摘要
反应堆压力容器（RPV）模拟钢样品经880℃加热0．5h水淬，再经过660℃加热10h调质处理，随后在340～400℃进行不同时间的时效处理，测量了维氏硬度，并采用原子探针层析技术（atomprobetomography，APT）研究了富Cu团簇的析出过程。APT分析结果表明，RPV模拟钢淬火后经400℃时效100h的样品中析出了富Cu团簇，团簇的数量密度为1．69×10^23m^-3；模拟钢在调质处理后，经400℃时效1000h时效处理后才析出了富Cu团簇，团簇的数量密度为6×10^22m^-3。研究结果表明，同调质处理后时效相比，模拟钢淬火后直接时效可以更好地模拟RPV钢经中子辐照后富Cu团簇的析出。
Simulated reactor pressure vessel （RPV） model steel samples were heat treated at 880 ℃ for 0. 5 h and then water quenched and tempered at 660 ℃ for 10 h and finally aged at 300 -400 ℃for different time up to 12000 h. The precipitation of Cu-rich clusters in the simulated RPV model steel was investigated by means of atom probe tomography （APT） and hardness test. The results obtained by APT analysis show that the number density of Cu-rich clusters reaches 1.69 × 1023 m^-3 in the quenched specimen aged at 400 ℃ for 100 h. However, the number density of Cu-rich clusters merely reaches 6 × 1022m^- 3 in the quenched and tempered specimen aged at 400 ℃ for 1000 h. The results show that aging after quenching is a better process for simulation of Cu-rich clusters formation of RPV steel than the process of aging after quenching and tempering.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第12期114-119,共6页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(51271111)
关键词
反应堆压力容器模拟钢
原子探针层析技术
时效处理
富Cu团簇
simulated reactor pressure vessel （RPV） model steels
atom probe tomography （APT）
aging treatment
copper-rich cluster
