钽材轧制和再结晶织构演变研究进展

发布时间：2018-03-17 17:32

本文选题：钽材　切入点：冷轧　出处：《材料导报》2016年21期 　论文类型：期刊论文

【摘要】：钽作为一种稀有难熔金属,耐化学腐蚀、电子迁移率低、延展性好、价格昂贵,常用在具有特殊性能要求的苛刻环境中。近些年来,钽材的生产工艺逐步改进,性能不断提高,但生产过程中其晶粒不可避免地会出现择优取向,即织构。织构能明显影响钽材的性能,不同用途的钽制品对织构的要求也不同,深冲时要求有强烈的{111}织构,溅射时需要织构均匀分布。轧制工艺和再结晶退火作为改变晶体材料各向异性的主要手段,前者可影响滑移系的激活和晶粒的转动状态,形成不同的轧制织构,后者能使特定取向的晶粒优先形核并快速长大,形成再结晶织构。国内外对金属材料的织构进行了大量研究,然而主要集中于钢铁和面心立方晶粒材料,对于钽这样的稀贵金属的织构研究较少。主要综述了钽材在轧制和再结晶过程中织构的变化规律,重点介绍了钽材冷轧和再结晶织构演变的研究现状及最新进展。
[Abstract]:Tantalum is a rare refractory metal with low electron mobility, good ductility and high price. Tantalum is widely used in harsh environments with special performance requirements. In recent years, the production process of tantalum has been gradually improved and its properties have been improved. However, in the process of production, the preferred orientation of the grain is inevitable, that is, texture. Texture can obviously affect the properties of tantalum, and the requirements for textures of tantalum products for different uses are also different, and strong {111} texture is required for deep drawing. The rolling process and recrystallization annealing are the main means to change the anisotropy of crystal materials. The former can affect the activation of slip system and the rotation state of grains, forming different rolling textures. The latter can give priority to nucleation and grow rapidly, forming recrystallization texture. A lot of researches have been done on the texture of metallic materials at home and abroad, however, it is mainly focused on iron and steel and face-centered cubic grain materials. There are few studies on textures of rare and valuable metals such as tantalum. The changes of tantalum texture during rolling and recrystallization are reviewed, with emphasis on the present situation and recent development of cold rolling and recrystallization texture evolution of tantalum.
【作者单位】：北方民族大学材料科学与工程学院;
【基金】：宁夏自然科学基金(NZ14112) 北方民族大学省部共建粉体材料与特种陶瓷重点实验室开放项目(1502)
【分类号】：TG146.416;TG339

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