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| TiAl基合金的非晶钎焊 |
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王彦芳1, 王存山1, 高强1, 董闯1, 霍树斌2, 王佳杰2
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1.大连理工大学, 三束材料改性国家重点实验室, 大连 116024;2.哈尔滨焊接研究所, 哈尔滨 150080
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| 摘要: |
| 利用一种典型的块体非晶成分Zr65Al7.5Cu27.5(摩尔分数,%),制备成非晶条带焊接TiAl基合金,研究了焊接接头的组织结构和成分分布,并分析了钎焊过程的组织演变规律。研究结果表明,利用Zr65Al7.5Cu27.5非晶条带可以成功焊接TiAl基合金。焊缝区组织出现了明显的分层现象,从中部到界面区依次是先析出的Zr2Cu型和ZrCu化合物,粗大的Zr2Cu型化合物和Ti2Al型柱状晶。焊接母材中的Al元素向焊缝发生了扩散,在界面区形成了一层很薄的反应层。 |
| 关键词: 钎焊 非晶合金 TiAl基合金 |
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| Brazing of a TiAl-based alloy with Zr65Al7.5Cu27.5 amorphous ribbon |
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Wang Yan-fang1, Wang Cun-shan1, Gao Qiang1, Dong Chuang1, HUO Shu-bin2, WANG Jia-jie2
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1.State Key Laboratory for Materials Modification and Department of Materials Engineering, Dalian University of Technology, Dalian 116024, China;2.Harbin Welding Institute, Harbin 150080, China
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| Abstract: |
| In this paper, the melt-spun Zr65Al7.5Cu27.5 amorphous alloy, a typical bulk metallic glass with high glass ability, was used to braze a TiAl-based alloy. The mierostructure and elements distribution have been studied. The results show that the Zr65Al7.5Cu27.5 amorphous ribbons can successfully braze the TiAl-based alloy. Layered structures appear in the brazing seam. From the middle region to the interface region of the brazing seam, the miorestures are the Zr2Cu-type and ZrCu precipitates,the coarse Zr2Cu type grains, and the Ti2Al-type columnar grains. The Al element in the substrate diffuses into the brazing seam, forming a thin reaction layer in the interface region. |
| Key words: brazing amorphous alloy TiAl-based alloy |
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