锆合金挤压管坯的组织及织构研究  

Study on the Microstructure and Texture of Zirconium Alloy Tube

作　　者：王丽霞[1] 张喜燕[1] 薛祥义 文惠民 李中奎[3] 

机构地区：[1]重庆大学,重庆400030 [2]西安西工大超晶科技发展有限责任公司,陕西西安710016 [3]西北有色金属研究院,陕西西安710016

出　　处：《稀有金属材料与工程》2013年第1期153-157,共5页Rare Metal Materials and Engineering

基　　金：国家"863"资助项目(2008AA031701)

摘　　要：采用XRD和EBSD技术,对不同挤压温度(650和630℃)的2种锆合金管坯的显微组织和宏观织构进行研究。结果表明,管坯内发生了动态回复和再结晶,其组织由沿挤压方向拉长的大晶粒与近似等轴的再结晶晶粒组成,管坯内再结晶晶粒的平均尺寸相近,分别为0.44和0.41μm,温度对显微组织无显著影响;挤压温度为650℃的管坯的织构主成分为<1010>纤维织构及{0001}<1010>,630℃挤压管坯的织构主成分为<1120>纤维织构及{0001}<1120>,并且后者基轴在管材横向的分布强度略高于径向分布。The microstructure and texture evolution of Zirconium tubes extruded at different temperatures have been investigated using X-ray diffraction （XRD） and electron backscatter diffraction （EBSD） technology. The results show that dynamic recovery and recrystallization occurred in the hot-extruded tubes. The microstructure consists of sub-grains containing small angle boundary and equiaxed grains. The temperature has no effect on the mean size of equiaxed grains. However, there is wide difference in texture at different temperatures. The texture component of the tube extruded at 650℃ consists of 〈1010〉 fiber and {0001} 〈1010〉, while the texture component is 〈112-0 〉fiber and {0001 }〈112-0 〉 with more basal poles in the tangential direction for the tube extruded at 630℃.

关 键 词：锆合金 挤压管坯 微观组织 织构 

分 类 号：TG379[金属学及工艺—金属压力加工]