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논문 기본 정보

자료유형
학술저널
저자정보
성상규 (한국재료연구원) 강현준 (영풍 석포제련소) 이영선 (한국재료연구원) 이상용 (국립안동대학교) 이의종 (두산에너빌리티) 제환일 (두산에너빌리티) 신정호 (세아창원특수강) 윤은유 (한국재료연구원)
저널정보
한국소성·가공학회 소성·가공 소성가공 제32권 제5호(통권 제207호)
발행연도
2023.10
수록면
239 - 246 (8page)

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초록· 키워드

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To reduce the forming load due to the temperature drop, during the hot forging process, a reheating hot forging process design is required that to repeat heating and forging. However, if the critical strain required for recrystallization is not induced during forging and grain growth becomes dominant due to the reduction in dislocation density due to repeated heating, the mechanical properties may deteriorate. Therefore, in this study, Inconel 706 alloy was applied, and the grain refinement behavior was comparatively analyzed according to the number of reheating times and effective strain during reheating hot forging process. Reheating was carried out with a total compression rate of 40% up to 4 times. The Inconel 706 compression test specimens heated once showed finer grains as the effective strain increased due to the dynamic recrystallization phenomenon. However, as the number of heating increases, grain refinement was observed even in a low effective strain distribution of 0.43 due to static recrystallization during reheating. Moreover, grain growth occurs at a relatively low effective strain of 0.43 when the number of reheating is four or more. Therefore, it was effective to apply an effective strain of 0.43 or more during hot forging to Inconel 706 in order to induce crystallization through grain refinement and improve the properties of forged products. In addition, we could notice that up to three reheating times condition was appropriate to prevent grain growth and maintain fine grain size.

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Abstract
1. 서론
2. 실험방법
3. 실험결과 및 고찰
4. 결론
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