C630R新型马氏体耐热转子钢的热变形行为研究
TG142; 通过Gleeble-3800试验机,开展了C630R转子钢在温度1 000～1 200℃、应变速率0.01～1 s-1条件下的热压缩试验,研究了热变形行为及不同工艺参数对其显微组织的影响,计算了C630R转子钢的本构方程,并绘制了真应变为0.8时的热加工图.结果表明,C630R转子钢的流变应力随变形温度升高和应变速率减小而降低;随着变形温度升至1 200℃,或者应变速率降至0.01 s-1,C630R转子钢更倾向于产生动态再结晶.利用修正的流变应力曲线,计算出C630R转子钢的热变形激活能Q 为530.155 kJ/mol,本构方程为ε=5.85×1018[sinh(0.011...
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| Published in | 特殊钢 Vol. 45; no. 3; pp. 56 - 61 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
钢铁研究总院有限公司 特殊钢研究院,北京 100081%中国一重天津重型装备工程研究有限公司,天津 300457
2024
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1003-8620 |
| DOI | 10.20057/j.1003-8620.2023-00220 |
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| Abstract | TG142; 通过Gleeble-3800试验机,开展了C630R转子钢在温度1 000～1 200℃、应变速率0.01～1 s-1条件下的热压缩试验,研究了热变形行为及不同工艺参数对其显微组织的影响,计算了C630R转子钢的本构方程,并绘制了真应变为0.8时的热加工图.结果表明,C630R转子钢的流变应力随变形温度升高和应变速率减小而降低;随着变形温度升至1 200℃,或者应变速率降至0.01 s-1,C630R转子钢更倾向于产生动态再结晶.利用修正的流变应力曲线,计算出C630R转子钢的热变形激活能Q 为530.155 kJ/mol,本构方程为ε=5.85×1018[sinh(0.011 4σ)]4.852?exp(-530 155/RT),绘制了真应变为0.8时的热加工图.结合显微组织,C630R转子钢在真应变0.8时合理的热加工工艺参数为变形温度1 075～1 200℃,应变速率0.01～0.11 s-1. |
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| AbstractList | TG142; 通过Gleeble-3800试验机,开展了C630R转子钢在温度1 000～1 200℃、应变速率0.01～1 s-1条件下的热压缩试验,研究了热变形行为及不同工艺参数对其显微组织的影响,计算了C630R转子钢的本构方程,并绘制了真应变为0.8时的热加工图.结果表明,C630R转子钢的流变应力随变形温度升高和应变速率减小而降低;随着变形温度升至1 200℃,或者应变速率降至0.01 s-1,C630R转子钢更倾向于产生动态再结晶.利用修正的流变应力曲线,计算出C630R转子钢的热变形激活能Q 为530.155 kJ/mol,本构方程为ε=5.85×1018[sinh(0.011 4σ)]4.852?exp(-530 155/RT),绘制了真应变为0.8时的热加工图.结合显微组织,C630R转子钢在真应变0.8时合理的热加工工艺参数为变形温度1 075～1 200℃,应变速率0.01～0.11 s-1. |
| Abstract_FL | Thermal compression test of C630R rotor steel was carried out by Gleeble-3800 thermal simulation testing ma-chine at temperature range of 1 000-1 200℃and strain rate of 0.01-1 s-1,the thermal deformation behavior and the influ-ence of different process parameters on the microstructure were studied,the constitutive equation and hot processing map of the C630R rotor steel at true strain of 0.8 was constructed.The experimental results indicate that the true stress of the C630R rotor steel decreases with the enhancement of deformation temperatures to 1 200℃and the reduction of true strain rate to 0.01 s-1.When the deformation temperature is higher and the compression strain rate is lower,C630R rotor steel is preferred to produce dynamic recrystallization.Thermal deformation activation energy Q of the C630R rotor steel is calcu-lated to be 530.155 kJ/mol by using the corrected flow stress curves,and the constitutive equation is ε=5.85×1018[sinh(0.011 4σ)]4.852?exp(-530 155/RT),the processing maps at true strain of 0.8 are plotted.The reasonable ther-mal processing parameters for C630R rotor steel under true strain of 0.8 is:deformation temperature of 1 075-1 200℃,strain rate of 0.01-0.11 s-1. |
| Author | 何西扣 霍洁 唐正焮 邱佳佳 |
| AuthorAffiliation | 钢铁研究总院有限公司 特殊钢研究院,北京 100081%中国一重天津重型装备工程研究有限公司,天津 300457 |
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| Author_FL | Tang Zhengxin He Xikou Qiu Jiajia Huo Jie |
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| DocumentTitle_FL | Research on the Thermal Deformation Behavior of C630R New Martensitic Heat-resistant Rotor Steel |
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| Keywords | Deformation Temperatures Hot Processing Map 应变速率 变形温度 C630R转子钢 Constitutive Equation 热加工图 本构方程 C630R Rotor Steel Strain Rate |
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| Title | C630R新型马氏体耐热转子钢的热变形行为研究 |
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