论文部分内容阅读
利用双道次热压缩实验,在Gleeble-3500型热模拟机上研究了金属材料高铁螺纹道钉钢TD16的静态再结晶行为,分析了不同变形温度、应变、应变速率和初始晶粒尺寸对高铁螺纹道钉钢TD16的静态再结晶体积分数的影响。借助金相显微镜,对单道次热压缩后的试样进行微观组织分析,获得静态再结晶晶粒尺寸。基于实验数据进行线性回归分析确定材料的相关参数,从而建立了高铁螺纹道钉钢TD16静态再结晶的动力学模型和晶粒尺寸模型。通过不同热变形工艺参数下高铁螺纹道钉钢TD16静态再结晶动力学模型预测值与实验值的对比可知,实验数据与预测数据吻合良好,从而较好的验证了高铁螺纹道钉钢TD16动力学模型的正确性。
The static recrystallization behavior of TD16, a high-iron screw steel, was studied on a Gleeble-3500 thermal simulator using two-pass thermal compression test. The effects of different deformation temperature, strain, strain rate and initial grain size on the hot- Effect of static recrystallization volume fraction on TD16 steel. By means of metallographic microscope, microstructural analysis of single-pass hot-compressed samples was carried out to obtain the static recrystallized grain size. Based on the experimental data, linear regression analysis was used to determine the relevant parameters of the material, so as to establish a dynamic model and a grain size model for static recrystallization of high-speed railway screw spike steel TD16. Through the comparison of the predictive value and experimental value of static recrystallization model of TD16 screwdriver steel with different thermal deformation process parameters, the experimental data are in good agreement with the predicted data, so as to verify the TD16 kinetics Correctness of the model.