热轧温度对NZ2锆合金第二相粒子的影响

Effects of Hot Rolling Temperature on Secondary Phase Particles of

摘要:

采用NZ2锆合金为研究对象，在相同加工率的条件下，选取不同的热轧温度800，700，650，610 ℃，制得厚度为1.4 mm的板材样品。通过金相，扫描电镜及透射电镜观察合金中第二相的分布、种类，并进一步使用软件统计了第二相的大小及分布规律。结果表明，大多数第二相位于晶粒内部，少数位于晶界处。第二相粒子主要为球形及棒状。选择较低的热轧温度(650 ℃)可以得到均匀、细小，弥散分布的第二相

Abstract:

NZ2 zirconium alloy plate samples of 1.4 mm thickness were prepared at different hot rolling temperatures of 800, 700, 650 and 610 °C but under the same rolling reduction. The distribution and types of the secondary phases in the alloy were observed by OM, SEM and TEM. Furthermore, their sizes were calculated and the distribution rule was obtained by software. Results show that most secondary phases are in the grains while a few in the grain boundary. They are mainly spherical or claviform. Homogeneous and fine secondary phases distributing dispersively can be obtained at a lower rolling temperature (650 °C)