高Mnオーステナイト鋼の恒温変態に伴う組織変化

• 小野 嘉則

  九州大学大学院生

• 土山 聡宏

  九州大学大学院生

• 高木 節雄

  九州大学大学院工学研究科

書誌事項

タイトル別名

• Microstructural Change during Isothermal Aging in High Manganese Austenitic Steels
• コウ Mn オーステナイト コウ ノ コウオン ヘンタイ ニ トモナウ ソシキ

抄録

Microstructural change during isothermal aging has been investigated in 13%Mn-0.9%C and 22%Mn-0:6%C steels by means of optical and electron microscopy and X-ray diffractometry.<BR>High manganese austenitic steels undergo three kinds of reactions during isothermal aging ;(1) grain boundary precipitation of carbide, (2)precipitation of platelet carbide within austenite(γ) grains and (3)formation of lamellar structure through eutectoid transformation (γ→ferrite(α)+carbide).In 13%Mn-0.9%C steel, all of the reactions occur and the carbide concerning the reactions is M₃C in any case. On the other hand, in 22%Mn-0.6%C steel, only two of them occur ; grain boundary precipitation of M₂₃C₆ carbide (not M₃C) and the eutectoid transformation (γ→α+M₃C). Besides, both of the two reactions in 22%Mn-0.6%C steel were effectively suppressed due to the chemical composition ; high Mn and low C content.<BR>Eutectoid transformation proceeds by being supplied carbon from untransformedγ, so that this results in the shortage of carbon in untransformedγduring isothermal aging and theγphase undergoesγ→ε(hcp) martensitic transformation on the following cooling.

収録刊行物

• 鉄と鋼

  鉄と鋼 84 (4), 309-314, 1998

  一般社団法人 日本鉄鋼協会

キーワード

• high manganese austenitic steel
• high carbon steel
• isothermal transformation
• carbide
• eutectoid transformation
• microstructure

詳細情報

• CRID: 1390282680161415808
• NII論文ID: 110001481811
• NII書誌ID: AN00151251
• DOI: 10.2355/tetsutohagane1955.84.4_309
• ISSN: 18832954
• ISSN: 00211575
• NDL書誌ID: 4437267
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4437267
• Web Site: https://www.jstage.jst.go.jp/article/tetsutohagane1955/84/4/84_4_309/_pdf
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