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| Ni/Al叠层薄壁筒形构件热态气压成形工艺 |
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王东君1,2, 邱高松3, 王 帅1,2, 高天翼1,2, 赵 杰1,2, 刘 钢1,2, 苑世剑1,2
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1.哈尔滨工业大学材料科学与工程学院，哈尔滨 150001;2. 哈尔滨工业大学金属精密国防热加工重点实验室，哈尔滨150001;3.北京动力机械研究所，北京 100074
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| 摘要: |
| NiAl基合金性能优异，具有成为下一代高温结构材料的潜力。然而，难变形NiAl基合金薄壁筒形构件的成形是阻碍其应用的主要难题。本文基于叠层材料的成形-反应制备工艺，以Ni、Al箔材为原料，首先制备了Ni/Al叠层圆柱筒坯，而后完成了Ni/Al叠层圆柱筒坯两端扩口密封，获得了质量良好、微观组织优异的扩口叠层圆柱筒坯。最终采用热态气压成形方法，制备了Ni/Al叠层圆-方变截面薄壁构件，为Ni/Al叠层薄壁复杂异形构件的成形提供了参考。 |
| 关键词: NiAl 基合金 薄壁筒形构件 热态气压成形 |
| 基金项目:国家自然科学基金项目（521***98） |
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| Hot-gas Processing of Ni/Al Laminated Thin-walled Tubular Component |
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Wang Dongjun1,2, Qiu Gaosong3, Wang Shuai1,2, Gao Tianyi1,2, Zhao Jie1,2, Liu Gang1,2, Yuan Shijian1,2
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1. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001;2. National Key Laboratory of Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001;3.Beijing Power Machinery Research Institute, Beijing 100074
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| Abstract: |
| The NiAl-based alloy has excellent properties and is supposed as the next generation of potentially high-temperature structural materials. However, the processing of the hard-to-deform NiAl-based alloy is the main problem hindering its application. Based on the forming-reactive preparation processing of laminated material, the Ni/Al laminated cylindrical billet is prepared from Ni and Al foils in this paper. Then, the flaring-sealing of Ni/Al laminated cylindrical billet are carried out, and the flaring laminated cylindrical billet with good quality and excellent microstructure is obtained. Finally, the Ni/Al laminated round-square variable section thin-walled component is prepared using hot-gas processing method, which provides a reference for the fabrication of Ni/Al laminated thin-walled complex special-shaped components. |
| Key words: NiAl-based alloy thin-walled tubular component hot-gas processing |
