The Research On Numerical Simulation And Mechanical Properties Of H-beam During Controlled Cooling Process

H-beam controlled cooling is the use of residual heat for heat treatmentafter rolling technology, the technology can significantly improve the strength of thesteel and production performance, the process stability, low production costs, hasgreat development prospects.This topic model is H100x100x6x8(R=10), the material of Q235theH-beam as the research object, GID software is used to create a two-dimensionalmodel and meshing, reasonable boundary and heat transfer guide conditions and theuse of large-scale heat treatment analysis software COSMAP specimen underdifferent controlled cooling schemes. First of all, through the simulation oftemperature field to choose from the two optimal solution; Then, according to thestress field simulation to determine the optimal scheme of cooling; Finally, accordingto the plan to organize field simulation, analysis and research in order to observe thechange of organization, further analysis of cooling effect on the performance oforganization. Room temperature microstructure was analyzed by scanning electronmicroscopy and check the mechanical performance, resulting in the variation of thestructure and mechanical properties of microstructure, which provides a reference tofurther improve the mechanical properties of the controlled cooling value, at the sametime provides an important theoretical basis for the development of rational andcontrolled cooling process. According to the result of numerical simulation andcontrol of hot rolled H section steel cold test results, further verified the simulationvalue and the measured values.The main purpose of this topic is to determine the optimal control and coolingprocess parameters controlled cooling affect organizational change and its mechanicalproperties in the whole process. Through the simulation and experimental validation,find the optimal controlled cooling process: from the initial temperature of900℃, thefirst5s air-cooled, then at the average cooling rate of10℃/s cooling by water spray.The process can enable the comprehensive mechanical properties of the steel plateand the quality. Therefore, the subject whether it is in the actual productionapplications, or in theoretical research has a very important significance. Accuratelypredict the complex process of heat treatment microstructure, residual stress,deformation, hardness, etc. Finally it can realize the effect of energy saving andlow-cost design effect of heat treatment, laying an important foundation for the futureto fully tap the potential of the steel.