| 基于Al元素界面调控的镁/钛激光熔钎焊接特性 |
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| 引用本文： | 檀财旺,张凯平,陈波,李俐群,冯吉才.基于Al元素界面调控的镁/钛激光熔钎焊接特性[J].焊接学报,2016,37(5):57-60. |
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| 作者姓名： | 檀财旺 张凯平 陈波 李俐群 冯吉才 |
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| 作者单位： | 1.哈尔滨工业大学(威海)山东省特种焊接技术重点实验室, 威海 264209;哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001 |
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| 基金项目： | 国家自然科学基金资助项目(51504074),山东省自然科学基金资助项目(BS2015ZZ008) |
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| 摘 要： | 文中选用含Al量元素含量为9%(质量分数)的AZ91焊丝作为填充钎料,采用激光填丝熔钎焊的方法,利用焊丝中Al元素配合激光局部加热的特性改善非互溶不反应镁/钛之间的界面反应. 探索工艺参数对焊接质量的影响规律,分析焊接接头力学性能及组织特征. 结果表明,添加AZ91焊丝能够实现AZ31B镁合金/TC4钛合金的可靠连接,接头最大载荷达到1 520 N,发现焊丝中Al元素能够在激光快速加热冷却过程中偏聚到界面,并与钛侧发生冶金反应生成AlTi3化合物,界面由较薄的反应层(2 μm以下)组成,达到既实现界面冶金结合,又将反应层厚度控制在不影响接头力学性能的范围之内.
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| 关 键 词： | 镁合金 钛合金 激光熔钎焊 界面组织 |
| 收稿时间： | 2015/10/11 0:00:00 |
Laser welding-brazing characteristics of Mg/Ti based on Al controlling interfacial reaction |
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| TAN Caiwang,ZHANG Kaiping,CHEN Bo,LI Liqun and FENG Jicai.Laser welding-brazing characteristics of Mg/Ti based on Al controlling interfacial reaction[J].Transactions of The China Welding Institution,2016,37(5):57-60. |
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| Authors: | TAN Caiwang ZHANG Kaiping CHEN Bo LI Liqun and FENG Jicai |
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| Affiliation: | 1.Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China;State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China2.Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China3.State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China |
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| Abstract: | Interfacial reaction of immiscible and nonreactive Mg/Ti dissimilar joint was improved by Al element from AZ91 Mg based filler (9 wt.%), coupled with laser local heating characteristics of laser welding-brazing method. The effect of the process parameters on weld quality was investigated. Microstructure and mechanical properties was then analyzed. The results indicated that reliable joining was achieved between Mg alloy and Ti alloy using AZ91 filler. The maximum tensile-shear force could reach 1 520 N. Segregation of Al element at the interface from filler was observed after laser fast heating and cooling, and reacted with Ti resulting in newly formed compound AlTi3. The thickness of reaction layer was ultra-thin at approximately 2 μm. Above all, metallurgical bonding was realized while the thickness of reaction layer was kept below a certain value which did not affect the mechanical properties. |
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| Keywords: | magnesium alloy titanium alloy laser welding-brazing interfacial microstructure |
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