高频感应加热处理对2219铝合金TIG焊接接头残余应力的影响
Influence of high frequency induction heat treatment on residual stress in 2219 aluminum alloy TIG welded joint
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摘要: 采用变极性TIG焊接方法焊接8 mm厚2219铝合金板材,利用高频感应加热技术对焊接接头分别进行90 ℃,140 ℃,190 ℃的热处理。热处理前、后采用X射线衍射法测试2219铝合金TIG焊接接头残余应力,分析了接头的微观组织与力学性能。结果表明,经140 ℃,190 ℃热处理后,焊接残余应力下降趋势明显,经90 ℃热处理后,残余应力下降幅度较小。与未热处理接头相比,经高频感应热处理后,焊接接头的微观组织、拉伸性能与硬度分布无明显变化。Abstract: The tungsten inert gas(TIG) welding was used to weld 8 mm-thick 2219 aluminum alloy, the high frequency induction heat treatment was carried out to welded joint at 90 ℃,140 ℃ and 190 ℃, respectively, and X ray diffraction method was used to measure welding residual stress before and after heat treatment, then microstructure and mechanical properties were analyzed. The results showed that effects of heat treatment on welding residual stress at 140 ℃ and 190 ℃ are significant, while that at 90 ℃ is relatively poor. Compared with the samples without heat treatment, no obvious change is observed in microstructure, tensile properties and distribution of hardness of welded joint.
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Keywords:
- residual stress /
- welding /
- 2219 aluminium alloy /
- induction heat treatment
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[1] 丁 昌,汤伯歌,王三保,等. 不同热处理方法消除焊接残余应力的研究[J]. 郑州轻工业学院学报(自然科学版),2005,20(4):68-70. [2] 王秋成. 航空铝合金残余应力消除及评估技术研究[D]. 杭州:浙江大学硕士学位论文,2004. [3] Withers P J,Bhadeshia H K D H. Overview-residual stress part 1-measurement techniques[J]. Materials Science & Technology,2001,17(4):355-365. [4] 徐先泽,肖雅静,时千峰. 感应加热技术的应用及发展[J]. 现代零部件,2010(3):62-63. [5] 李庆庆,李晓延,杨东霞,等. 5E83铝合金TIG焊接头残余应力分布研究[J]. 焊接,2013(4):22-25. [6] 于新年,李新平,宋毅飞. 30CrMnSiNi2A钢零件感应加热局部回火工艺[J]. 金属热处理,2011,36(9):50-53. [7] 李庆庆,宋建岭,彭江涛,等. 2219铝合金TIG焊接头残余应力分布[J]. 焊接,2016(1):54-57. [8] 刘含伟,宋建岭,孙志鹏,等. 异种热处理状态2219铝合金TIG焊接头性能研究[J]. 焊接,2014(10):58-60,63.
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