| LF21铝合金厚板搅拌摩擦焊接接头微观组织研究 |
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| 引用本文： | 赵勇,卢学府,付娟,方圆,严铿.LF21铝合金厚板搅拌摩擦焊接接头微观组织研究[J].江苏科技大学学报(社会科学版),2009,23(2). |
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| 作者姓名： | 赵勇 卢学府 付娟 方圆 严铿 |
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| 作者单位： | 赵勇,付娟,方圆,严铿,Zhao Yong,Fu Juan,Fang Yuan,Yan Keng(江苏科技大学,先进焊接技术省级重点实验室,江苏,镇江,212003);卢学府,Lu Xuefu(广州中船黄埔造船有限公司,广东,广州,510715)
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| 摘 要： | 针对14 mm厚的LF21铝合金,采用搅拌摩擦焊进行焊接,焊后对接头的宏观形貌、微观组织和接头不同区域的显微硬度进行分析.实验结果表明:在焊接速度v为200mm*min-1,转速ω为1200rad*min-1时,焊缝成型较美观,焊缝内部无空洞、裂纹等缺陷.显微组织观察发现焊核区的组织为再结晶等轴晶粒,晶粒明显细化;热机械影响区组织由原始母材细纤维组织转变为具有一定弧度的弯曲粗纤维组织;热影响区范围较窄,晶粒与母材相似,但出现了晶粒粗化现象.显微硬度实验发现,焊缝中层和上层的显微硬度较高,而下层较低.
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| 关 键 词： | LF21铝合金 搅拌摩擦焊 微观组织 显微硬度 |
Microstructure in friction stir welding of thick LF21 aluminum alloy |
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| Zhao Yong,Lu Xuefu,Fu Juan,Fang Yuan,Yan Keng.Microstructure in friction stir welding of thick LF21 aluminum alloy[J].Journal of Jiangsu University of Science and Technology:Natural Science Edition,2009,23(2). |
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| Authors: | Zhao Yong Lu Xuefu Fu Juan Fang Yuan Yan Keng |
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| Institution: | 1.Provincial Key Lab of Advanced Welding Technology;Jiangsu University of Science and Technology;Zhenjiang Jiangsu 212003;China;2.CSSC Guangzhou Shipbuilding Company Limited;Guangzhou Guangdong 510715;China |
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| Abstract: | In this paper,14mm thick LF21 rust-resisting aluminum alloy was jointed by friction stir welding,and its macro-organization and microstructure were analyzed.Experiment shows that weld can be divided into weld heat affected zone,thermal mechanical affected zone,and weld nugget regions.Among them,weld nuggets obviously are recrystallized isometric grains,and grains are obvious refining.There are many coarse grains in thermal mechanical affected zone from a small base metal deformation of fibrous tissue to rad... |
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| Keywords: | LF21 aluminum alloy friction stir welding microstructure micro hardness |
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