Microstructure and Growth Kinetics of Nitrided Zone in Plasma-nitrided Fe-Cr Alloys

• Miyamoto Goro

  Institute for Materials Research, Tohoku University

• Yonemoto Atsushi

  Graduate Student, Kyoto University

• Tanaka Yusuke

  Graduate Student, Kyoto University

• Maki Tadashi

  Emeritus Professor, Kyoto University

• Furuhara Tadashi

  Institute for Materials Research, Tohoku University

抄録

Microstructure and growth kinetics of the nitrided zone have been examined in various Fe–Cr binary alloys ranging from 1 to 30 mass% Cr that had been plasma-nitrided at temperatures between 743 and 943 K. CrN precipitates form under all the nitriding conditions. With increasing Cr content or decreasing nitriding temperature, the morphology of CrN precipitates changes drastically from continuous precipitation with a fine disk-shaped morphology to CrN lamellar precipitation. In addition, small amounts of Cr₂N form when the Cr content and the nitriding temperature are high. In spite of the different manners of Cr–nitride precipitation, the thickness of the nitrided zone is approximately proportional to the square root of the nitriding period. Furthermore, in most of the alloys the activation energies for the overall growth kinetics of the nitrided zone are nearly constant.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 47 (10), 1491-1496, 2007

  一般社団法人 日本鉄鋼協会

キーワード

• nitriding
• precipitation
• TEM
• kinetics
• steel

詳細情報

• CRID: 1390282681464555648
• NII論文ID: 10027025509
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.47.1491
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational/47/10/47_10_1491/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可