| LY12硬铝合金TIG与A—TIG焊接接头组织和熔深的研究 |
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| 引用本文： | 王燕,魏晓红,胡宗智.LY12硬铝合金TIG与A—TIG焊接接头组织和熔深的研究[J].新技术新工艺,2011(8):131-134. |
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| 作者姓名： | 王燕 魏晓红 胡宗智 |
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| 作者单位： | 三峡大学机械与材料学院,湖北宜昌,443002 |
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| 基金项目： | 宜昌市科学技术研究与开发项目资助(A08303-06) |
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| 摘 要： | 针对Al-Cu—Mg系共晶型高强度LY12硬铝合金，进行了TIG与A—TIG焊接接头组织特征和熔深变化规律的研究。结果表明，在相同焊接规范下，TIG与A—TIG焊接接头焊缝区金相组织均为树枝状晶，热影响区金相组织均为等轴晶，差别在于A—TIG焊接接头组织晶粒较粗大。高倍显微镜下的金相组织显示，A—TIG焊缝区和热影响区中强化相数量比TIG焊多，且比TIG焊粗大。另外由于活性剂的加入，电弧产生收缩，热量集中，使得A—TIG焊熔深比TIG焊大。
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| 关 键 词： | 硬铝合金 TIG焊 A—TIG焊 金相组织 熔深 |
Research on Microstructure and Weld Penetration of LY12 Duralumin Alloy Welded Joint under TIG Welding and A-TIG Welding |
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| WANG Yan,WEI Xiaohong,HU Zongzhi.Research on Microstructure and Weld Penetration of LY12 Duralumin Alloy Welded Joint under TIG Welding and A-TIG Welding[J].New Technology & New Process,2011(8):131-134. |
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| Authors: | WANG Yan WEI Xiaohong HU Zongzhi |
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| Affiliation: | WANG Yan,WEI Xiaohong,HU Zongzhi(College of Mechanical and Material Engineering,China Three Gorges University,Yichang 443002,China) |
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| Abstract: | This paper have researched the microstructure characteristics and weld penetration change law of welded joint of Al-Cu-Mg system eutectic type high strength LY12 duralumin alloy under TIG welding and A-TIG welding.Results showed that the weld zone microstructure of TIG welding and A-TIG welding was dendritic crystal and the heat-affected zone microstructure of TIG welding and A-TIG welding was equiaxed crystal under the same welding specification.The difference was that the microstructure of A-TIG welded jo... |
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| Keywords: | Duralumin alloy TIG welding A-TIG welding Metallurgical structure Weld penetration |
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