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通过单道次压缩实验,研究了孪生诱导塑性钢,即TWIP钢在800~1000℃、应变速率.ε=0.01~5.00 s-1条件下的热变形行为及其组织变化。结果表明,TWIP钢的热变形激活能Q=489.972 kJ/mol,在此基础上得到了TWIP钢高温变形的热加工方程;采用Z参数预测了动态再结晶的临界条件,得知:Z≤6.76×1020时,易发生动态再结晶,此时TWIP钢具有较好的热加工性能。
The single-pass compression experiments were carried out to study the hot deformation behavior and microstructure of TWIP steel under the condition of 800 ~ 1000 ℃, strain rate ε = 0.01 ~ 5.00 s-1. The results show that the thermal deformation activation energy of TWIP steel is Q = 489.972 kJ / mol, on the basis of which, the hot working equation of high temperature deformation of TWIP steel is obtained. The critical parameters of dynamic recrystallization are predicted by Z parameter. It is found that Z≤6.76 × 1020, prone to dynamic recrystallization, this time TWIP steel has better thermal processing performance.