高强度热成形钢板冷却速率-强度-硬度预测  

Strength and hardness prediction based on cooling rate for hot forming high strength steel

作　　者：盈亮[1,2] 戴明华[1,2] 胡平[1,2] 范正帅[2] 申国哲[2] 史栋勇[3] 

机构地区：[1]大连理工大学工业装备与结构分析国家重点实验室,辽宁大连116024 [2]大连理工大学汽车工程学院,辽宁大连116024 [3]大连理工大学工程力学系,辽宁大连116024

出　　处：《吉林大学学报（工学版）》2014年第6期1716-1722,共7页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金重点项目(10932003;11272075);'973'国家重点基础研究发展计划项目(2010CB832700);国家工信部04重大专项项目(2011ZX04001-021);中央高校基本科研业务费专项资金项目(DUT14RC(3)032)

摘　　要：基于高强度钢板热成形平板模具分区冷却试验获得了淬火过程阶段冷却速度对机械强度-硬度的影响规律。采用量纲分析法建立了热成形材料冷却速率-机械强度-硬度指数模型,并验证了该模型的有效性。通过编制用户子程序将该模型引入自主开发的KMAS_HF软件平台中,实现了对典型U形热成形产品淬火后强度硬度的数值仿真预测。结果表明:该模型对热成形高强度钢淬火后机械性能仿真预测具有较好的适用性,为实现梯度硬度复合热成形工艺优化及产品性能分析提供了一种新的仿真分析流程。This paper investigates the effect of partitioned cooling on the mechanical strength and hardness of hot forming steel based on the flat tool cooling test.An exponential model of the mechanical strengthhardness-cooling rate was established using the dimensional analysis method,and this model was validated to be effective.By writing the user subroutine,this model was introduced into the prediction program in the selfdeveloped software KMAS_HF platform to validate the hardness and strength prediction of U-shape hot forming product.Results show that the model is reliable and applicable in predicting the mechanical properties of hot forming products,which can be used to guide the optimization of hot forming process and the design of hot forming tools.

关 键 词：金属材料 分区冷却 强度-硬度指数模型 量纲反推法 数值仿真 

分 类 号：TG376.2[金属学及工艺—金属压力加工]