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为了合理制定35CrMnSi钢温成形工艺参数,利用热模拟实验对该材料在温成形条件下的变形抗力进行了研究,考察了变形温度、应变速率及变形程度与变形抗力之间的关系,并利用冶金学的方法对其进行了分析.结果表明:35CrMnSi钢在740～860℃变形时,具有较强的应变速率敏感性,变形抗力随应变速率的增加而上升;随应变速率的增大,温度对变形抗力的影响减弱;在较低温度成形时(740、780℃),变形抗力较低,并有明显的软化趋势;随着成形温度的升高,材料在发生相变后变形抗力上升,且表现出加工硬化的趋势.
In order to reasonably establish 35CrMnSi steel temperature forming process parameters, the deformation resistance of the material under warm forming conditions was studied by means of thermal simulation experiment. The relationship between deformation temperature, strain rate, deformation degree and deformation resistance was investigated. The results show that: 35CrMnSi steel at 740 ~ 860 ℃ deformation, has a strong strain rate sensitivity, deformation resistance increases with the increase of strain rate; with the strain rate increases, the temperature on the The effect of deformation resistance is weakened. At lower temperature (740 and 780 ℃), the deformation resistance is lower and the tendency of softening is obvious. As the forming temperature increases, the deformation resistance of the material increases after the phase transition, and Showing the trend of work hardening.