Dynamic Transformation of Austenite to Ferrite During the Torsion Simulation of Strip Rolling
Torsion simulations of strip rolling were carried out on a 0.06%C-0.3%Mn-0.01%Si steel over the temperature range 930℃ to 1000℃.Pass strains of 0.4 were applied at a strain rate of 1s?1.Interpass times of 0.5s,1s,1.5s and 3s were employed to determine the mean flow stresses(MFS”s)applicable to strip rolling.By means of double differentiation,critical strains of 0.04 and 0.11 were established for the initiation of dynamic transformation and dynamic recrystallization,respectively.It is shown that the dynamic transformation of austenite to ferrite takes place above the Ae3 temperature,resulting in significantly lower than expected MFS values.The nucleation of ferrite reduces the rolling load and modifies the microstructure.Shorter interpass times produce larger decreases in MFS than longer ones because of reduced recovery during short interpass intervals.
Strip mill simulation interpass time dynamic transformation
John J. Jonas Clodualdo Aranas
Materials Engineering,McGill University 3610 University St. Montreal,Canada H3A 0C5
国内会议
上海
英文
1-7
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）