航空材料学报2012，Vol.32Issue(3)：5-9,5.DOI:10.3969/j.issm.1005-5053.2012.1.001
利用TDS研究二次硬化钢中氢的扩散行为
Investigation of Hydrogen Diffusion in Secondary Hardening Steel by Means of Thermal Desorption Spectrometry
郭昀静 1王春芳 2李建锡 2王毛球1
作者信息
- 1. 昆明理工大学材料科学与工程学院,昆明650093
- 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
- 折叠
摘要
Abstract
Hydrogen diffusion and its effect on ductility of a secondary hardening steel have been investigated by means of Thermal Desorption Spectrometry (TDS) and slow strain rate tensile tests (SSRT). Results show that the hydrogen diffusion coefficient in the investigated steel is 3. 42 X 10-!cm2 · S-1 , and it is evidently lower than those in usually quenched and tempered martensitic steels, which is presumably due to lots of fine carbides in the steeL TDS analysis shows that there are two hydrogen desorption peaks and the desorption activation energy values are 20. 2kJ· mol-1 and 24. 6kJ·mol-1' respecilvely, which are caused by weak hydrogen traps such as grain boundaries and dislocations. The reduction of area of the SSRT specimen decreased linearly with the hydrogen content When the hydrogen content reached 5 × 10-4% , the reduction of area was less than 10% , and the fracture surface was intergranular.关键词
二次硬化钢/氢脆/TDS/慢速拉伸试验/扩散系数Key words
secondary hardening steel/ hydrogen embrittlement/ thermal desorption spectrometry (TDS) / alow strain rate test ( SSRT) , hydrogen diffusion coefficient分类
矿业与冶金引用本文复制引用
郭昀静,王春芳,李建锡,王毛球..利用TDS研究二次硬化钢中氢的扩散行为[J].航空材料学报,2012,32(3):5-9,5.
