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采用热膨胀仪对船板钢NVE36进行了连续冷却转变曲线(CCT曲线)的测定,并用显微镜观察其室温组织,用维氏硬度仪测定了组织硬度.利用Matlab软件平台对实验数据进行处理,建立了相变点温度-冷却速率关系模型及动力学回归模型,回归计算得到该钢种的最优模型系数.最后对比了NVE36钢在连续冷却过程中实验和回归模拟的动力学行为.结果表明计算值与实验值吻合很好,证明所建立模型的合理性及数据处理方法的可行性.
The continuous cooling transformation curve (CCT curve) of ship plate steel NVE36 was measured by thermal expansion instrument, and its tissue was observed under microscope.The hardness of the tissue was measured by Vickers hardness tester.The experimental data were processed by Matlab software platform, Phase transition temperature-cooling rate model and kinetic regression model, the optimal model coefficients of the steel were obtained by regression calculation.Finally, the dynamic behavior of NVE36 steel during continuous cooling process and regression simulation was compared.The results show that the calculated value It is in good agreement with the experimental data to prove the rationality of the model and the feasibility of the data processing method.