锻压技术

电场固溶处理对2A12铝合金时效成形的影响

英文标题：Influences of solution treatment in an electric field on creep age forming of 2A12 aluminum alloy sheets

作者：黎俊初李明华刘大海

单位：南昌航空大学

关键词：铝合金固溶电场时效成形回弹

分类号：TG146.2

出版年,卷(期):页码：2015,40(6):102-107

摘要：

基于静电场固溶处理制坯为铝合金时效成形提供了一种新的方法。为评价该工艺的可行性，研究了不同电场强度对2A12铝合金时效成形的影响，探索了在不同固溶电场强度下的时效成形性与普通固溶处理后时效成形的差异，对处理后的2A12铝合金试件进行力学性能测试与显微组织分析。结果表明：电场固溶处理+时效成形对2A12铝合金的组织和性能有一定的影响，较普通固溶处理+时效成形表现出良好的成形性和伸长率；随着电场强度的增加回弹率逐渐降低，韧窝数量增加且尺寸增大；在固溶时施加5.2 kV·cm-1的电场强度可以促进第二相的溶解，导致CuAl2析出相的比重增大。

A new method for the creep age forming of aluminum alloy was provided based on solution treatment in an electric field to make billet. In order to evaluate the feasibility of this technology, the influence of different electric fields intensity on creep age forming of aluminum 2A12 was studied. The distinctions between creep age forming under different electric fields intensity and general creep age forming after solution treatment were explored and the mechanical properties and the microstructure of aluminum alloy 2A12 after treating were tested and analyzed. The results show that the creep age forming with solution treatment in an electric field has a certain impact on the microstructure and properties of aluminum alloy 2A12, and has better formability and elongation rate than age forming with general solution treatment. With the electric fields intensity increasing, the springback reduces gradually, the number of dimple is increased and size is enlarged. When solution treatment applied an electric intensity of 5.2 kV·cm-1，it will promote the dissolution of the second phase and lead to the increase of the proportion of CuAl2 precipitation.

基金项目：

国家自然科学基金资助项目（51375220）

黎俊初（1957-）男，硕士，教授；通讯作者：李明华(1986-) 男，硕士研究生

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