Magnetic Analysis of Precipitation and Coarsening of Carbides in Steels.

• Hildebrand Helga

  Institute of Physical Metallurgy, Freiberg University of Mining and Technology

抄録

Dispersion microstructures in C-, Cr- and Mn-alloyed steels result from the precipitation and coarsening of carbide particles from the martensitic initial condition. The changes in the microstructure were observed at aging temperatures T=500, 600, 650 and 700°C and for the time t=1 to 4290 min by measuring the coercive field strength H_C. The particle size analysis on scanning electron micrographs of M₃C in the steels and of M₆C (+MC) carbide particles in the case of the high-alloyed steel X80WMo6.5 yielded to a certain connection with H_C. Thus H_C can be taken as an indirect microstructural characteristic quantity insteed of directly observed microstructure data.<br>It was found that nucleation, growth and the dominating coarsening of the particles take place permanently in so-called generations. With increasing time the particle sizes in the one after another following generations become smaller because of the matrix depletion of the participated elements by precipitation. The Ostwald-ripening law is to apply separately to each generation. All the processes and relationships, which are connected with H_C, can be written mathematically.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 37 (1), 65-73, 1997

  一般社団法人 日本鉄鋼協会

キーワード

• C-, Mn-, Cr-alloyed steels, X80WMo6.5
• M₃C, M₆C/(MC) carbide particles
• martensitic initial condition
• dispersion microstructure
• scanning electron microscopy (SEM)
• coercive field strength
• particle growth
• particle coarsening
• Ostwald-ripening
• particle generations

詳細情報

• CRID: 1390001206452614912
• NII論文ID: 10002454751
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.37.65
• ISSN: 13475460
• ISSN: 09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/37/1/37_1_65/_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