ITER用高性能轧制W板制备及其组织性能研究

发布时间：2017-12-31 02:30

  本文关键词：ITER用高性能轧制W板制备及其组织性能研究　出处：《粉末冶金技术》2016年05期 　论文类型：期刊论文

  更多相关文章： 轧制钨板 物理力学性能 电子背散射衍射分析 退火过程

【摘要】：以纯度为99.95%的钨粉为原料,在200 MPa压力下冷等静压成形,2 300℃于H2气氛中进行烧结制得钨烧结坯。钨烧结坯在1 250~1 500℃于H2气氛中经过4道次轧制制得接近理论密度的钨板。通过金相、维氏硬度和高温拉伸强度分析了轧制过程和退火过程中钨板组织和性能的变化规律。通过电子背散射衍射(EBSD)分析了退火过程中钨板织构的衍变。结果表明:轧制过程中钨板的密度、维氏硬度和高温抗拉强度随材料变形量的升高而增大,经过4道次轧制钨板的密度可接近理论密度,维氏硬度和高温抗拉强度分别为HV450和540 MPa;轧制态的钨板晶粒组织有明显沿RD方向拉长,1 350℃退火时,形变织构明显减弱,晶粒取向分布趋于随机。通过统计面积分数分析得到1 350℃钨板晶粒再结晶组织比例占65.8%。
[Abstract]:With a purity of 99.95% tungsten powder as raw material, forming under the pressure of 200 MPa cold isostatic pressing, 2300 C in H2 atmosphere sintering sintering tungsten. Tungsten sintered at 1 C in H2 250~1 500 atmosphere after 4 passes was close to the theoretical density of the tungsten plate. By metallographic, Vivtorinox the hardness and tensile strength of tungsten plate microstructure and mechanical properties of rolling process and annealing process. By electron backscatter diffraction (EBSD) analysis of the evolution of the annealing process of tungsten plate texture. The results show that the rolling process of tungsten plate density, Vivtorinox hardness and high temperature tensile strength with the material deformation increases. After 4 rolling tungsten plate density can be close to the theoretical density, Vivtorinox hardness and high temperature tensile strength were HV450 and 540 MPa; tungsten plate grain rolled was elongated along the RD direction, 1350 DEG C during annealing, the texture is greatly reduced The grain orientation distribution tends to be random. By the statistical area fraction analysis, the grain recrystallized structure ratio of tungsten plate at 1350 C is 65.8%.

【作者单位】： 钢铁研究总院安泰科技股份有限公司;
【分类号】：TF125.241;TG339
【正文快照】： 钨具有熔点、强度高,抗热震性好、化学稳定性高等特点被广泛应用于蒸发舟、电子管棚极、隔热屏、高温炉、医疗屏蔽件等领域[1-3]。随着科学技术的不断发展,钨在原子能材料中也有着良好的应用前景,由于对氘和氚的吸附性极小、放射性低等优点,钨在国际热核聚变实验堆项目(ITER项，

本文编号：1357696