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| 贝氏体型冷作强化非调质钢的氢致延迟断裂行为 | |
| 引用本文： | 赵秀明,杨金峰,张永健,惠卫军,于同仁,王章忠.贝氏体型冷作强化非调质钢的氢致延迟断裂行为[J].材料工程,2012(3):47-51. |
| 作者姓名： | 赵秀明 杨金峰 张永健 惠卫军 于同仁 王章忠 |
| 作者单位： | 1. 南京工程学院材料工程学院,南京,211167 2. 钢铁研究总院先进钢铁材料技术国家工程研究中心,北京,100081 3. 马鞍山钢铁股份有限公司技术中心,安徽马鞍山,243002 |
| 基金项目： | 国家科技支撑计划资助项目(2007BAE30B04);南京工程学院基金项目(KXJ08135);江苏省高校科研成果产业化推进项目(JHB2011-25) |
| 摘 要： | 采用电化学充氢和慢拉伸应变速率实验(SSRT)研究了形变和时效处理对一种低碳-Mn-B-Ti系贝氏体型冷作强化非调质钢氢致延迟断裂行为的影响规律。结果表明,无论热轧态还是拉拔态试样,充氢后试样的耐延迟断裂性能显著降低。在拉拔变形初期,减面率γ<20%时,耐延迟断裂性能降低的幅度较大;而随着拉拔量的继续增加,耐延迟断裂性能降低的趋势变缓。实验料拉拔后进行时效处理有助于其耐延迟断裂性能的改善,当时效温度提高到200℃以上时这种改善作用比较明显。 |
| 关 键 词： | 延迟断裂 贝氏体型冷作强化非调质钢 冷变形 时效处理 氢陷阱 |
Hydrogen Induced Delayed Fracture Behavior of Cold Hardening Microalloyed Bainitic Steel |
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| ZHAO Xiu-ming , YANG Jin-feng , ZHANG Yong-jian , HUI Wei-jun , YU Tong-ren , WANG Zhang-zhong.Hydrogen Induced Delayed Fracture Behavior of Cold Hardening Microalloyed Bainitic Steel[J].Journal of Materials Engineering,2012(3):47-51. | |
| Authors: | ZHAO Xiu-ming YANG Jin-feng ZHANG Yong-jian HUI Wei-jun YU Tong-ren WANG Zhang-zhong |
| Affiliation: | 1(1 School of Material Engineering,Nanjing Institute of Technology,Nanjing 211167, China;2 National Engineering Research Center of Advanced Steel Technology, Central Iron and Steel Research Institute,Beijing 100081,China;3 Technical Center,Maanshan Iron & Steel Co.,Ltd.,Maanshan 243002,Anhui,China) |
| Abstract: | The hydrogen induced delayed fracture behavior of a newly developed low carbon Mn-B-Ti type cold hardening microalloyed bainitic steel was studied using electrochemical charging and slow strain rate test(SSRT).It is found that charging of hydrogen significantly impairs the delayed fracture property of specimen both at as-hot rolled and as-cold drawn conditions.The decrease of anti-delayed fracture property is more noticeable when cold drawing reduction γ is lower than 20%.However,aging treatment has a beneficial effect on improving the anti-delayed fracture property of cold drawn specimen,and this improvement is more noticeable when aging temperature is higher than 200℃. |
| Keywords: | delayed fracture cold-hardening microalloyed bainitic steel cold deformation aging treatment hydrogen trapping |
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