X80管线钢奥氏体动态再结晶规律研究.pdfVIP

X80 管线钢奥氏体动态再结晶规律研究 刘红艳 孙洪利 管连生 范 佳 左丽峰 (河北钢铁集团邯钢公司，邯郸 056015) 1 摘 要 利用Gleeble 3500 热模拟实验机对邯钢2250 热轧厂生产的X80 高级别管线钢进行单道次压缩变形实验， 研究其热变形过程中的动态再结晶行为。在 1050~1100℃，应变速率在0.1s-1 的条件下，发生了较明显的动态再结 -1 晶，应变速率为10s 时主要发生了动态回复。现场生产中在980℃以上时，也就是在该成分钢种的再结晶截止温度 以上进行，通过轧制道次之间的再结晶充分细化奥氏体晶粒，低温阶段轧制在950℃以下进行使奥氏体晶粒充分变 形而不发生再结晶，为随后冷却过程中的相变提供更多的形核位置，而有意避开950~980℃之间的温区不进行轧制 以防止发生部分再结晶导致混晶。 关键词 X80 管线钢 Gleeble 3500 动态再结晶 The Research of X80 Pipeline Steel Austenite Dynamic Recrystallization Rule Liu Hongyan Sun Hongli Guan Liansheng Fan Jia Zuo Lifeng (Hebei Steel and Iron Group Handan Iron and Steel Group Co., Ltd. Corporation, Handan，056015) Abstract Carries on the single channel second rolling using the Gleeble 3500 thermal simulation testing aircrafts to the Handan Iron and Steel Group Co., Ltd. 2250 hot rolling factory productions X80 high rank pipeline steel to shrink the distortion experiment, studies in its thermal deformation process the dynamic recrystallization behavior. In 1050~1100 ℃, the strain speed when the 0.1s-1 condition, had the obvious dynamic recrystallization, the strain speed was 10s-1 mainly has had the dynamic reply. In scene production when 980 ℃ above, is also carries on above this ingredient aluminum recrystallization closure temperature, through run passs between recrystallization full refinement austenite crystal grain, the low temperature stage rolling in 950℃ below carries on causes the austenite crystal grain full distortion not to have the recrystallization, to the undercooling change provides afterward the more shape nuclear positions, but intends to avoid 950~980℃ between warm area