One-step Q&P処理を施した中炭素鋼の組織発達および機械的性質に及ぼす初期オーステナイト粒径の影響
書誌事項
- タイトル別名
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- Effect of Initial Austenite Grain Size on Microstructure Development and Mechanical Properties in a Medium-carbon Steel Treated with One-step Quenching and Partitioning
- One-step Q&P ショリ オ ホドコシタ チュウ タンソコウ ノ ソシキ ハッタツ オヨビ キカイテキ セイシツ ニ オヨボス ショキ オーステナイト リュウケイ ノ エイキョウ
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説明
<p>Fe-0.4C-1.2Si-0.8Mn (mass%) alloys austenitized at different temperatures, ranging from 1103 to 1473 K, were subjected to interrupted quenching (IQ) at 473 K and then maintained at that temperature to induce the partitioning of carbon from martensite to austenite (one-step quenching and partitioning (Q&P) process). The initial austenite grain size before the IQ was varied from 20 to 573 μm. As the initial austenite grain size becomes finer, the enrichment of carbon in the untransformed austenite during the partitioning treatment is enhanced, which leads to a greater increase in the volume fraction of retained austenite. The reasons for the increased carbon enrichment were explained by the effective carbon partitioning as well as the promoted bainitic transformation, which were both caused by the increase in the area of the martensite/austenite interface. Tensile tests of the specimens with different initial austenite grain sizes revealed that the mechanical properties of the one-step Q&P specimens improved in both strength and elongation by the refinement of the initial austenite grains.</p>
収録刊行物
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- 鉄と鋼
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鉄と鋼 109 (4), 344-353, 2023
一般社団法人 日本鉄鋼協会
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詳細情報 詳細情報について
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- CRID
- 1390295603316133632
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- NII論文ID
- 130007987406
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- NII書誌ID
- AN00151251
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- ISSN
- 18832954
- 13475460
- 00211575
- 09151559
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- NDL書誌ID
- 032796262
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- 本文言語コード
- ja
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- 資料種別
- journal article
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- JaLC
- NDLサーチ
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