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Effects of Mn Content on the Warm Stretch-Flangeabiliy of C-Si-Mn TRIP-Aided Steels

机译:Mn含量对C-Si-Mn跳闸钢暖拉法的影响

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Effects of Mn content on warm stretch-flangeability are investigated using 0.2% C-1.5% Si(1.5-5.0)% Mn transformation-induced plasticity (TRIP)-aided sheet steels with annealed martensite matrix. Warm hole-expansion at 150- 250 degrees C after hole-punching at 25 degrees C enhances the stretch-flangeability of 3 and 5% Mn steels. The warm stretchflangeability increases with the Mn content. The superior warm stretch-flangeability of hole-punched 5% Mn steel is caused by its large localized ductility on expanding, which results primarily from the stabilization of its large quantity of retained austenite and its fine microstructure. Use of hole-drilling instead of hole-punching at 25 degrees C further increases the stretch-flangeability and raises the optimum expanding temperature to 250-300 degrees C.
机译:使用0.2%C-1.5%Si(1.5-5.0)%Mn转化诱导的塑性(TRIP) - 退火马氏体基质,研究了Mn含量对温度凸缘性的影响。 在25摄氏度的空穴冲击后150-250℃下的温热孔膨胀增强了3和5%MN钢的拉伸凸缘性。 温度恒定的伸展性随Mn含量增加。 空洞的5%Mn钢的卓越温暖的拉伸凸缘性是由其大的局部延展性引起的,这主要从其大量保留的奥氏体及其微观结构的稳定性产生。 在25℃下使用空穴钻孔代替空穴冲孔进一步增加了拉伸凸缘性,并将最佳的膨胀温度提高至250-300℃。

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