| TIG焊接热循环对AZ31B镁合金硬度的影响 |
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| 引用本文： | 肖锋,傅亚,徐晓菱,李春天,赵玮霖,杨惠.TIG焊接热循环对AZ31B镁合金硬度的影响[J].稀有金属,2005,29(5):604-608. |
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| 作者姓名： | 肖锋 傅亚 徐晓菱 李春天 赵玮霖 杨惠 |
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| 作者单位： | 1. 重庆工学院材料界面物理化学研究所,重庆,400050
2. 中国兵器工业第五九研究所第六研究室,重庆,400039 |
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| 基金项目： | 教育部留学回国人员科研启动基金资助项目（2004-527）：重庆市科委基金资助项目（CSTC2004BA4002,CSTC2004003-6,8656）;重庆市留学回国人员资助项目（2005-94）;重庆工学院基金项目（2003ZD3） |
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| 摘 要： | 以AZ31B镁合金为研究对象，采用TIG焊方法进行焊接，考察了焊接热循环对镁合金的硬度的影响。测量、比较、分析了焊缝、热影响区、母材的硬度。结果表明，表面处理过程（研磨、抛光、侵蚀液体及工艺等）对镁合金硬度的影响很大，直接影响到“焊接工艺-硬度”之间关系。与母材相比，由于焊缝的冷却速率高，组织细小，硬度较高。热影响区的组织虽比母材粗大，但硬度与母材相近。焊缝区不同部位的硬度存在一定差异。
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| 关 键 词： | 焊接 镁合金 硬度 |
| 文章编号： | 0258-7076（2005）05-0604-05 |
| 收稿时间： | 2005-07-09 |
| 修稿时间： | 2005-07-092005-08-15 |
Effect of Welding Thermal Cycling on Hardness of AZ31B Magnesium Alloys |
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| Xiao Feng,Fu Ya,Xu Xiaoling,Li Chuntian,Zhao Weilin,Yang Hui.Effect of Welding Thermal Cycling on Hardness of AZ31B Magnesium Alloys[J].Chinese Journal of Rare Metals,2005,29(5):604-608. |
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| Authors: | Xiao Feng Fu Ya Xu Xiaoling Li Chuntian Zhao Weilin Yang Hui |
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| Affiliation: | 1. Materials Interfacial Physical-Chemistry Research Institute, Chongqing Institute of Technology, Chongqing 400050, China; 2. No. 6 Department, No. 59 Institute of China Weapon Industry, Chongqing 400039, China |
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| Abstract: | AZ31B magnesium alloy was welded using TIG method, and the influence of welding thermal cycling on the hardness of AZ31B alloy was studied. The hardness in fusion zone, heat affect zone and base metal was measured, compared and analyzed. Surface treatment such as grinding, polishing, etching influences significantly the hardness of magnesium alloy and the relationship between welding process andhardness. Compared with base metal, the microstructure in fusion zone is finer, and the hardness is higher because of the relatively higher cooling rate. Although the microstructure in heat affect zone is coarser than that in base metal, the hardness is similar to that in base metal. The difference exists in hardness at various places in fusion zone. |
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| Keywords: | weld magnesium alloys hardness |
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