Proceedings of the Korean Society of Machine Tool Engineers Conference (한국공작기계학회:학술대회논문집)
- 1999.10a
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- Pages.190-196
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- 1999
A Study on the boronizing treatment of hot forgeability of STD61 steel by the paste method
열간단조용 STD 61강의 Boronizing 처리에 의한 표면 물성 변화
Abstract
Hot forgeability of STD 61 steel was boronzed in boronizing paste mainly consisted of B4C and Na2B4O7 at various temperatures and times. Microhardness and thickness of boride layers were measured and distributions of B, Si, Cr and V on the cross section of specimen were observed by EPMA line analysis. Microscopic examination and results of EPMA showed that the boride layer consisted of two layers outer layer of FeB and inner layer of Fe2B. Microhardness of these boride layers was in the range of Hv 1800~2300. Thickness of boride layer increased with times and temperatures. Si-rich
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