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材料工程  2018, Vol. 46 Issue (9): 115-121    DOI: 10.11868/j.issn.1001-4381.2016.001270
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
Cr含量对Ti5Mo5V3Al-Cr系合金等温相变动力学和TTT图的影响
吴楠, 崔雪飞, 魏衍广, 陶海明, 罗峥
北京有色金属研究总院 粉末冶金及特种材料研究所, 北京 100088
Effect of Cr Content on Isothermal Transformation Kinetics and TTT Diagram of Ti5Mo5V3Al-Cr Alloys
WU Nan, CUI Xue-fei, WEI Yan-guang, TAO Hai-ming, LUO Zheng
Powder Metallurgy and Special Materials Research Department, General Research Institute for Nonferrous Metals, Beijing 100088, China
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摘要 采用原位热膨胀法,结合XRD分析研究不同Cr元素含量(1.0%,3.0%,5.0%,7.0%和9.0%,质量分数)的Ti5Mo5V3Al-Cr系合金在420,520,620℃时效过程中的相变化量与时间的关系。根据Johnson-Mehl-Avrami方程,拟合得到Ti5Mo5V3Al-Cr系合金的相关动力学参数,建立该系合金的动力学方程。通过实验结果和理论计算结果,绘制Ti5Mo5V3Al-Cr系合金的时间-温度-转变(TTT)对比曲线。结果表明:动力学方程计算结果与实验结果具有良好的一致性;1Cr和3Cr合金在实验温度范围内均具有较快的相变速率;5Cr和7Cr合金的等温相变对温度敏感,"鼻温区"在550℃左右;9Cr合金则在实验温度范围内均具有较慢的相变速率,无明显"鼻温区"。
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吴楠
崔雪飞
魏衍广
陶海明
罗峥
关键词 Cr含量Ti5Mo5V3Al-Cr系合金相变动力学方程TTT曲线    
Abstract:The relationship between phase transformation and time of Ti5Mo5V3Al-Cr (Cr content is 1.0%,3.0%,5.0%,7.0% and 9.0%,mass fraction) alloys at 420,520,620℃was studied by in-situ thermal expansion and XRD method. According to the Johnson-Mehl-Avrami equation and experimental results,the kinetic parameters of Ti5Mo5V3Al-Cr alloys were obtained by fitting, and the dynamic equation of the system was established. Furthermore,based on the experimental results and theoretical calculation results, the time temperature transformation (TTT) contrast curve of Ti5Mo5V3Al-Cr alloys was plotted. The results show that the calculated results are in good agreement with the experimental results. Besides, 1Cr and 3Cr alloys have a fast phase change speed in the test temperature range of 420,520,620℃; 5Cr and 7Cr alloys have the fastest alpha phase transition velocity at the "nose temperature zone" of 550℃. The "nose temperature zone" of 9Cr alloy is not obvious, which means that the phase transition rate is slow.
Key wordsCr content    Ti5Mo5V3Al-Cr alloy    phase transformation    dynamic equation    TTT diagram
收稿日期: 2016-10-26      出版日期: 2018-09-19
中图分类号:  TG146.2  
通讯作者: 崔雪飞(1977-),男,博士,高级工程师,主要从事高强高韧钛合金的研究,联系地址:北京市怀柔区雁栖经济开发区兴科东大街11号北京有色金属研究总院(101407),E-mail:carolcruise@sina.cn     E-mail: carolcruise@sina.cn
引用本文:   
吴楠, 崔雪飞, 魏衍广, 陶海明, 罗峥. Cr含量对Ti5Mo5V3Al-Cr系合金等温相变动力学和TTT图的影响[J]. 材料工程, 2018, 46(9): 115-121.
WU Nan, CUI Xue-fei, WEI Yan-guang, TAO Hai-ming, LUO Zheng. Effect of Cr Content on Isothermal Transformation Kinetics and TTT Diagram of Ti5Mo5V3Al-Cr Alloys. Journal of Materials Engineering, 2018, 46(9): 115-121.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001270      或      http://jme.biam.ac.cn/CN/Y2018/V46/I9/115
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