先进压水堆国产新锆合金内压爆破力学性能研究  

Study on the Mechanical Performance of the Internal Pressure Blasting of the Domestic New Zirconium Alloy in the Advanced PWR

作　　者：朱勇辉[1] 杨忠波[1] 洪晓峰[1] 朱其猛 ZHU Yong-hui;YANG Zhong-bo;HONG Xiao-feng;ZHU Qi-meng(Nuclear Power Institute of China,Chengdu,Sichuan Prov.610041,China)

机构地区：[1]中国核动力研究设计院,四川成都610041

出　　处：《中国核电》2019年第1期46-50,共5页China Nuclear Power

摘　　要：采用内压爆破实验研究了去应力、部分再结晶及再结晶退火状态的SZA-4、SZA-6两种国产新锆合金室温及385℃下的内压爆破性能,用SEM分析了爆破断口形貌特征。结果表明,在两种试验温度下,合金管材爆破压力及屈服压力随退火温度的升高呈下降趋势,再结晶态管材延伸率整体高于去应力态以及部分再结晶态管材。爆破断口均为细小韧窝形貌,并存在轴向的微裂纹,爆破过程为由内壁向外壁的韧性撕裂。The internal pressure blasting experiments were carried out to study the blasting performance of the internal pressure of the new zirconium alloy SZA-4 and SZA-6 at room temperature and 385℃, under the states of stress elimination, partial recrystallization and recrystallization. The characteristics of blasting fracture morphology were analyzed with SEM technology. The measured results showed that the alloy pipe blasting pressure and the yield stress declined along with the increase of annealing temperature. The elongations of recrystallization alloy pipes were all higher than that of the stress elimination and partial recrystallization state. The blasting fracture showed many small fossas and micro cracks in the axial direction, which proved that the blasting process was a tear from the inner wall to the outer wall.

关 键 词：锆合金 内压爆破 力学性能 先进压水堆 

分 类 号：TM623[电气工程—电力系统及自动化]