最新色国产精品精品视频,中文字幕日韩一区二区不卡,亚洲有码转帖,夜夜躁日日躁狠狠久久av,中国凸偷窥xxxx自由视频

+高級檢索
Ti—13Al—29Nb—2.5Mo合金ISM熔煉過程中多組元揮發(fā)損失
DOI:
作者:
作者單位:

作者簡介:

通訊作者:

中圖分類號:

TF133

基金項目:

國家973資助項目(G2000067202-2)


Evaporation Loss of the Components in Ti-13Al-29Nb-2.5Mo Melt during ISM Process
Author:
Affiliation:

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問統(tǒng)計
    • |
  • 參考文獻(xiàn)
    • |
  • 相似文獻(xiàn)
    • |
  • 引證文獻(xiàn)
    • |
  • 資源附件
    • |
  • 文章評論
    摘要:

    在基于活度系數(shù)計算模型的基礎(chǔ)上，計算了ISM熔煉過程中不同熔煉溫度下Ti-13Al-29Nb-2.5Mo(ω/%)熔體中Ti,Al,Nb元素的飽和蒸氣壓，計算結(jié)果表明，在熔煉溫度范圍內(nèi)，Al元素的飽和蒸氣壓分別比Ti,Nb元素的飽和蒸氣壓大17倍和3070倍左右。在熔煉溫度范圍內(nèi)對熔體中Al,Ti,Nb元素的揮發(fā)損失速率的計算表明，Al元素在損失速率比Ti,Nb的損失速率分別大43倍和144倍左右，在此基礎(chǔ)上計算了Ti,Al,Nb元素的揮發(fā)損失量以及合金在熔煉后的化學(xué)成分，結(jié)果表明由于合金中各組元的揮發(fā)損失速率大小不一，使得熔煉前后合金的成分出現(xiàn)了變化。分析表明合理降低熔煉溫度及增加真空室中壓力可以減小成分的變化。本結(jié)果為ISM熔煉實踐中合金成分控制提供有價值的理論指導(dǎo)。

    Abstract:

    Based on the activity coefficient calculation module, the saturated pressures of Ti, Al and Nb elements in molten Ti-13Al-29Nb-2.5Mo (mass fraction) at different melting temperatures were calculated. The saturated pressure of element Al in the melting temperature is as big as 17 and 3 070 times of those of Ti and Nb elements respectively. The mass loss rates of Al, Ti, Nb in the melt during the process were also calculated. The mass loss rate of Al is as big as 43 and 144 times of those of Ti, Nb. Based on the evaporation loss rate, the evaporation loss quantity of the elements and the alloy chemical composition after the ISM process was also calculated. Because the mass loss rates of Al, Ti and Nb are different, the ultimate alloy chemical composition deviated from its original composition after the melting process. Analysis shows that properly decreasing the melting temperature and/or increasing the chamber pressure can decrease the composition deviation. This article will give some valuable guidance to the alloy composition controlling during ISM process.

    參考文獻(xiàn)
    相似文獻(xiàn)
    引證文獻(xiàn)
引用本文

劉貴仲 蘇彥慶 等. Ti—13Al—29Nb—2.5Mo合金ISM熔煉過程中多組元揮發(fā)損失[J].稀有金屬材料與工程,2003,(2):108~112.[Liu Guizhong, Su Yanqing, Guo Jingjie, Ding Hongsheng, Jia Jun, Fu Hengzhi. Evaporation Loss of the Components in Ti-13Al-29Nb-2.5Mo Melt during ISM Process[J]. Rare Metal Materials and Engineering,2003,(2):108~112.]
DOI：[doi]

復(fù)制
文章指標(biāo)
  • 點擊次數(shù):
  • 下載次數(shù):
  • HTML閱讀次數(shù):
  • 引用次數(shù):
歷史
  • 收稿日期:
  • 最后修改日期:2001-06-18
  • 錄用日期:
  • 在線發(fā)布日期:
  • 出版日期: