22MnB5钢板热冲压工艺数值模拟及试验  

Numerical Simulation and Experiment of Hot Stamping Process with 22MnB5 Steel

作　　者：巩子天纵[1] 李凌风[1] 李萍[1] 梁辰[1] 薛克敏[1] 李君[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,合肥230009

出　　处：《精密成形工程》2014年第4期19-23,57,共6页Journal of Netshape Forming Engineering

基　　金：安徽省优秀青年科技基金滚动支持项目(1308085JGD02)

摘　　要：目的研究热冲压过程中板料的温度变化及相变情况。方法采用Abaqus软件建立了热力耦合模型,对U形件热冲压成形及冷却淬火过程进行了数值模拟,分析了板料及模具的温度分布变化,并研究了板料不同区域的冷却速率,最后进行了热冲压试验。结果研究结果表明,板料经冷却淬火后,温度分布均匀,且冷却速率均大于临界冷却速率,板料可以发生完全马氏体相变。结论板料的底部冷却速率最快,淬火后为分布均匀的、细小的马氏体组织,最终通过热冲压试验验证了模拟结果的准确性。Objective To study the temperature distribution and phase transformation of blank in hot stamping process.Methods The thermo- mechanical model was established in Abaqus software to simulate the U- shaped part forming and quench cooling process. The temperature distribution of blank and die and cooling rate were analyzed in this study. The hot stamping experiment was conducted to validate the simulation. Results The results showed that the temperature of blank was uniformly distributed after the quench cooling process. The cooling rate of blank was greater than the critical cooling rate and the martensitic phase transformation occurred completely in the blank. Conclusion The microstructure was all fine martensite and distributed uniformly at the bottom owing to its fastest cooling rate among the three areas of the blank. The accuracy of simulation was verified with the hot stamping experiment.

关 键 词：22MnB5 热冲压 马氏体相变 

分 类 号：TG306[金属学及工艺—金属压力加工]