Development of 12 % CrNb Steel for Heavy Duty Gas Turbine Discs.

• Shiga Masao

  Hitachi Research Laboratory, Hitachi, Ltd.

• Hidaka Kishio

  Hitachi Research Laboratory, Hitachi, Ltd.

• Nakamura Shigeyoshi

  Hitachi Research Laboratory, Hitachi, Ltd.

• Fukui Yutaka

  Hitachi Research Laboratory, Hitachi, Ltd.

抄録

Effect of adding elements on creep rupture strength and toughness for heat resistant 12%Cr steel of 1300°C class gas turbine disc was investigated. Creep rupture strength was increased by addition of Mo, W, V, Nb, and N. It was found that the addition of Nb causes a significant increase of creep rupture strength due to fine dispersion of NbC and of ductility due to grain refining. Chemical composition of 12Cr-2.5Ni-2Mo-0.2V-0.08Nb-N steel is determined for gas turbine disc application. Preparation of real scale disc was carried out by electro-slag remelting process in order to avoid the segregation of adding elements in ingot. It is resulted that the mechanical properties of real scale disc specimen show the equivalent properties of small specimens. The steel discs for gas turbine were manufactured from the new steel.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 35 (11), 1400-1406, 1995

  一般社団法人 日本鉄鋼協会

キーワード

• 12%Cr steel
• gas turbine disc
• steel disc
• disc material
• creep rupture strength
• toughness
• aging embrittlement
• Nb addition

詳細情報

• CRID: 1390001206451786752
• NII論文ID: 10015615762
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.35.1400
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/35/11/35_11_1400/_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