+Advanced Search
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

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    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.

    Reference
    Related
    Cited by
Get Citation

[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

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:May 27,2022
  • Revised:July 20,2022
  • Adopted:August 11,2022
  • Online: July 07,2023
  • Published: June 30,2023