热等静压工艺对铝合金激光焊接T型接头组织及缺陷的影响
Influences of Hot Isostatic Pressing Technology on Microstructure and Defects of Laser Beam Welded Aluminium Alloy T-joints
摘 要
以3.3 mm厚6A02铝合金板材为试验材料, 对热等静压处理前后铝合金激光焊接T型接头的组织及气孔缺陷进行了分析。结果表明: 热等静压前6A02铝合金板母材显微组织为Mg2Si等强化相固溶于α(Al)基体中, 焊缝显微组织为树枝晶, 存在明显的气孔缺陷; 合理地选择热等静压工艺, 可有效消除接头的焊后气孔缺陷, 并提高母材的显微硬度, 降低焊缝中心的显微硬度; 而过高的热等静压压力和温度会使接头出现过烧组织, 大幅度降低其显微硬度。
激光焊接
T型接头
显微组织
气孔
过烧
hot isostatic pressing
laser beam welding
T-joint
microstructure
porosity
burning
Abstract
The Laser beam welding for 3.3 mm thick 6A02 aluminium alloy plates was implemented, and the effects of hot isostatic pressing process on microstructure and defects of the welded T-joints were systematically studied. The results show that the microstructure of the base metal consisted of α(Al) solid solution and Mg2Si phase and the welding seam consisted of dendrites. The porosity and microstructure defect vanished, the weld center hardness decreased and the base metal hardness increased after proper hot isostatic pressing technology. Contrarily, high hot isostatic pressing pressure and temperature would lead to the appearance of burnt structure and reduce the microhardness of the joints.
中图分类号 TG407
所属栏目 试验与研究
基金项目
收稿日期 2012/3/22
修改稿日期
网络出版日期
作者单位点击查看
备注张庆云(1981-), 女, 工程师, 硕士。
引用该论文: ZHANG Qing-yun,CHEN Li,LU Ye-hang,GONG Shui-li. Influences of Hot Isostatic Pressing Technology on Microstructure and Defects of Laser Beam Welded Aluminium Alloy T-joints[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2014, 50(2): 111～114
张庆云,陈俐,陆业航,巩水利. 热等静压工艺对铝合金激光焊接T型接头组织及缺陷的影响[J]. 理化检验－物理分册, 2014, 50(2): 111～114
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参考文献
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【3】MORAITIS G A, LABEAS G N. Residual stress and distortion calculation of laser beam welding for aluminum lap joints[J]. Journal of Materials Processing Technology, 2008, 198(1/3):260-269.
【4】ANCONA A, LUGAR P M, SORGENTE D, et al. Mechanical characterization of CO2 laser beam butt welds of AA5083[J]. Journal of Materials Processing Technology, 2007, 191(1/3):381-384.
【5】TIRYAKIOLU M, STALEY J J T, CAMPBELL J. The effect of hot isostatic pressing(HIP) on the fatigue life of A206-T71 aluminum castings[J]. Materials Science and Engineering: A, 2008, 487(1/2):383-387.
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