| 粉末冶金Ti-22Al-25Nb合金的真空热压烧结工艺 |
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| 引用本文： | 杨越,贾建波,刘文超,徐岩,陈晨,刘鑫刚,骆俊廷.粉末冶金Ti-22Al-25Nb合金的真空热压烧结工艺[J].中国机械工程,2018,29(10):1227. |
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| 作者姓名： | 杨越 贾建波 刘文超 徐岩 陈晨 刘鑫刚 骆俊廷 |
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| 作者单位： | 1.燕山大学先进锻压成形技术与科学教育部重点实验室，秦皇岛，066004
2.燕山大学亚稳材料制备技术与科学国家重点实验室，秦皇岛，066004 |
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| 基金项目： | 河北省自然科学基金资助项目（E2016203157）；
秦皇岛市科学与技术基金资助项目（E201602A008）；
燕山大学博士基金资助项目（B936）
Hebei Provincial Natural Science Foundation of China（No. E2016203157） |
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| 摘 要： | 以气雾化法获得的Ti-22Al-25Nb（at.%）预合金粉末为初始原料，采用真空热压烧结工艺方法制备组织致密、成分均匀的粉末冶金Ti-22Al-25Nb合金。应用有限元软件MSC.Marc对Ti-22Al-25Nb（at.%）预合金粉末的致密化过程进行数值模拟，分析了温度和压力对Ti-22Al-25Nb粉末致密化过程的影响，揭示了粉末相对密度随温度和压力变化的规律，得到优化的烧结工艺参数，以指导热压实验烧结。通过热压烧结实验制备了组织致密、成分均匀的Ti-22Al-25Nb合金，发现1 050 ℃/35 MPa/1 h条件下烧结的合金具有最优的室温和650 ℃高温综合力学性能。
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| 关 键 词： | Ti-22Al-25Nb预合金粉末 真空热压烧结 致密化过程 力学性能 |
Vacuum Hot-pressing Sintering Processes for a Powder Metallurgy Ti-22Al-25Nb Alloy |
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| YANG Yue,JIA Jianbo,LIU Wenchao,XU Yan,CHEN Chen,LIU Xingang,LUO Junting.Vacuum Hot-pressing Sintering Processes for a Powder Metallurgy Ti-22Al-25Nb Alloy[J].China Mechanical Engineering,2018,29(10):1227. |
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| Authors: | YANG Yue JIA Jianbo LIU Wenchao XU Yan CHEN Chen LIU Xingang LUO Junting |
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| Affiliation: | 1.Education Ministry Key Laboratory of Advanced Forging?﹠?Stamping Technology and Science， Yanshan University，Qinhuangdao， Hebei，066004
2.State Key Laboratory of Metastable Materials Science and Technology， Yanshan University， Qinhuangdao，Hebei，066004 |
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| Abstract: | A powder metallurgy （P/M） Ti-22Al-25Nb alloy with dense microstructure and uniform composition was prepared by using vacuum hot-pressing sintering method.The original powders were determined to be Ti-22Al-25Nb （at.%） pre-alloyed powders which obtained by aerosol method.The densification process of the Ti-22Al-25Nb （at.%） pre-alloyed powders was simulated numerically by using the finite element software MSC.Marc.The effects of temperature and pressure on the densification processes of the Ti-22Al-25Nb powders were analyzed.The evolution of relative densities varying with temperature and pressure was revealed herein.In addition， the optimized sintering parameters were obtained to guild the following hot-pressing sintering experiments.The dense P/M Ti-22Al-25Nb alloy with uniform composition was fabricated by hot-pressing sintering experiments.It may be observed that the alloy which is sintered at 1 050 ℃/35 MPa/1 h demonstrates the optimal mechanics properties at room temperature and 650 ℃， respectively. |
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| Keywords: | Ti-22Al-25Nb pre-alloyed powder vacuum hot-pressing sintering densification process mechanics property |
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