态材料比常规铸造坯组织优良 ;在辊 靴型腔出口安装扩展成形模 ,使A2 0 17合金实现半固态扩展挤压成形·实验证明浇注温度高于 75 0℃ ,A2 0 17合金会过烧 ,不能成形 ;浇注温度低于 6 90℃时合金在出口发生完全凝固 ,不能实现扩展模充模 ;当靴子预热温度为 4 5 0℃ ,在最优浇注温度 710～ 730℃条件下 。
By using a self made test machine,microstructures of semisolid A2017 material manufactured by Single Roll Stirring(SRS) technology was examined. An extending extrusion mould was installed at the exit of roll shoe gap to extrude the A2017 semisolid alloy. It is shown that when the cast temperature is higher than 750?℃, A2017 is overripe and can not be formed. While the casting temperature is lower than 690?℃,A?2017 alloy has solidified completely in the front of the exit of the roll shoe gap and can not fill the extending mould. When the shoe preheated at 450?℃ and the casting temperature chosen at 710～730?℃,semisolid extrusion product with fine microstructure and good properties can be obtained.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2002年第7期679-682,共4页
Journal of Northeastern University(Natural Science)
基金
国家重点基础研究发展规划项目 (G2 0 0 0 0 672 0 8 4)
关键词
半固态材料
凝固
连续扩展成形
组织性能
semisolid material
solidification
continuous extending forming
microstructure and property
