高强度钢板热冲压成形传热基础研究

Basic Study on Heat Transfer of High Strength Sheet During Hot Stampming

高强钢板热成形是一个复杂的热交换过程。在热成形过程各个不同的阶段,热传导、热辐射、热对流交互作用而强弱各异。无论热成形是过程控制还是模拟,都需要对各种传热模式相对强弱及其影响因素进行分析和评估,进而合理的简化传热模型以有利于过程控制和模拟。在评估各种传热模式相对强弱及其影响因素时,传热理论分析和实验测量相辅相成。在传热分析过程中引入综合换热系数,可对整个热成形过程及传热影响因素进行综合地评估,从而指导工业生产。

Hot forming high-strength steel sheet is a complex heat transfer process. Heat conduction, radiation and convection act each other in various stages of hot forming, and the strength of each heat transfer is different. Whether hot forming is process control or numerical simulation, the relative strength and the influence factors of various heat transfer pattern need analyzing and assesing. Then heat transfer model was simplified reasonably to facilitate the control and simulation. When assessing relative strength and the determinant factors of various heat transfer pattern,theoretical analysis and specific experimental measurement supplemented each other. In analyzing heat transfer process, the comprehensive heat transfer coefficient was introduced, which can synthetically appraise the whole hot forming process and influencing factors of different heat transfer pattern to guide the industrial oroduction.