论文部分内容阅读
以Zr-1.0Sn-1.0Nb-Fe合金为研究对象,对其挤压管坯、一次冷轧管坯及二次冷轧管坯进行真空退火处理,并采用偏光显微镜对每道次退火后的金相组织进行观察分析,研究了不同挤压温度以及不同退火制度对Zr-Sn-Nb-Fe合金再结晶退火处理的影响。结果表明:同一加工态下,600℃的挤压管坯在640℃/2 h退火发生再结晶程度大于640℃的挤压管坯,再结晶温度随挤压温度的降低而降低;在600℃的退火温度下,延长保温时间对锆合金再结晶程度影响不大;对挤压管坯、一次冷轧管坯的最佳退火温度为600℃/2 h,二次冷轧管坯的最佳退火温度为580℃/2 h或590℃/2 h。
Taking Zr-1.0Sn-1.0Nb-Fe alloy as the research object, the extruded tube, primary cold rolled tube and secondary cold rolled tube were vacuum annealed and the microstructure of each sample after annealing The microstructure was observed and analyzed. The effects of different extrusion temperatures and different annealing regimes on the recrystallization annealing of Zr-Sn-Nb-Fe alloy were investigated. The results show that under the same working condition, the extruded tube with 600 ℃ is annealed at 640 ℃ for 2 h, and the recrystallization degree is higher than 640 ℃. The recrystallization temperature decreases with the decrease of extrusion temperature. Annealing temperature, prolonging the holding time has little effect on the degree of recrystallization of zirconium alloy. For the extruded tube, the optimum annealing temperature of primary cold rolled tube is 600 ℃ / 2 h, Annealing temperature is 580 ℃ / 2 h or 590 ℃ / 2 h.