발간논문

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Vol.31, No.1, 64 ~ 73, 1993
Title
Effect of Cooling Rate and Strain Rate on Hot Ductility in Boron Steel
정인상In Sang Chung, 조삼규Sam Gyu Cho
Abstract
In order to investigate the mechanism of embrittlement and to improve hot ductility in boron steel, effect of cooling rate and strain rate on the hot ductility were investigated at temperature range from 650℃ to 850℃. Hot ductility was improved with the slow cooling rate, which is due to the low occupation ratio of precipitates on the grain boundary. And hot ductility was improved with the increased strain rate. This is because hot deformation has been transfered from grain boundary sliding to grain deformation, and precipitates on the grain boundary do not contributed to the initiation of void.
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