摘要
采用Gleeble-1500热模拟机单道次热压缩实验,研究了变形温度850～1 000℃和变形速率0.1～10s^(-1)条件下合金工具钢SKS51(/%:0.78C、0.20Si、0.40Mn、1.5Ni、0.30Cr)的动态再结晶行为。实验结果显示SKS51钢动态再结晶在高的变形温度和低的变形速率情况下更易发生,回归法得出动态再结晶的变形激活能和应力指数分别为336.79 kJ/mol和4.26,并在此基础上建立了动态再结晶峰值应变(ε_p)、稳态应变(ε_s)及临界应变(ε_c)模型。
The behavior of dynamic reerystallization of alloy tool steel SKS51 （/% ： 0. 78C, 0. 20Si, 0. 40Mn, 1.5Ni, 0. 30Cr） in single pass hot compression test with strain rate 0. 1 - 10 s-1 at 850 - 1 000 ℃ is studied by using Gleeble-1500 thermo-mechanical simulator. Results show that the dynamic recrystallization of steel SKS51 more easily occurs with lower strain rate at higher deformation temperature; by regression analysis the deformation activation energy and stress exponent of dynamic recrystallization of steel are respectively 336.97 kJ/mol and 4. 26, and based on this foundation the peak strain （sp） , stable strain （εs） and critical strain （εc） model are established.
出处
《特殊钢》
北大核心
2013年第2期59-61,共3页
Special Steel
基金
中国博士后科学基金资助项目(No.2012M511282)
广东省重大科技专项(No.2010A080407003)
