| 摘要: |
| 采用十字搭接试验方法测定2050铝锂合金焊接裂纹敏感性，研究了焊丝成分变化对2050铝锂合金焊接结晶裂纹率、液化裂纹率的影响，并对焊接接头的组织形貌、断裂特征和力学性能等进行了测试和分析。研究结果表明：采用钨极氩弧焊匹配Al-Cu-Si-Ti-Sc-Ce-B系焊丝对2050铝锂合金进行焊接，获得的焊接接头结晶裂纹率K1和液化裂纹率K2均为0，其强度系数可达母材的70%。 |
| 关键词: 2050铝锂合金 焊丝 焊接性能 |
| 基金项目: |
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| Effect of the Welding Wires Variation on Structure and Mechanical Property of Fusion-welding Joint of 2050 Al-Li Alloy Plate |
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Chen Yonglai Ding Junfeng Du Yue Huang Siyuan Shi Zheng Kang Li Lü Hongjun
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Aerospace Research Institute of Materials & Processing Technology, Beijing 100076
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| Abstract: |
| Welding crack susceptibility of 2050 Al-Li alloy is studied by using the cross-lap-joints method. Difference of welding wire component on the solidification crack rate and liquefied crack rates is analyzed. And the microstructure, fracture morphology, mechanical properties of the weld-joint are characterized. Results show that the solidification crack rate and liquefied crack rate of the weld-joint with Al-Cu-Si-Ti-Sc-Ce-B wire are zero, and the strength coefficient of the weld-joint reaches 0.7. |
| Key words: 2050 Al-Li alloy welding wire welding properties |
