采用Gleeble-3500热模拟试验机,对Q460GJE钢进行了单道次热压缩试验,研究了试验钢形变奥氏体动态再结晶行为,并建立了试验钢的再结晶图.结果表明:在较高变形温度和较低应变速率下,试验钢容易发生动态再结晶;当应变速率高于1 s-1时,动态再结晶难以发生.试验钢动态再结晶激活能为438.5 kJ/mol,并确定了动态再结晶临界应变与Z参数之间的关系.研究结果可为Q460GJE钢现场轧制工艺的制定提供依据.
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