6C型碳化物析出。隨著Al含量提高至6.20%,合金中α-W相和初生M6C型碳化物的面積分?jǐn)?shù)由0.08%提高至2.1%,同時(shí)γ/γ′共晶的面積分?jǐn)?shù)由12.6%提高至21.8%。Al含量的提高對(duì)合金晶粒、枝晶、MC型碳化物以及γ′相的尺寸和形貌影響不大。硬脆的初生M6C型碳化物的大量析出以及固溶強(qiáng)化元素W的消耗是其持久性能降低的主要原因。同時(shí),對(duì)不同Al含量K416合金的持久斷裂機(jī)制也進(jìn)行了討論。"/>

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(jí)檢索
Al含量對(duì)一種高W鑄造高溫合金組織與持久性能的影響
作者:
作者單位:

北京鋼研高納科技股份有限公司

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:


Influence of Al Content on the Microstructure and Stress rupture Property of Cast Superalloy with High W Content
Author:
Affiliation:

1.Gaona Aero Material Co.,Ltd.,100081;2.Beijing,China

Fund Project:

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

    以不同Al含量的高W鑄造高溫合金K416為研究對(duì)象,對(duì)不同Al含量合金在975℃/240MPa條件下的持久性能和室溫基體顯微硬度進(jìn)行了測(cè)試。結(jié)果表明：隨著Al含量的提高,合金的持久壽命和顯微硬度均呈下降趨勢(shì),Al含量中限和高限合金在975℃/240MPa條件下的持久壽命低于技術(shù)條件規(guī)定值。進(jìn)一步的組織表征結(jié)果表明：當(dāng)Al含量為5.60%(質(zhì)量分?jǐn)?shù),下同)時(shí),合金中僅有極少量α-W相和初生M6C型碳化物析出。隨著Al含量提高至6.20%,合金中α-W相和初生M6C型碳化物的面積分?jǐn)?shù)由0.08%提高至2.1%,同時(shí)γ/γ′共晶的面積分?jǐn)?shù)由12.6%提高至21.8%。Al含量的提高對(duì)合金晶粒、枝晶、MC型碳化物以及γ′相的尺寸和形貌影響不大。硬脆的初生M6C型碳化物的大量析出以及固溶強(qiáng)化元素W的消耗是其持久性能降低的主要原因。同時(shí),對(duì)不同Al含量K416合金的持久斷裂機(jī)制也進(jìn)行了討論。

    Abstract:

    Stress rupture tests at 975℃/240MPa and microhardness measurements at room temperature were conducted in high W cast superalloy K416 with various Al contents. The results showed that the stress rupture life and microhardness decreased gradually with increasing the content of Al, the stress rupture life of specimens with medium and high levels of Al content were lower than the values in standard. Microstructural characterization indicated that little M6C carbides and α-W phase were oberved when the Al content was 5.60% (mass fraction, the same below). The area fraction of M6C carbides and α-W phase increased from 0.08% to 2.1% with increasing the Al content to 6.20%. Meanwhile, the area fraction of γ/γ′ eutectics increased from 12.6% to 21.8%. The increase of Al content showed little effect on the sizes and morphologies of grains, dendrites, MC carbides and γ′ phase. The precipitation of brittle M6C carbides with high amounts and the depletion of solid solution strengthening element (W) were responsible for the diminished stress rupture property. In addition, the stress rupture mechanisms of K416 alloy with various Al contents were also discussed.

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

吳劍濤,袁曉飛,宋圣玉,陳興福,李維. Al含量對(duì)一種高W鑄造高溫合金組織與持久性能的影響[J].稀有金屬材料與工程,2021,50(4):1342~1349.[Wu Jiantao, Yuan Xiaofei, Song Shengyu, Chen Xingfu, Li Wei. Influence of Al Content on the Microstructure and Stress rupture Property of Cast Superalloy with High W Content[J]. Rare Metal Materials and Engineering,2021,50(4):1342~1349.]
DOI：10.12442/j. issn.1002-185X.20200401

復(fù)制
文章指標(biāo)
  • 點(diǎn)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:2020-06-09
  • 最后修改日期:2020-06-18
  • 錄用日期:2020-07-01
  • 在線發(fā)布日期: 2021-05-08
  • 出版日期: