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| Effect of Nb on Austenite Grain Growth of Low Carbon Steel |
| YU Qingbo1,2,3,ZHANG Zhongbo1,LI Zilin1,WEI Xuan1 |
| 1. Technology Center, Anyang Iron and Steel Group Corp., Anyang 455004, Henan, China; 2. College of Mechanical Engineering, Qiqihar University, Qiqihar 161006, Heilongjiang, China; 3. Postdoctoral Working Station, Harbin Institute of Technology, Harbin 150001, Heilongjiang, China |
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Abstract The effects of heating temperature on austenite grain size of 0.015% Nb steel and Nb free steel were investigated by Gleeble 1500 thermomechanical simulator. When the heating temperatures were 1500, 1200 and 1230 ℃，the austenite grains of Nb steel were finer than those of Nb free steel respectively. But when the heating temperature was 1240 ℃, the austenite grains of Nb steel were larger than those of Nb free steel. It is suggested theoretically that the austenite grain size of Nb steel is increased due to the intraboundary adsorption of Nb atom.
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Received: 01 January 1900
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2006, Vol. 41 
