| 粉末冶金TiAl基合金排气阀的制备及性能 |
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| 引用本文： | 刘咏,黄伯云,贺跃辉,欧阳鸿武,郭景杰. 粉末冶金TiAl基合金排气阀的制备及性能[J]. 中国有色金属学报, 2000, 10(1): 59-64 |
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| 作者姓名： | 刘咏 黄伯云 贺跃辉 欧阳鸿武 郭景杰 |
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| 作者单位： | [1]中南工业大学粉末冶金国家重点实验室 [2]哈尔滨工业大学材料科学与工程学院 |
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| 基金项目： | 国家“8 63”高技术基金!资助项目 71 5-0 0 5-0 0 4 0 |
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| 摘 要： | 研究了粉末冶金ＴｉＡｌ基合金柴油机排气阀的近型成形技术。其要点为：采用元素粉末支元素Ｔｉ，Ａｌ粉末为主要原料，道德在刚模中冷压成排气阀菌部；然后在真空热压炉中，通过准等静压工艺，同时实现ＴｉＡｌ基合金的反应合成与近型成形，最后通过真空扩散联接工艺，使粉末冶金ＴｉＡｌ基合金菌部与铸态ＴｉＡｌ基合金杆部联接成完整的排气阀零件。通过发动机台架的初步试验表明，所制备的粉末冶金ＴｉＡｌ基合金排气阀表现出良好
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| 关 键 词： | TiAl基合金 柴油机 排气阀 近型成形 粉末冶金 |
Manufacture and properties of powder metallurgy TiAl based valves |
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| LIU Yong ,HUANG Bai yun ,HE Yue hui ,OUYANG Hong wu ,GUO Jing jie . State Key Laboratory for Powder Metallurgy,Central South University of Technology,Changsha ,P.R.China, . College of Material Science and Engineering,Ha. Manufacture and properties of powder metallurgy TiAl based valves[J]. The Chinese Journal of Nonferrous Metals, 2000, 10(1): 59-64 |
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| Authors: | LIU Yong HUANG Bai yun HE Yue hui OUYANG Hong wu GUO Jing jie . State Key Laboratory for Powder Metallurgy Central South University of Technology Changsha P.R.China . College of Material Science Engineering Ha |
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| Affiliation: | LIU Yong 1,HUANG Bai yun 1,HE Yue hui 1,OUYANG Hong wu 1,GUO Jing jie 2 1. State Key Laboratory for Powder Metallurgy,Central South University of Technology,Changsha 410083,P.R.China, 2. College of Material Science and Engineering,Ha |
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| Abstract: | The manufacturing method and properties of P/M TiAl based exhaust valves were investigated. The P/M TiAl based exhaust valves were prepared through elemental powder metallurgy (EPM), i.e. elemental Ti, Al powders were used as raw material. Firstly, the mixed elemental powders were cold pressed into a mushroomed head of the valve. Then the compacts were pseudo HIPed, in which both the material synthesis and near net shaping were realized at one step. Finally, the P/M TiAl based mushroomed valve heads were connected with the as cast TiAl based valve stems through diffusion joining technique. The primary results in diesel stand test using those valves prepared above showed that the diesel properties have met the requirements for practical application. |
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| Keywords: | powder metallurgy TiAl based alloy diesel exhaust valve near net shaping |
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