EFFECT OF HEAT TREATMENT ON THE MICROSTRUCTURE AND PROPERTIES OF 9Cr2WVTa REDUCED ACTIVATION STEELS

摘要：

　　The creep property of 9Cr2WVTa reduced activation steels(RAS)was studied after the optimized heat treatment,which was chosen based on the microstructure and tensile property under different heat treatment process.The microstructure and tensile fracture surfaces were observed by optical microscopy(OM)and SEM.The results show that there were significantly difference in the microstructure and tensile property of the 9Cr2WVTa RAS after different heat treatment process.According to the assessment method of static toughness,the optimized heat treatment process was chosen,which got the best static toughness on the promise of good ductility.The minimum creep rate and creep life of 9Cr2WVTa RAS under the optimized heat treatment was analyzed,the results show that the stress exponent was 27,indicating the dislocation creep mechanism.By using the extrapolation,the creep limit was estimated to be 209MPa when the minimum creep rate was 10-7%/h at 813K,which was comparable to EUROFER steels.

关键词： 9Cr2WVTa reduced activation steels Heat treatment Microstructure Tensile properties Creep properties

作者: Mengshuan Lei SenYang

作者单位: School of Materials Science and Engineering,Nanjing University of Science and Technology Xiaolingwei 200 Nanjing,210094,P.R.China

会议类型: 国际会议

会议名称: Energy Materials 2014(第一届能源材料国际会议)

会议地点: 西安

会议语种:英文

页码: 551-556

在线出版日期: 2014-11-04（万方平台首次上网日期，不代表论文的发表时间）