Effect of Neodymium Content on Creep Properties of 9Cr-3Co-3W-Nd-B Steel

DOI DOI Web Site Web Site 8 References Open Access
  • Hamaguchi Tomoaki
    Research & Development, Nippon Steel Corporation
  • Mitsuhara Masatoshi
    Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University
  • Kusuhara Hideto
    Interdisciplinary Graduate School of Engineering Sciences, Faculty of Engineering Sciences, Kyushu University

Bibliographic Information

Other Title
  • 9Cr-3Co-3W-Nd-B鋼のクリープ特性に及ぼすネオジム含有量の影響

Description

<p>The effects of the neodymium content on the creep properties and metallographic structure of 9Cr-3Co-3W-Nd-B steel were investigated. Neodymium had a mild effect on the creep rupture strength at contents up to 0.056 mass%. This suggested that the effects of neodymium compounds and solid-dissolved neodymium were minimal in the microstructures and uniformly creep-deformed parts after normalizing and tempering heat treatment. On the other hand, the reduction of area after creep rupture was improved by the addition of neodymium. Creep rupture occurred at the prior austenite grain boundaries on steel without neodymium. Therefore, neodymium conclusively adhered to the segregated sulfur at the prior austenite grain boundaries to suppress the formation of creep cracks.</p>

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 108 (5), 325-333, 2022

    The Iron and Steel Institute of Japan

References(8)*help

See more

Keywords

Report a problem

Back to top