| 焊后热处理对2A14高强铝合金电子束焊接头组织及力学性能的影响 |
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| 引用本文： | 王亚荣,黄文荣,雷华东.焊后热处理对2A14高强铝合金电子束焊接头组织及力学性能的影响[J].机械工程学报,2011,47(20). |
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| 作者姓名： | 王亚荣 黄文荣 雷华东 |
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| 作者单位： | 中国工程物理研究院机械制造工艺研究所 绵阳621900 |
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| 摘 要： | 轻质化的需求使得人们把关注的焦点集中于轻质材料,高强铝合金作为钢结构材料的最佳替代品,受到越来越广泛的关注,利用电子束焊接高强铝合金,为获得性能优良的2A14高强铝合金电子束焊接接头,采用焊后热处理,通过组织观察(光学显微镜和扫描电镜)、维氏硬度测试、接头拉伸性能测试等方法研究焊后热处理对2A14电子束焊接接头显微组织和性能的影响。结果表明,通过焊后热处理,焊缝中心原晶界分布的网状共晶组织回溶于基体组织中消失,焊缝内部析出大量弥散强化项,基体强化效果增强,显微硬度显著升高,由焊态下低于母材硬度直接升高至超过母材硬度。接头抗拉强度由原来的355MPa提高到465 MPa,超过了母材强度。接头断裂均发生在焊缝,由断口分析发现热处理后接头韧性增强,韧窝深度增加,且有第二相质点出现。
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| 关 键 词： | 高强铝合金 电子束焊 热处理 组织 力学性能 |
Effects of Post Weld Heat Treatment on Microstructure and Mechanical Properties of 2A14 High Strength Aluminum Alloy by Electron Beam Welding |
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| WANG Yarong,HUANG Wenrong,LEI Huadong.Effects of Post Weld Heat Treatment on Microstructure and Mechanical Properties of 2A14 High Strength Aluminum Alloy by Electron Beam Welding[J].Chinese Journal of Mechanical Engineering,2011,47(20). |
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| Authors: | WANG Yarong HUANG Wenrong LEI Huadong |
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| Affiliation: | WANG Yarong HUANG Wenrong LEI Huadong(Institute of Mechanical Manufacturing Technology,China Academy of Engineering Physics,Mianyang 621900) |
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| Abstract: | The challenges of significant weight reduction have promoted a focus on selection of light-weight materials.That is the reason that high strength aluminum alloy is becoming widely recognized as the candidates to replace steel.In order to develop proper post weld heat treatment process of 2A14 high strength aluminum alloy welded by electron beam,the effects of post weld heat treatment on microstructure and mechanical properties of 2A14 aluminum alloy welded joint are studied by using optical microscope(OM),s... |
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| Keywords: | High strength aluminum alloy Electron beam welding Heat treatment Microstructure Mechanical properties |
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