锻压技术

2A12铝合金旋压形变和热处理工艺

英文标题：Spinning deformation and heat treatment process of 2A12 aluminum alloy

作者：张子祺李国平

单位：济南大学机械工程学院

分类号：TG376

出版年,卷(期):页码：2021,46(12):197-202

摘要：

为了提高2A12铝合金薄壁壳体的力学性能，同时减小薄壁结构壳体的热处理变形，采用多道次强力正旋工艺在室温环境下对2A12铝合金进行了旋压试验，并结合旋压形变和热处理工艺研究和分析了减薄率、固溶热处理、时效热处理工艺对2A12铝合金力学性能的影响。试验结果表明：采用水冷固溶的铝合金的力学性能要优于真空气冷固溶的铝合金，水冷固溶处理的铝合金的抗拉强度比真空气冷工艺高出56～90 MPa，伸长率高出3.2%～4.7%。铝合金工件经过水冷固溶后必然产生一定的变形，再通过旋压工艺可在一定程度上提高工件的精度，由于加工硬化，铝合金的力学性能大幅下降，而此时进行人工时效获得的力学性能要优于自然时效。

In order to improve the mechanical properties and reduce the heat treatment deformation of 2A12 aluminum alloy thin-walled shell, the spinning experiment of 2A12 aluminum alloy at room temperature was conducted by the multi-pass power spinning process, and the influences of thinning ratio, solution heat treatment and aging heat treatment process on the mechanical properties of 2A12 aluminum alloy were investigated and analyzed by combining the spinning deformation and heat treatment process. The experimental results show that the mechanical properties of aluminum alloy after water-cooled solution are better than those after vacuum-air-cooled solution, its tensile strength and elongation after water-cooled solution are 56-90 MPa and 3.2%-4.7% higher than those after vacuum-air-cooled solution respectively. Furthermore, the aluminum alloy workpiece inevitably produces a certain deformation after the water-cooled solution, and the accuracy of the workpiece can be improved to a certain extent by the spinning process. Due to the work hardening, the mechanical properties of the workpiece are reduced significantly, and the mechanical properties obtained by artificial aging are better than those obtained by natural aging.

基金项目：

作者简介：张子祺（2000-），男，本科生 E-mail：504472235@qq.com 通信作者：李国平（1971-），男，博士，教授 E-mail：me_ligp@ujn.edu.cn

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