锻压技术

加热方式对镁合金板材温渐进成形性能及力学性能的影响

英文标题：Influence of heating method on formability and mechanical properties for magnesium alloy sheet in warm incremental forming

作者：郑志洋陈宇祥廖娟

单位：福州大学

关键词：镁合金温渐进成形加热方式成形性能力学性能

分类号：TG306

出版年,卷(期):页码：2022,47(2):49-55

摘要：

不同加热方式会影响板材的温度分布，使板材不同位置出现温差，造成材料内部出现性能差异。针对上述问题，采用碳纤维电热管和热空气这两种整体加热方式对镁合金板材进行加热，通过成形变角度圆锥件和恒定成形角的方锥件来研究加热方式和成形温度对镁合金板材成形性能及其成形零件的力学性能的影响。结果表明：在150~275 ℃成形温度范围内，镁合金板材的成形性能随着成形温度的升高而增强；当成形温度为250 ℃时，镁合金板材具有较好的成形性能，且其成形零件也获得了最优的力学性能；在相同成形温度下，采用碳纤维电热管加热时镁合金板材具有更好的成形性能，其成形零件也具有更好的力学性能。

The temperature distribution of sheet is affected by different heating methods. Meanwhile, the temperature difference appears in the different positions of sheet，which resulting in material internal performance difference. In view of the above problems, the magnesium alloy sheets were heated by two overall heating methods of carbon fiber electric pipe heating and hot air heating, and the influences of heating methods and forming temperature on the formability of magnesium alloy sheet and the mechanical properties of its formed parts were studied by forming variable-angle cone parts and square cone parts with constant forming angle. The results show that in the forming temperature range of 150-275 ℃, the formability of magnesium alloy sheet is enhanced with the increasing of forming temperature. When the forming temperature is 250 ℃, the magnesium alloy sheet has better formability, and its formed parts also obtain the best mechanical properties. At the same forming temperature, the magnesium alloy sheet heated by carbon fiber electric pipe heating has better formability, and its formed parts also have better mechanical properties.

基金项目：

国家自然科学基金资助项目（51805087）；福建省自然科学面上基金（2018J01761, 2018J01764）

作者简介：郑志洋（1994-），男，硕士,E-mail：n180227088@fzu.edu.cn;通信作者：廖娟（1984-），女，博士，教授,E-mail：jliao@fzu.edu.cn

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