| 某新型粉末高温合金的高温变形与动态再结晶 |
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| 引用本文： | 刘建涛,陈焕铭,胡本芙,刘国权,张义文.某新型粉末高温合金的高温变形与动态再结晶[J].兵器材料科学与工程,2004,27(4):10-13. |
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| 作者姓名： | 刘建涛 陈焕铭 胡本芙 刘国权 张义文 |
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| 作者单位： | 北京科技大学,材料科学与工程学院,北京,100083;钢铁研究总院高温材料研究所,北京,100081 |
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| 摘 要： | 运用Gleeble-1500 热模拟机,对热等静压态的某新型粉末高温合金进行了形变温度在1120-1170℃和应变速率在2×10-3-2×10-1s-1下的高温变形与动态再结晶行为研究。研究表明:该合金在高温变形时应力-应变曲线上峰值应力σp与温度T和应变速率ε之间符合下式关系:Z=ε·exp(Qa/RT)=A2σpn。在一定的变形条件下,通过高温变形过程中的动态再结晶能获得细晶组织,其动态再结晶晶粒平均尺寸与Zener-Hollomon参数呈双对数线性关系。
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| 关 键 词： | 粉末高温合金 高温变形 动态再结晶 Z参数 |
| 文章编号： | 1004-244X(2004)04-0010-04 |
| 修稿时间： | 2003年11月3日 |
High temperature deformation and dynamic recrystallization of a new type of P/M superalloy |
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| LIU Jian - tao,CHEN Huan - ming,HU Ben-fu,LIU Guo - quan,ZHANG Yi - wen.High temperature deformation and dynamic recrystallization of a new type of P/M superalloy[J].Ordnance Material Science and Engineering,2004,27(4):10-13. |
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| Authors: | LIU Jian - tao CHEN Huan - ming HU Ben-fu LIU Guo - quan ZHANG Yi - wen |
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| Abstract: | High temperature deformation and dynamic recrystallization behavior of as - hipped P/M superalloy at 1 120℃-1 170℃, with strain rate at 2 × 10-3s-1- 2 × 10-1s-1were studied by means of isothermal compression test at Gleeble -1 500 thermal mechanical simulator. The results show that the peak flow stress (σp) can be correlated with temperature ( T) and strain rate (ε) by the following equation: Z = ε ?exp( Qa/RT) = A2σpn. Refined grain can be obtained under certain deformation condition, The natrual logarithm of dynamic recrystallization grain size is linear with the natrual logarithm of Zen-er - Hollomon parameter. |
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| Keywords: | P/M superalloy hot deformation dynamic recrystallization Zener - Hollomon parameter |
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