聚变堆用9Cr-1.5WVTa低活化马氏体钢的热物理性能研究  

Study on Thermal Physical Properties of 9Cr-1.5WVTa Low Activation Martensitic Steel for Fusion Reactor

作　　者：何西扣[1] 朱衍勇[1,2] 万发荣[2] 乔建生 

机构地区：[1]钢铁研究总院分析测试研究所,北京100081 [2]北京科技大学材料物理与化学系,北京100083 [3]中国原子能科学院,北京102413

出　　处：《物理测试》2011年第3期25-29,共5页Physics Examination and Testing

基　　金：国家自然科学基金项目(50771017);973基金项目(2008CB717802)

摘　　要：基于中国正在研究的聚变堆用9Cr-1.5 WVTa低活化马氏体钢(CLAM钢),采用膨胀仪测量了两组不同硅含量CLAM钢从100℃到700℃的热膨胀系数,利用激光闪光法测量两组试样从室温到700℃的热扩散率、比热及热导率等热物性参数。所得试验数据按照多项式拟合绘图并与F82 H比较。结果显示:CLAM钢的热膨胀性能比F82 H稍好,而导热性能则相对较差;未添加质量分数为0.2%硅的CLAM钢具有较优良的热物理性能,热膨胀系数低,热导率高,这种差别主要原因在于硅含量低的CLAM钢的原奥氏体晶粒尺寸较粗大、晶界较少。Based on the new Chinese low activation martensitic（CLAM） steel being developed for fusion reactor,the dilatometer and laser flash method were used to measure thermal expansion,thermal diffusivity,specific heat and thermal conductivity of two heats of CLAM steels with different silicon contents,thermal expansion property test temperature range was from 100℃ to 700℃,thermal conductivity properties test temperature range was from room temperature to 700℃.The experimental data were described by polynomial fitting equation and compared with data from F82H steel.The results showed that CLAM steel had mean better thermal expansion and poor thermal conductivity than F82H steel.CLAM steel without adding 0.2%Si was found to have slightly lower thermal expansion and significantly higher thermal conductivity and these differences appeared to be due to the lower silicon content resulted in larger prior austenite grain size and less grain boundary.

关 键 词：9Cr-1.5WVTa钢 低活化 热物理性能 硅 聚变堆 

分 类 号：TL341[核科学技术—核技术及应用]