低炭素ベイナイト鋼の再現HAZにおける組織,靭性に及ぼすボロンの影響

• 畑野 等

  (株)神戸製鋼所材料研究所

書誌事項

タイトル別名

• Effect of Boron on Microstructure and Toughness of Simulated HAZ of Low Carbon Bainitic Steel
• 低炭素ベイナイト鋼の再現HAZにおける組織,靱性に及ぼすボロンの影響
• テイタンソ ベイナイト コウ ノ サイゲン HAZ ニ オケル ソシキ ジンセイ ニ オヨボス ボロン ノ エイキョウ

抄録

Effect of boron on microstructure and toughness of simulated HAZ in 0.03%C-2%Mn-0.6%Cr-0.2%Mo-0.02%Nb bainitic steel was investigated. It was found that morphology of bainitic ferrite of simulated HAZ is changed from granular into lath like morphology, and that toughness is deteriorated by increasing boron. It is thought that the change in bainitic ferrite morphology deteriorates toughness, considering that facet of Charpy impact surface is coarsened with increasing boron. It has also been clarified that bainitic transformation is retarded by increasing boron. The change of bainitic ferrite morphology and the depression of bainitic transformation by increasing boron could be explained by the decrease in γ grain boundary energy due to free boron segregation to γ grain boundary.

収録刊行物

• 鉄と鋼

  鉄と鋼 89 (3), 362-368, 2003

  一般社団法人 日本鉄鋼協会

キーワード

• low carbon bainitic ferrite
• heat affected zone (HAZ)
• free boron
• toughness
• microstructure

詳細情報

• CRID: 1390001205184220928
• NII論文ID: 110001457566
• NII書誌ID: AN00151251
• DOI: 10.2355/tetsutohagane1955.89.3_362
• ISSN: 18832954
• ISSN: 00211575
• NDL書誌ID: 6477224
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6477224
• Web Site: https://www.jstage.jst.go.jp/article/tetsutohagane1955/89/3/89_3_362/_pdf
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