| 2.25Cr-1Mo合金钢回火脆化过时效现象的研究 |
| |
| 引用本文： | 周昌玉,孙宇,张国栋.2.25Cr-1Mo合金钢回火脆化过时效现象的研究[J].特殊钢,2006,27(2):6-8. |
| |
| 作者姓名： | 周昌玉 孙宇 张国栋 |
| |
| 作者单位： | 南京工业大学机械与动力工程学院，南京 210009 |
| |
| 摘 要： | 研究了2.25Cr-1Mo合金钢在回火温度下时效处理时,发生回火脆化和回火脆化的过时效反偏聚现象。应用非平衡偏聚的动力学理论,确定了成分(%)为0.15C、2.32Cr、0.95Mo、0.009P的2.25Cr-1Mo合金钢在650℃140 h回火时钢中磷的非平衡晶界偏聚规律。试验得出,2.25Cr-1Mo合金钢650℃磷非平衡偏聚的临界时间tc为20 h,晶界磷的原子浓度,由初始状态的0.016%提高至最大值2.79%。根据试验数据进行的动力学计算,得出的计算曲线与试验结果吻合,验证了非平衡晶界偏聚空位-复合体模型的扩散机制。
|
| 关 键 词： | 2.25Cr-1Mo合金钢 回火脆化 非平衡偏聚 过时效 |
| 收稿时间： | 10 10 2005 12:00AM |
| 修稿时间： | 2005年10月10 |
A Study on Temper Embrittlement Overaging Phenomenon of Alloy Steel 2.25Cr-1Mo |
| |
| Zhou Changyu,Sun Yu,Zhang Guodong.A Study on Temper Embrittlement Overaging Phenomenon of Alloy Steel 2.25Cr-1Mo[J].Special Steel,2006,27(2):6-8. |
| |
| Authors: | Zhou Changyu Sun Yu Zhang Guodong |
| |
| Affiliation: | College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009 |
| |
| Abstract: | The tempering embrittlement and its overaging phenomenon (counter^segregation) of alloy steel 2.25Cr-1Mo at tempering temperature have been studied. The non-equilibrium segregation law of phosphorus in alloy steel 2.25Cr-1Mo (0.15C, 2.32Cr, 0.95Mo, 0.009P) tempering at 650 °C for 140 h was obtained with using the kinetics theory of non-equilibrium segregation r The test results showed that critical time tc of phosphorus non-equilibrium segregation in alloy steel 2.25Cr-1Mo at 650 ℃ was 20 h, at this time the atomic concentration of phosphorus at grain boundary increased to maximum value 2.79% from 0.016% at original status. According to kinetic calculation of test data, the obtained calculated curve conformed with the test results which verified the diflusion mechanism of non-equilibrium grain segregation for vacancy-complex model. |
| |
| Keywords: | Alloy Steel 2 25Cr-1Mo Temper Embrittlcmcnt Non-Equillbrium Segregation Overaging |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《特殊钢》浏览原始摘要信息 |
|
点击此处可从《特殊钢》下载全文 |
