显微硬度法分析核电站主管道热老化趋势  

Evaluation of Thermal Aging Effect on Primary Pipe Material in Nuclear Power Plant by Micro Hardness Test Method

作　　者：薛飞[1,2] 余伟炜[2] 王兆希[2] 马芹征 刘伟[1] 

机构地区：[1]清华大学材料科学与工程系,北京100084 [2]苏州热工研究院,江苏苏州215004

出　　处：《原子能科学技术》2012年第7期809-814,共6页Atomic Energy Science and Technology

基　　金：国家科技重大专项课题资助项目(2011ZX06004002);863计划资助项目(2008AA031701)

摘　　要：使用显微维氏硬度计和冲击试验机研究了核电站主管道材料Z3CN20.09M在400℃加速热老化10 000h前后的力学性能变化。结果表明,热老化导致试验材料的冲击吸收能下降;构成试验材料的铁素体相的显微维氏硬度上升,奥氏体相的显微维氏硬度基本保持不变。通过研究材料组织特征,剖析显微硬度与冲击韧性的关系,探索将显微硬度测试方法作为核电站主管道材料热老化趋势预测方法的可能性。The investigation was carried out on the changes in mechanical properties of the primary pipe material Z3CN20.09M after 10 000 h aging at 400 ℃ by using micro-Vickers and impact testing machine.The results show that the impact energy of testing material decreases.However,the micro-Vickers hardness of ferrite phase and austenite phase which constitute the testing material increase and keep constant,respectively.The intrinsic relations were analyzed between the micro-Vickers hardness and the impact energy to make an attempt to present the micro-Vickers hardness measurement as a method applicable to evaluating the thermal aging of the primary pipe material.

关 键 词：热老化 核电站 主管道 显微硬度 

分 类 号：TG142.24[一般工业技术—材料科学与工程]