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비도금 핫스탬핑용 보론강판의 분위기 산소량에 따른 산화층 분석
이지호(J. H. Lee),최태훈(T. H. Choi),송정한(J. H. Song),배기현(G. H. Bae) 한국소성·가공학회 2023 소성가공 : 한국소성가공학회지 Vol.32 No.3
As the supply of eco-friendly vehicles increases, the application rate of hot stamping components is rising to reduce vehicle weight and improve safety. Although Al-Si coated steel sheets are commonly used in hot stamping processes, their manufacturing costs are elevated due to process patents and royalties. Various hot stamping studies have been conducted to reduce these production costs. In this study, we derived a process control method for suppressing the oxide layer of hot stamping parts using uncoated boron steel sheets. Firstly, hatshaped parts were hot stamped under atmospheric conditions to analyze the tendency of oxide layer formation by location. Then, the Gleeble system was used to observe oxide layer formation based on oxygen content under various atmospheric conditions. Finally, the oxide layer thickness was quantitatively measured using SEM images.