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1Cr12Ni3Mo2VN是用于核电常规岛汽轮机末级叶片的新型钢种。在温度850℃~1 200℃,应变速率0.01s-1~20s-1条件下,利用Gleeble3500热模拟试验机对该钢种试样进行了等温压缩试验。采用双曲正弦函数描述流动应力、变形温度和应变速率的关系,获得了该钢种的高温本构关系方程,并采用试验数据验证了方程的准确性,为核电叶片锻造工艺的设计和模拟提供了合理的材料参数。
1Cr12Ni3Mo2VN is a new type of steel used for the last stage blades of conventional island turbines in nuclear power plants. Under the condition of temperature of 850 ℃ ~ 1 200 ℃ and strain rate of 0.01s-1 ~ 20s-1, the Gleeble3500 thermal simulation tester was used to carry out isothermal compression test. The hyperbolic sine function is used to describe the relationship between flow stress, deformation temperature and strain rate. The constitutive equations of high temperature of the steel are obtained. The accuracy of the equation is verified by the experimental data. The results provide the design and simulation of the forging process of nuclear blade A reasonable material parameters.