발간논문

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Vol.50, No.12, 883 ~ 890, 2012
Title
Effects of Grain Size on Carbon Diffusion in an Ultra-Low Carbon Steel for Hot Press Forming
강수영 Soo Young Kang
Abstract
Carbon diffusion of ultra low carbon steel treated at 880℃ and 930℃ for 10, 30, 60 and 120 minutes was investigated using optical microscopy, SAM, EPMA, and Micro Vickers. The martensite patterns of the specimens treated at 880℃ and 930℃ were different. Martensite in the ferrite region was found in the specimen treated at 880℃ because of grain boundary diffusion. Such phenomena is explained by a carbon diffusion model.
Key Words
HPF (hot press forming), carbon diffusion, ultra Low carbon steel, martensite, carbon diffusion model
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