Ti-2Al-2．5Zr钛合金丝材的普通退火工艺  

Common Annealing Process of Ti-2Al-2.5Zr Titanium Alloy Wires

作　　者：王海波[1,2] 毛小南[1,2] 洪权[2] 

机构地区：[1]陕西科技大学机电工程学院,陕西西安712081 [2]西北有色金属研究院钛合金研究所,陕西西安710016

出　　处：《热加工工艺》2009年第8期34-37,共4页Hot Working Technology

摘　　要：研究了退火温度对Ti-2Al-2.5Zr钛合金丝材力学性能、显微组织的影响规律,并分析了该合金丝材退火后的织构。结果表明,在相变点之下,合金力学性能、显微组织只与再结晶有关;经(700～750)℃×1h.AC的真空退火,可获得均匀细小的等轴组织,强度、塑性达到最佳匹配。在相变点之上,获得锯齿状的粗大晶粒,强度较高,而塑性较差。退火后可获得两种织构,一种为在相变点之下,经完全再结晶退火可获得<2,-1,-1,0>丝织构;另一种为在相变点之上获得,该织构除了具有前一种丝织构外,还具有相对较弱的<2,-1,-1,3>丝织构。The effects of annealing temperature on the mechanical properties and microstructure of Ti-2Al-2.5Zr titanium alloy wires were studied, and the texture of Ti-2Al-2.SZr titanium alloy after annealing was analyzed. The results show that mechanical properties and microstructure only relate to recrystallization below the transformation point. After 700-750℃ vacuum annealing, the equiaxed microstructure is obtained, which is uniform and thin, the strength and plastic are the best matching. But above the transformation point, the crystal grains become larger and mechanical properties can not reach the requirement. There are two types of texture after annealing, the one is 〈2,-1,-1,0〉, the other is 〈2,-1,-1,3〉.

关 键 词：Ti-2Al-2.5Zr丝材 退火温度 组织 力学性能 织构 

分 类 号：TG146.23[一般工业技术—材料科学与工程]