制御圧延-加速冷却鋼におけるNb-B複合添加の効果

• 為広 博

  新日本製鉄(株)君津技術研究部

• 村田 正彦

  新日本製鉄(株)君津技術研究部

• 土生 隆一

  新日本製鉄(株)君津技術研究部 工博

• 南雲 道彦

  新日本製鉄(株)第一技術研究所 理博

書誌事項

タイトル別名

• Effect of Combined Addition of Niobium and Boron on Thermomechanically Processed Steel
• セイギョ アツエン カソク レイキャク コウ ニ オケル Nb B

抄録

In the thermomechanical control process (TMCP) with accelerated cooling, the effect of the combined addition of boron with a grain-refining element, niobium, vanadium or titanium, on the mechanical properties and microstructures of low-carbon steels was studied. It was found that although the single addition of boron has little effect on the steel properties, the combined niobium-boron addition conspicuously improves the strength and toughness balance. In the case of the single addition of boron, coarse Fe₂₃(CB)₆ precipitates at γ-grain boundaries after rolling, and the γ-α transformation suppressing effect by boron is remarkably weakened. Niobium addition to boron steel has the effect of suppressing the precipitation of Fe₂₃(CB)₆ and strongly retards the γ-α transformation, and hence produces a fine-grained bainitic structure. Titanium has the same effect as that of niobium, but vanadium does not. The strengthening and toughening mechanism of steels by the combined niobium-boron addition was also discussed by examining the effect of alloying elements on the recrystallization stop temperature of γ during rolling, γ-α transformation behavior and so on.

収録刊行物

• 鉄と鋼

  鉄と鋼 72 (3), 458-465, 1986

  一般社団法人 日本鉄鋼協会

キーワード

• Materials Chemistry
• Metals and Alloys
• Physical and Theoretical Chemistry
• Condensed Matter Physics

詳細情報

• CRID: 1390282680160718336
• NII論文ID: 110001870570
• NII書誌ID: AN00151251
• DOI: 10.2355/tetsutohagane1955.72.3_458
• ISSN: 18832954
• ISSN: 00211575
• NDL書誌ID: 3070478
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3070478
• Web Site: https://www.jstage.jst.go.jp/article/tetsutohagane1955/72/3/72_3_458/_pdf
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