| 加热速度和保温时间对X70钢组织与性能的影响 |
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| 引用本文： | 刘艳梅,路广平,曹雅彬,高俊星,孙志刚,李建一,肖福仁,廖波. 加热速度和保温时间对X70钢组织与性能的影响[J]. 金属热处理, 2012, 0(2): 49-53 |
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| 作者姓名： | 刘艳梅 路广平 曹雅彬 高俊星 孙志刚 李建一 肖福仁 廖波 |
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| 作者单位： | 燕山大学材料与科学工程学院;中国石油集团渤海石油装备制造有限公司 |
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| 基金项目： | 河北省科技支撑计划项目(09276705D);河北省自然科学基金(E2009000443) |
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| 摘 要： | 用Gleeble-3500型热模拟试验机研究了加热速度和保温时间对X70钢组织和性能的影响。结果表明,加热速度对奥氏体相变点及冷却后的组织和性能有显著影响。随加热速度的增加,相变点呈线性增加,而钢的强度和韧性降低。随着保温时间的延长,钢的强度在保温时间为60 s时达到最大值,随保温时间的进一步增加,强度呈降低的趋势;而且随加热温度的升高,降低的趋势更明显。而冲击韧性则随保温时间的延长呈降低趋势。
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| 关 键 词： | X70钢 加热速度 保温时间 组织与性能 |
Effects of heating rate and holding time on microstructure and mechanical properties of X70 steel |
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| LIU Yan-mei,LU Guang-ping,CAO Ya-bin,GAO Jun-xing,SUN Zhi-gang,LI Jian-yi,XIAO Fu-ren,LIAO Bo. Effects of heating rate and holding time on microstructure and mechanical properties of X70 steel[J]. Heat Treatment of Metals, 2012, 0(2): 49-53 |
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| Authors: | LIU Yan-mei LU Guang-ping CAO Ya-bin GAO Jun-xing SUN Zhi-gang LI Jian-yi XIAO Fu-ren LIAO Bo |
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| Affiliation: | 1(1.College of Materials Science and Engineering,Yanshan University,Qinhuangdao Hebei 066004,China;2.CNPC Bohai Equipment Manufacturing Co.,Ltd.,Qingxian Hebei 062658,China) |
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| Abstract: | The influences of heating rate and holding time on the microstructure and mechanical properties of X70 steel were studied by using Gleeble-3500 thermo mechanical simulator.The results show that the heating rate has great effect on phase transformation temperatures,microstructure and mechanical properties of the samples cooled to room temperature.With increasing the heating rates,the phase transformation temperature increases linearly,but the strength and impact toughness decrease.As the holding time increases,the strength of steel gets highest value when holding time is 60 s,while,further increasing the holding time,the strength decreases.Moreover,with the rise of heating temperature,the strength decreases significantly.However,the impact toughness decreases with increasing the holding time. |
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| Keywords: | X70 steel heating rate holding time microstructure and mechanical properties |
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