7075铝合金流变挤压铸造研究

王志刚; 徐骏; 李豹; 张志峰; 徐蕾

doi:10.15980/j.tzzz.2014.01.015

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7075铝合金流变挤压铸造研究
Rheo-squeeze Casting Process of 7075 Aluminum Alloy
2014年34卷第1期页码：54-57
纸质出版日期： 2014 ，
DOI： 10.15980/j.tzzz.2014.01.015

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[1]王志刚,徐骏,李豹,张志峰,徐蕾.7075铝合金流变挤压铸造研究[J].特种铸造及有色合金,2014,34(01):54-57.

Wang Zhigang, Xu Jun, Li Bao, et al. Rheo-squeeze Casting Process of 7075 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2014,34(1):54-57.
[1]王志刚,徐骏,李豹,张志峰,徐蕾.7075铝合金流变挤压铸造研究[J].特种铸造及有色合金,2014,34(01):54-57. DOI： 10.15980/j.tzzz.2014.01.015.

Wang Zhigang, Xu Jun, Li Bao, et al. Rheo-squeeze Casting Process of 7075 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2014,34(1):54-57. DOI： 10.15980/j.tzzz.2014.01.015.

摘要

通过对7075铝合金熔体进行环缝式电磁搅拌处理

获得具有均匀温度场和成分场的浆料

并采用挤压铸造方式成形

分析了铸件的金相组织

采用ProCAST软件对充型过程进行数值模拟。结果表明

环缝式电磁搅拌处理后的铝合金熔体

凝固过程中的枝晶生长被抑制

铸态组织细化;流变挤压铸造成形件组织致密

减少了热裂、缩松等缺陷的产生。

Abstract

Through annulus electromagnetic stirring（A-EMS）for 7075 aluminum alloy

the slurry with homogeneous temperature field and composition field was prepared to form specimens by rheo-squeeze casting.Microstructure of the specimens prepared was observed.Meanwhile

the filling process was simulated by the ProCAST software.The result shows that the dendritic growth in aluminum alloy after A-EMS is restrained during solidification process

leading to the refinement of the as-cast grain.The specimens formed by rheo-squeeze casting process exhibits sound structure with few casting defects such as hot crack and shrinkage porosity.