非调质钢C38N2热变形行为探索及热加工图研究
The ResearchOn Hot Deformation Behavior and Hot Processing Map of C38N2 Steel
1：谭利:2：詹肇麟:3：刘攀:4：魏元生:5：雍岐龙:6：包耀宗
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作者单位：1-3：昆明理工大学，4.长城汽车股份有限公司，5-6：钢铁研究总院
中文关键字：非调质钢；动态再结晶；热加工图
英文关键字：microalloyed forging steels; dynamic recrystallization; processing map
中文摘要： 通过Gleeble3800研究了非调质钢C38N2在变形量为60%、变形温度为950-1150℃、应变速率为0.1-10s-1的热变形行为，通过腐蚀晶粒度得到了动态再结晶晶粒尺寸模型，利用峰值应力数据计算C38N2的变形激活能和热加工图，结果表明，在变形温度为1100-1150℃、变形速率为0.1-0.2 s-1的条件下功率耗散值最大，达32%，可以为确定最佳的热加工工艺参数提供依据。
英文摘要： The high temperature compression tests of microalloyed forging steel C38N2 were carried at Gleeble-3800 simulator at the strain of 60%, the temperature 950-1150℃, and the strain rate of 0.1-1s-1. The deformation activation energy and the hot processing map of C38N2 were obtained based on the peak stress. The austenite grain size of dynamic recrystallization was obtained based on grain grade corrosion. The results show that the highest efficiency of power dissipation which is in the region of 1100-1150℃, 0.1-0.2 s-1 is 32%, which can be used to determine the best parameter of the hot deformation.