(1. 中南工业大学材料系，长沙 410083； 2. 宁夏905厂，石嘴山 753000)
摘 要: 对不同拉拔变形程度及不同温度退火后的钽丝织构，借助极图与现代ODF分析术进行了研究。结果表明钽丝的拉拔织构主要聚集在α-取向线上，形成〈110〉丝织构，织构组分主要有{441}〈110〉，{332}〈110〉，{334}〈110〉及{115}〈110〉。丝织构的形成与发展的主要特征可用{11 0}〈111〉位错滑移和轴对称变形的Taylor完全限制模型进行解释。两种不同减面率的钽丝具有明显不同的退火织构组分。77%冷拉减面率的钽丝退火后具有与 拉拔丝基本相同的织构组分，钽丝发生了原位再结晶。90%冷拉减面率的钽丝低温退火后产生同样的效果，然而经高温退火后出现新的织构组分{111}〈110〉和{111}〈112〉随退火温度的升高而增强，其形成由定向长大机制控制。
关键字: 钽丝；拉拔；退火；织构；电容器
（1. Department of Materials Science and Engineering,
Central South University of Technology, Changsha 410083, P. R. China
2. Ningxia 905 Factory, Shizuishan 753000, P.R.China）
Abstract: The cold drawing textures of the tantalum wires for different reductions in area and their recrystallization textures at different temperatures were investigated by pole figures and ODF. It was found that the <110> fiber texture was mainly gathered on the α-fibre and strengthened with the reduction in area; the texture components consisted of {441}<110>, {332}<110>, {334}<110> and {115}<110>, and the component {441}<110> was the strongest, the <110> fiber texture can be explained by the {110}<111> dislocation-slip. The corresponding simulation carried by using full constraints Taylor model showed a good result compared with the experimental one. There were two types of the annealing textures in two sizes of wires, the annealing of the drawn wires with 77% area reduction at different temperatures basically generated the same textures as their drawn wires had, the texture can be mainly attributed to continuous recrystallization; the same results were found in the annealed wires with 90% area reduction at low temperature. However, in the annealed wires at high temperatures, the new texture {111}<110>-{111}<11 2> was found, the formation of new components can be elucidated in terms of discontinuous recrystallization and the oriented growth.
Key words: texture; capacitor; tantalum wire; drawing; annealing
