Hot Deformation Behavior and Hot Processing Map of 4Cr5MoSiV1 Steel
Abstract: The hot deformation characteristics of 4Cr5MoSiV1 steel have been investigated by hot compression tests in the temperature range of 950˚C to 1100˚C at strain rates of 0.01 s−1 to 10.0 s−1 and maximum engineering strain of 50% by means of Gleeble-1500D thermal mechanical simulator. The results show that the true stress-strain curves exhibited oscillation behavior at strain rates of 10.0 s−1. The activation energy of 4Cr5MoSiV1 steel was calculated as 416.16 kJ·mol−1 and the constitutive equation was developed, namely on the basis of the testing data. The constitutive equation and testing results were nearly consistent by verification. The hot processing map developed base on dynamic materials model was divided into two domains. The stability domain appeared at lower strain rates (0.01 s−1 and 0.1 s−1), and at testing temperature 1050˚C, with a peak efficiency of power dissipation of 0.3. The instability domain appeared at higher strain rates (1 s−1 and 10 s−1). The optimum hot working condition was determined in the stability domain by combining with microstructure analysis.
文章引用: 康福伟 , 王焕敏 , 张雪敏 , 白 鑫 , 张 强 , 郭二军 (2013) 4Cr5MoSiV1钢的热变形行为及热加工图。 材料科学， 3， 1-6. doi: 10.12677/MS.2013.31001
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