| 温度、应变率和晶粒对Mn18Cr18N钢高温塑性的影响 |
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| 引用本文： | 魏新鹏,何文武,刘建生.温度、应变率和晶粒对Mn18Cr18N钢高温塑性的影响[J].太原重型机械学院学报,2010(4):296-299. |
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| 作者姓名： | 魏新鹏 何文武 刘建生 |
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| 作者单位： | 太原科技大学材料科学与工程学院,太原030024 |
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| 基金项目： | 国家自然科学基金（50675146）; 十一五支撑计划项目（2007BAF02B07） |
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| 摘 要： | 通过拉伸热模拟试验研究了温度、应变率和晶粒尺寸对Mn18Cr18N高氮奥氏体不锈钢高温塑性的影响。结果表明：在800℃~1 200℃温度范围内,Mn18Cr18N高氮奥氏体不锈钢的塑性随温度升高而升高,1 200℃时达到最好,然后开始下降;应变率通过再结晶的作用而影响塑性;当温度低于1100℃时,细晶粒尺寸材料的塑性优于粗晶粒尺寸,而温度高于1 100℃时中等晶粒尺寸材料塑性最好。
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| 关 键 词： | Mn18Cr18N钢 温度 应变率 晶粒尺寸 热塑性 |
Effects of Temperature,Strain Rate and Grain on the Hot Ductility of Mn18Cr18N Steel |
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| WEI Xin-peng,HE Wen-wu,LIU Jian-sheng.Effects of Temperature,Strain Rate and Grain on the Hot Ductility of Mn18Cr18N Steel[J].Journal of Taiyuan Heavy Machinery Institute,2010(4):296-299. |
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| Authors: | WEI Xin-peng HE Wen-wu LIU Jian-sheng |
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| Affiliation: | (School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China) |
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| Abstract: | In this paper,the Effects of temperature,strain rate and grain size on the hot ductility of Mn18Cr18N of high-nitrogen austenitic stainless steels were studied by thermal simulated test of tension.The results show that the hot ductility of Mn18Cr18N increases with the increase of test temperature when the deformation temperature is between 800 ℃ and 1 100 ℃.The steel exhibits a peak plasticity at 1 200 ℃,and then the hot ductility reduces with the increase of test temperature.The effect of strain rate on the hot ductility of Mn18Cr18N steel is caused by recrystallization.The hot ductility of Mn18Cr18N steel with fine graines is better than with coarse grains at temperature below 1 100 ℃.Above 1 100 ℃,however,the hot ductility with moderate grains is the best. |
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| Keywords: | Mn18Cr18N steel temperature strain rate grain size hot ductility |
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