| GH674高温合金的热变形行为 |
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| 引用本文： | 李佃国,尹法杰,李长荣.GH674高温合金的热变形行为[J].金属热处理,2005,30(8):5-7. |
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| 作者姓名： | 李佃国 尹法杰 李长荣 |
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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;钢铁研究总院,高温材料研究所,北京,100081;北京科技大学,材料科学与工程学院,北京,100083 |
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| 摘 要： | 采用Gleeble-1500热模拟机对GH674高温合金在应变速率为0.01s-1~1.0s-1、变形温度为950℃~1200℃、真应变为1的条件下的热变形行为进行了研究。结果表明,在试验研究的变形条件下,GH674型高温合金在热压缩变形过程中发生明显的动态再结晶;用Zener-Hollomon参数的指数函数能较好地描述该合金高温变形时的流变行为;所获得的峰值应力热变形方程为σp=21.3139ln.ε+9.580495×105/Τ-538.11638;其热变形激活能Q为373.7102803kJ/mol。
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| 关 键 词： | GH674高温合金 热压缩变形 流变应力 Zener-Hollomon参数 热变形激活能 |
| 文章编号： | 0254-6051（2005）08-0005-03 |
| 收稿时间： | 2004-12-28 |
| 修稿时间： | 2004年12月28 |
Hot Compressive Deformation Behavior of Superalloy GH674 |
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| LI Dian-guo,YIN Fa-jie,LI Chang-rong.Hot Compressive Deformation Behavior of Superalloy GH674[J].Heat Treatment of Metals,2005,30(8):5-7. |
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| Authors: | LI Dian-guo YIN Fa-jie LI Chang-rong |
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| Affiliation: | LI Dian-guo~ |
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| Abstract: | The hot compressive deformation behaviour of superalloy GH674 was investigated in the temperature range from 950 to 1200 and at strain rate range from 0.01s~(-1) to 1.0s~(-1) on Gleeble-1500 hot simulator.The experimental results show that the dynamic recrystallization occurs during hot compressive deformation of superalloy GH674,the flow behaviour of superalloy GH674 during hot deformation can be represented by a Zener-Hollomon parameter in the exponent style equation,the regressed expression is _p=21.3139ln+9.58049510~5/-538.11638.The hot deformation activation energy of superalloy GH674 during hot deformation is 373.7102803kJ/mol. |
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| Keywords: | GH674 superalloy hot compressive deformation flow stress Zener-Hollomon parameter hot deformation activation energy |
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