工艺参数对半固态Al-4Cu-Mg合金微观组织与性能的影响

江海涛; 黄维超; 卢雅琳; 李淼泉

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工艺参数对半固态Al-4Cu-Mg合金微观组织与性能的影响
Influence of Processing Parameters on Microstructures and Properties of the Semi-solid Al-4Cu-Mg Alloy
2004年第3期页码：13-15
纸质出版日期： 2004 ，
DOI：

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[1]江海涛,黄维超,卢雅琳,李淼泉.工艺参数对半固态Al-4Cu-Mg合金微观组织与性能的影响[J].特种铸造及有色合金,2004(03):13-15+73.

Jiang Haitao Huang Weichao Lu Yalin Li Miaoquan. Influence of Processing Parameters on Microstructures and Properties of the Semi-solid Al-4Cu-Mg Alloy[J]. Special Casting & Nonferrous Alloys, 2004,(3):13-15.
[1]江海涛,黄维超,卢雅琳,李淼泉.工艺参数对半固态Al-4Cu-Mg合金微观组织与性能的影响[J].特种铸造及有色合金,2004(03):13-15+73. DOI：

Jiang Haitao Huang Weichao Lu Yalin Li Miaoquan. Influence of Processing Parameters on Microstructures and Properties of the Semi-solid Al-4Cu-Mg Alloy[J]. Special Casting & Nonferrous Alloys, 2004,(3):13-15. DOI：

摘要

采用应变诱发熔化激活工艺（SIMA）制备了半固态Al 4Cu Mg合金

并对其组织性能进行了研究。结果表明 :通过合理选择SIMA工艺参数

能够得到晶粒尺寸小且呈近球状的半固态组织 ;SIMA工艺参数对晶粒的大小和形状产生较大的影响。变形量越大、等温温度越低和保温时间越短

晶粒尺寸越小 ;变形量越大、等温温度越高和保温时间越长

分形维数越小

晶粒越圆整 ;采用变形量为 2 0 %～ 2 5 %、等温温度为 5 80～ 60 0℃和保温时间为 2～ 6min的合理SIMA工艺参数

可获得室温抗压强度和屈服强度分别为 3 5 8～ 3 87MPa和 2 46～ 2 65MPa的半固态材料。

Abstract

The microstructures and mechanical properties of the semi-solid Al-4Cu-Mg alloy prepared by SIMA were investigated. Results showed that the fine and near-spheroidal microstructures can be obtained by properly choosing the SIMA processing parameters. Grain size decreased with increasing the reduction

decreasing the isothermal temeprature and the holding time. The spheroidization of grain is promoted with the increase in reduction

isothermal temperature and the holding time as well as the decrease in fractual dimension. The semi-sold materials with 358～387 MPa of compression ultimate strength and 246～265 MPa of yield strength at room temperature can be prepared by the SIMA with 20%～25% reduction at 580～600 ℃ and holding time for 2～6 min.