Phase and morphology of carbides in ASTM F75 Co-Cr-Mo-C alloys formed at 1473 to 1623 K

Shingo Mineta, Alfirano, Shigenobu Namba, Takashi Yoneda, Kyosuke Ueda, Takayuki Narushima

研究成果: Conference contribution

9 被引用数 (Scopus)

抄録

The phase and morphology of precipitates in heat-treated Co-28Cr-6Mo-xC (x = 0.12, 0.15, 0.25, and 0.35mass%) alloys were investigated. The as-cast alloys were solution-treated in the temperature range of 1473 to 1623 K for 0 to 43.2 ks. Complete precipitate dissolution was observed in all four alloys, each of which had different carbon contents. The holding time for complete dissolution was greater for alloys with greater carbon content. The curve representing the boundary between the complete- and incomplete-dissolution conditions for each alloy is C shaped. Under the incomplete precipitate dissolution conditions of the Co-28Cr-6Mo-0.25C alloy, an M23C6 type carbide and a π-phase (M2T3X type carbide with β-Mn structure) were observed at 1548 to 1623 K, and starlike precipitates with a stripe pattern and with a dense appearance were both observed; the former comprised the M 23C6 type carbide + γ-phase, and the latter was the π-phase. In contrast, only a blocky-dense M23C6 type carbide was observed at 1473 to 1523 K.

本文言語English
ホスト出版物のタイトルPRICM7
出版社Trans Tech Publications Ltd
ページ2176-2179
ページ数4
ISBN(印刷版)0878492550, 9780878492558
DOI
出版ステータスPublished - 2010
イベント7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7 - Cairns, QLD, Australia
継続期間: 2010 8月 22010 8月 6

出版物シリーズ

名前Materials Science Forum
654-656
ISSN(印刷版)0255-5476
ISSN(電子版)1662-9752

Other

Other7th Pacific Rim International Conference on Advanced Materials and Processing, PRICM-7
国/地域Australia
CityCairns, QLD
Period10/8/210/8/6

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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