脱炭した球状黒鉛鋳鉄の冷却中における組織変化

• 大和田野 利郎

  九州工業大学

• 岸武 勝彦

  大阪産業大学大学院工学研究科

• 二宮 涼一

  九州工業大学大学院工学研究科

書誌事項

タイトル別名

• Microstructure Change of Decarburized Spheroidal Graphite Cast Iron during Cooling
• ダッタンシタ キュウジョウ コクエン チュウテツ ノ レイキャクチュウ ニ オケル ソシキ ヘンカ

抄録

  Microstructure of decarburized spheroidal graphite cast iron is affected by the temperature and time of decarburization, as well as by cooling rate thereafter. To make clear these decarburizing conditions, experiments and numerical simulation were carried out. The isothermal growth rate of decarburized layer obtained experimentally is in good coincidence with that calculated formerly. Precipitations of ferrite and carbon take place beside decarburization during cooling. On further cooling below eutectoid temperature, ferritization proceeds in hyper-eutectoid zone of decarburized layer as well as non-decarburized part, while ferrite-pearlite mixed structure is formed in hypo-eutectoid zone. The latter striking structure interposed by ferritic matrix zones is called “pearlite band”. Numerical simulation shows that pearlite band is likely to be formed when the product of the initial decarburized depth by the square root of cooling rate is larger than about 0.01cm・(K/s)^1/2 for cooling from 1273K, and 0.006cm・(K/s)^1/2 for cooling from 1173K.

収録刊行物

• 鋳造工学

  鋳造工学 79 (3), 127-132, 2007

  公益社団法人 日本鋳造工学会

キーワード

• spheroidal graphite cast iron
• decarburizing
• microstructure
• cooling rate
• numerical simulation
• pearlite band
• ferritization

詳細情報

• CRID: 1390001206508562944
• NII論文ID: 10018851394
• NII書誌ID: AN10514770
• DOI: 10.11279/jfes.79.127
• COI: 1:CAS:528:DC%2BD2sXktFOktbw%3D
• ISSN: 21855374
• ISSN: 13420429
• NDL書誌ID: 8738031
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8738031
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可