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本文用不同的奥氏体化温度和锻造变形方法,在40Cr钢上研究了不同状态(普通奥氏体化状态、动态再结晶状态及续动态再结晶状态)奥氏体的珠光体转变动力学。结果表明,不论是形变后处于再结晶状态的奥氏体,还是不同的奥氏体化温度而得到的奥氏体,它们的珠光体转变动力学,均受晶粒大小所控制。晶粒愈细小,单位体积内的晶界面积愈大,从而使相变核心数(?)愈多,导致珠光体转变速度的加快。
In this paper, the kinetics of pearlite transformation of austenite in different states (normal austenite state, dynamic recrystallization state and continuous dynamic recrystallization state) was studied on 40Cr steel with different austenitizing temperatures and forging deformation methods . The results show that the kinetics of the transformation of pearlite, whether austenite in the recrystallized state after deformation or austenite at different austenitization temperatures, are controlled by the grain size. The smaller the grain size, the larger the grain boundary area per unit volume, so that the more the number of phase transition nuclei (?) Leads to the faster pearlite transformation.