5h持久應(yīng)力不小于100 MPa的要求。"/>

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
超超臨界機(jī)組轉(zhuǎn)子鋼FB2持久性能和組織演變研究
作者:
作者單位:

北京科技大學(xué)

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)51771016)


An Investigation on Stress Rupture Property and Microstructure Evolution for FB2 Rotor Steel Used in Ultra-Supercritical Units
Author:
Affiliation:

University of Science and Technology Beijing

Fund Project:

  • 摘要
    • |
  • 圖/表
    • |
  • 訪問(wèn)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FB2轉(zhuǎn)子鋼為研究對(duì)象,通過(guò)高溫持久試驗(yàn)、金相顯微鏡、掃描電鏡及透射電鏡等研究手段,研究了FB2轉(zhuǎn)子鋼在高溫630℃作用下的持久性能及組織演變規(guī)律,結(jié)果表明：FB2轉(zhuǎn)子鋼為回火馬氏體組織,原奧氏體晶界與晶內(nèi)均析出了大量細(xì)小M23C6相。持久應(yīng)力作用下,隨著時(shí)間延長(zhǎng),馬氏體板條發(fā)生分解逐漸變寬,位錯(cuò)密度下降,M23C6相在原奧氏體晶界和馬氏體板條邊界上逐漸長(zhǎng)大,Laves相逐漸在原奧氏體晶界上析出長(zhǎng)大,并聚集成鏈狀分布。微觀組織結(jié)構(gòu)的變化會(huì)顯著影響高溫持久性能,但FB2轉(zhuǎn)子鋼最長(zhǎng)斷裂點(diǎn)能滿足630℃、105h持久應(yīng)力不小于100 MPa的要求。

    Abstract:

    In present work the stress rupture property and related microstructure evolution of FB2 rotor steel are investigated by metallographic analysis, scanning electron microscope and transmission electron microscope. The investigation shows that the microstructure of FB2 rotor steel is composed of tempered martensite. Large amount of fine M23C6 carbides precipitates on original austenite grain boundary and in matrix. Decomposition and broaden of martensite lath can be found with prolonging stress rupture duration. The dislocation density decreases at the same time. Meanwhile, the M23C6 carbides located at grain boundary and martensite lath boundary grows. Laves phase gradually grows at original austenite grain boundary and aggregates into a chain distribution. The microstructure evolution at high temperature can apparently influence high temperature stress rupture property. While the FB2 roto steel can still meet the requirement that the stress is higher than 100 MPa after 630℃stress rupture test for 105h.

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

姚漢新,江河,姚志浩,董建新.超超臨界機(jī)組轉(zhuǎn)子鋼FB2持久性能和組織演變研究[J].稀有金屬材料與工程,2023,52(6):2309~2316.[yaohanxin, jianghe, yaozhihao, dongjianxin. An Investigation on Stress Rupture Property and Microstructure Evolution for FB2 Rotor Steel Used in Ultra-Supercritical Units[J]. Rare Metal Materials and Engineering,2023,52(6):2309~2316.]
DOI：10.12442/j. issn.1002-185X.20220465

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:2022-05-27
  • 最后修改日期:2022-07-20
  • 錄用日期:2022-08-11
  • 在線發(fā)布日期: 2023-07-07
  • 出版日期: 2023-06-30