Numerical Simulation And Process Parameter Optimization Of 1.6mm Thick 22MnB5 Steel Sheet Hot Stamping

Automobile lightweighting has become the trend of world automobile development.In the lightweight design of automobile materials,the advanced molding technology for automobile parts is one of its core contents.High-strength steel hot stamping technology is a new technology developed by the automobile manufacturing industry to meet the requirements of social development.It uses the physical and chemical characteristics of high-strength steel to achieve the purpose of greatly improving the strength and impact resistance of the formed parts.In this paper,22MnB5 high-strength steel is used as the research material,and the U-shaped steel plate of the automobile B-pillar beam is simplified as the research object.The internal performance changes of the high-strength steel during the hot stamping process and the selection of reasonable process parameters are studied.And scholars have provided references.In this paper,based on the theoretical knowledge of macro heat conduction and microstructure transformation process of sheet hot forming,based on the characteristics of hot stamping of 22mmB5 high-strength steel with 1.6mm thickness,a half model of U-shaped steel plate is established using ABAQUS simulation software.Using speed,temperature and time as the control parameters for numerical simulation,the sheet metal hot stamping process is numerically simulated.The analysis of the stress field,thickness and temperature field distribution of the sheet at the end of the stamping proves the high strength steel hot stamping finite element model And the validity of the data.Combined with the single variable method,the effects of the initial sheet temperature,stamping speed and die temperature on the hot stamping of the sheet during hot stamping are studied.The method of combining orthogonal test design and numerical simulation is used to study the significance of each process parameter that affects the hot stamping process of high-strength steel.Range analysis and variance analysis are used to determine the initial temperature of the sheet material and the initial temperature of the die during the stamping stage.Combined with the optimal level of stamping speed,the best process parameter combination is obtained as the initial temperature of the sheet is 900℃,the stamping speed is 50mm/s and the initial temperature of the mold is 125℃,and the optimization results are verified by numerical simulation.