| 摘要: |
| 针对TC4钛合金开展了闪光对焊试验，分析研究了接头在不同焊后热处理工艺下的组织和力学性能。结果表明：采用闪光对焊方法焊接TC4钛合金，能够获得优质的焊接接头。焊后固溶+时效状态下，接头的强度达到1104MPa，与同状态下母材等强；焊后普通退火状态下，接头强度低于固溶时效状态，但塑性和韧性高于固溶时效状态，且随着焊后退火温度的升高，接头的强度降低，塑性和韧性升高 |
| 关键词: TC4钛合金 闪光对焊 组织 性能 |
| 基金项目: |
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| Effect of PWHTs on the Microstructure and Mechanical Properties of Flash Butt Welded TC4 Titanium Alloy |
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Wang Jinxue1, Yuan Hong1, Zhang Guodong1, Yu Huai1, Xiao Zhixiang2, Jiang Feilong2, Liu Zhong2
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1. Beijing Institution of Aeronautical Materials, Beijing 100095;2. Guiyang Anda Aerospace Material Engineering Co., Ltd, Guiyang 550009
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| Abstract: |
| Flash butt welding experiments of TC4 Titanium Alloy were carried out, then the microstructure and properties of the joints under the different post weld heat treatment procedures were studied. Results indicate that flash butt welding is suitable to weld the TC4 titanium alloy, and can gain the high quality joint. Under solution and aging condition, the tensile strength of the welded joints achieve 1104MPa, which is equal to the basic metal at the same condition. While ordinary annealing after welding，the tensile strength of the welded joints is lower than that under the condition of solution and aging, and the elongation and impact toughness are higher than that under the condition of solution and aging. Along with the increased annealing temperature，the tensile strength of the welded joints is reduced and the elongation and impact toughness is increased. |
| Key words: TC4 titanium alloy flash butt welding microstructure mechanical properties |
