| 加热及变形温度对含铌高碳钢奥氏体组织的影响 |
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| 引用本文： | 董洪波,王高潮. 加热及变形温度对含铌高碳钢奥氏体组织的影响[J]. 热加工工艺, 2009, 38(22) |
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| 作者姓名： | 董洪波 王高潮 |
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| 作者单位： | 南昌航空大学材料科学与工程学院,江西,南昌,330063 |
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| 基金项目： | 江西省自然科学基金资助项目 |
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| 摘 要： | 针对铌微合金化高碳钢线材,在Gleeble-1500热模拟实验机上研究不同加热及变形温度下奥氏体组织的变化规律.结果表明.奥氏体粗化温度为1200℃,在1150～1200℃,奥氏体晶粒平均尺寸增大约30 μm;材料1100℃奥氏体化后,以40 s~(-1)、35%变形量进行一道次压下变形,1000℃以上为再结晶区,900℃以下为未再结晶区:在900℃形变淬火,析出物为NbC,尺寸为20～60nm,弥散细小的NbC析出颗粒阻碍了晶粒的长大.
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| 关 键 词： | 铌 高碳钢 温度 奥氏体 |
Effect of Heating and Deformation Temperature on Austenite Structure of Nb Micro-alloyed High Carbon Steel |
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| DONG Hongbo,WANG Gaochao. Effect of Heating and Deformation Temperature on Austenite Structure of Nb Micro-alloyed High Carbon Steel[J]. Hot Working Technology, 2009, 38(22) |
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| Authors: | DONG Hongbo WANG Gaochao |
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| Abstract: | The evolution of austenite microstructure of Nb micro-alloyed high carbon steel wire at different heating and deformation temperature was investigated using Gleeble-1500 simulator machine. The results show that the austenite coarsening temperature is 1200℃, and its average grain size increases by about 30 μm from 1150 ℃ to 1200℃ ; after austenitizing at 1100℃, one pass deformation is carried out with deformation of 35% and strain rate of 40 s~(-1). The reerystallization temperature is above 1000℃, and non-recrystallization temperature is below 900℃. When deforming and quenching at 900℃, the precipitate is NbC carbide with 20～60 nm in diameter. The fine dispersed NbC carbides inhibit grains from coarsening. |
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| Keywords: | Nb high carbon steel temperatttre austenite |
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