FLOW STRESS OF STEEL 55SiMnVB AT HIGH TEMPERATURES AND HIGH STRAIN RATES

Abstract

Abstract: Based on the analyses of hot-deformation mechanism of the steel,a new constitutive equation describing the flow stress of steels was derived.The flow stress data of steel 55SiMnVB have been determined at 900—1200℃,strain rates of 1—100s~(-1)and true-strain of 0.08—0.8.An available evaluated formula on the flows tress has been obtained by means of non-linear regression.It can express clearly the physical process of hot-deformation.

Key words: flow stress, steel 55SiMnVB prediction model, hot-deformation

ZHAO Jiarong YANG Jie Wuhan Iron and Steel University,Wuhan,China ZHAO Jiarong,associate professor,Faculty of Rolling,Wuhan Iron and Steel University,Wuhan 430081,China. FLOW STRESS OF STEEL 55SiMnVB AT HIGH TEMPERATURES AND HIGH STRAIN RATES[J]. Acta Metallurgica Sinica (English Letters), 1990, 3(8): 110-114.

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FLOW STRESS OF STEEL 55SiMnVB AT HIGH TEMPERATURES AND HIGH STRAIN RATES

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