采用新的包套热轧工艺方法,在普通轧机上成功制备出厚度为1.9 mm的高铌钛铝合金薄板,总变形量达到80%以上.整个轧制过程保持在近等温的状态下,平均轧制速率小于80 mm·s-1.显微组织观察表明,薄板组织均匀,轧制变形后的晶粒度略大于合金变形前的晶粒度.在动态再结晶与道次间回炉处理时发生的静态再结晶两种机制的作用下,发生了完全再结晶,因而不再具备变形组织的带状特征.板材的取向图显示存在<100>晶向平行于轧制方向的晶粒,其余晶粒的取向则呈现随机分布.锻态高铌钛铝合金包套热轧后织构组分存在{100}<010>的立方织构,这种织构是由再结晶引起的.
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