| 磁场参数对AZ31焊接接头组织和性能的影响 |
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| 引用本文： | 苏允海,刘政军,王玉,张桂清.磁场参数对AZ31焊接接头组织和性能的影响[J].焊接学报,2007,28(5):45-48. |
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| 作者姓名： | 苏允海 刘政军 王玉 张桂清 |
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| 作者单位： | 1. 沈阳工业大学,材料科学与工程学院,沈阳,110023
2. 沈阳市特种设备检测研究院,沈阳,110035 |
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| 摘 要： | 对5 mm厚的AZ31镁板进行GTAW焊接的过程中,外加纵向交流磁场.通过对接头力学性能和显微组织分析,研究磁场参数对AZ31焊接接头组织和性能的影响规律,并墩磁场作用机理进行研究.结果表明,外加纵向磁场通过旋转电弧对熔池进行搅拌,改变晶粒结晶过程,使焊缝中晶粒组织得到细化,进而使焊接接头的抗拉强度和硬度等性能得到改善,同时磁场的电磁搅拌作用可以净化熔池中液态镁合金(使杂质球化并弥散分布),促进气泡上浮,降低镁合金焊接热裂纹敏感性,抑制热裂纹产生.
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| 关 键 词： | 纵向交流磁场 AZ31镁合金 钨极惰性气体保护焊 组织性能 场参数 焊接接头组织 性能 影响 magnesium alloy welded joint microstructure and properties parameters field 热裂纹敏感性 镁合金焊接 上浮 气泡 弥散分布 球化 液态镁合金 净化 搅拌作用 电磁 改善 |
| 文章编号： | 0253-360X（2007）05-045-04 |
| 收稿时间： | 2006/6/12 0:00:00 |
| 修稿时间： | 2006-06-12 |
Effect of magetic field parameters on microstructure and properties of welded joint of AZ31 magnesium alloy |
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| SU Yunhai,LIU Zhengjun,WANG Yu and ZHANG Guiqing.Effect of magetic field parameters on microstructure and properties of welded joint of AZ31 magnesium alloy[J].Transactions of The China Welding Institution,2007,28(5):45-48. |
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| Authors: | SU Yunhai LIU Zhengjun WANG Yu and ZHANG Guiqing |
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| Affiliation: | Department of Material Sciences and Engineering, Shenyang University of Technology, Shenyang 110023, China,Department of Material Sciences and Engineering, Shenyang University of Technology, Shenyang 110023, China,Shenyang Special Type Equipment Examining Academe, Shenyang 110035, China and Department of Material Sciences and Engineering, Shenyang University of Technology, Shenyang 110023, China |
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| Abstract: | AC lognitudinal magnetic field was employed in welding of 5 mm thick AZ31 magnesium alloy plate with GTAW.The effect of magnetic field parameters on properties and microstructure of welded joint of AZ31 was studied throungh analysing the tensile strength,hardness and microstruture.The action mechanism of magnetic field was explored.The results indicated that the molten pool is stirred by the AC lognitudinal magnetic field,the solidification process is changed,the crystal grain is refined,and tensile strength and hardness of welded joint are improved.The molten pool is purified by the eletromagnetic stirring,so the gas pore and sensitivity of hot crack are decreased,and the formation of hot crack was supressed. |
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| Keywords: | alternating current longitudinal magnetic field AZ31magnesium alloy gas tungsten arc welding mechanical property |
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