低碳钢低的再结晶温度使得其在钢筋的连续轧制过程中可以通过再结晶控制轧制及控制冷却工艺来实现晶粒细化.试验结果表明,成分为0.18C-0.22Si-0.60Mn的低碳碳素钢在850 ℃或更低温度以较大的变形量变形时,可以获得10~20 μm的奥氏体晶粒尺寸;当加以20 ℃/s或更高的冷却速度冷却时,可以得到4~6 μm或更细小的铁素体晶粒尺寸.晶粒细化使得钢筋的力学性能明显提高.
参考文献
[1] | Yangzeng Zheng.Achieving Grain Refinement Through Recrystallization Controlled Rolling and Controlled Cooling in V-Ti-N Microalloyed Steels[J].HSLA Steels Technology and Applications 1983 Pennsylvania USA ASM:85-94. |
[2] | L J.The Effect of Microalloy Concentration on the Recrystallization of Austenite During Hot Deformation[C].Thermomechanical Processing of Microalloyed Austenite,TMS of AIME,Pennsylvania,USA,1981:129-140. |
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