本文關(guān)鍵詞：ITER用高性能軋制W板制備及其組織性能研究　出處：《粉末冶金技術(shù)》2016年05期 　論文類型：期刊論文

  更多相關(guān)文章： 軋制鎢板 物理力學(xué)性能 電子背散射衍射分析 退火過程

【摘要】：以純度為99.95%的鎢粉為原料,在200 MPa壓力下冷等靜壓成形,2 300℃于H2氣氛中進行燒結(jié)制得鎢燒結(jié)坯。鎢燒結(jié)坯在1 250~1 500℃于H2氣氛中經(jīng)過4道次軋制制得接近理論密度的鎢板。通過金相、維氏硬度和高溫拉伸強度分析了軋制過程和退火過程中鎢板組織和性能的變化規(guī)律。通過電子背散射衍射(EBSD)分析了退火過程中鎢板織構(gòu)的衍變。結(jié)果表明:軋制過程中鎢板的密度、維氏硬度和高溫抗拉強度隨材料變形量的升高而增大,經(jīng)過4道次軋制鎢板的密度可接近理論密度,維氏硬度和高溫抗拉強度分別為HV450和540 MPa;軋制態(tài)的鎢板晶粒組織有明顯沿RD方向拉長,1 350℃退火時,形變織構(gòu)明顯減弱,晶粒取向分布趨于隨機。通過統(tǒng)計面積分數(shù)分析得到1 350℃鎢板晶粒再結(jié)晶組織比例占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%.

【作者單位】： 鋼鐵研究總院安泰科技股份有限公司;
【分類號】：TF125.241;TG339
【正文快照】： 鎢具有熔點、強度高,抗熱震性好、化學(xué)穩(wěn)定性高等特點被廣泛應(yīng)用于蒸發(fā)舟、電子管棚極、隔熱屏、高溫爐、醫(yī)療屏蔽件等領(lǐng)域[1-3]。隨著科學(xué)技術(shù)的不斷發(fā)展,鎢在原子能材料中也有著良好的應(yīng)用前景,由于對氘和氚的吸附性極小、放射性低等優(yōu)點,鎢在國際熱核聚變實驗堆項目(ITER項，

本文編號：1357696