An investigation on the effect of carbon and silicon on flow behavior of steel
An investigation on the effect of carbon and silicon on flow behavior of steel
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DOI：
10.1016/s0261-3069(01)00080-2
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发表时间：
2002-05
影响因子：
8.4
通讯作者：
S. Serajzadeh;A. Taheri
中科院分区：
文献类型：
--
作者：
S. Serajzadeh;A. Taheri
研究了碳、硅对钢动态再结晶发生及流变应力的影响。为此，对低碳、中碳和高硅低碳钢三个等级的钢进行了试验。在900-1200°C的温度和0.01-2 s-1的应变速率下进行单次撞击实验以确定相变动力学。利用不同的热处理时间，研究了初始奥氏体晶粒尺寸对钢的动态再结晶动力学和流变行为的影响。结果表明，碳含量的增加使合金在高温和低应变速率下的动态再结晶速率增大，而硅含量的增加使合金的动态再结晶发生时间推迟。此外，增加初始奥氏体晶粒尺寸推迟了动态再结晶的开始，并导致在等效变形条件下更高的流变应力。
The effect of carbon and silicon on the occurrence of dynamic recrystallization as well as on the flow stress of steel was investigated. For this purpose, three grades of steels including low carbon, medium carbon and high silicon low carbon steel were examined. Single hit experiments at temperatures of 900–1200°C and strain rate of 0.01–2 s−1were performed to determine the phase transformation kinetics. Different socking times were utilized to detect the effect of initial austenite grain size on the kinetics of dynamic recrystallization and flow behavior of the steels. It was found that increasing the carbon content leads to a higher rate of dynamic recrystallization at high temperatures and low strain rates, while silicon causes postponement of the occurrence of dynamic recrystallization. Moreover, increasing the initial austenite grain size postpones the onset of dynamic recrystallization and leads to a higher flow stress at equivalent deformation conditions.