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研究残余应力减量化技术可提高热轧带钢板形质量。有限元技术及相应的试验验证已广泛应用于工业生产,采用该方法对带钢层流冷却过程中的温度、相变及应力耦合进行求解,对于分析带钢轧后冷却不均、应力应变不均及翘曲具有重要意义。基于ABAQUS建立热轧带钢在密集冷却工艺条件下的有限元模型,实现温度、相变和应力三者的耦合计算,并进行温度测试、材料微观组织测试及应力测试等多个试验验证。计算结果表明,减小带钢进入层流冷却前的初始温差、采用边部遮挡技术对减少带钢残余应力均具有积极的意义。通过一个改善初始温差分布进而改善带钢残余应力的实例,验证了提出的方法和结论的正确性。
Research residual stress reduction technology can improve the quality of hot rolled strip shape. The finite element method and the corresponding experimental verification have been widely used in industrial production. The method is used to solve the temperature, phase transition and stress coupling in the laminar flow cooling process. For the analysis of uneven cooling after the strip rolling, the stress and strain are not Both warping is of great significance. Based on ABAQUS, the finite element model of hot rolled strip under intensive cooling process was established. Coupling calculation of temperature, phase transformation and stress was carried out. Several tests including temperature test, microstructure test and stress test were carried out. The calculation results show that reducing the initial temperature difference before the strip enters the laminar flow cooling and using the edge occlusion technique has a positive meaning to reduce the residual stress of the strip. Through an example of improving the initial temperature distribution and then improving the strip residual stress, the correctness of the proposed method and conclusion is verified.