摘要
利用Gleeble1500对BR1500HS超高强度钢进行高温下的力学性能测试以及测定其高温流变行为。通过在500~900℃实验下该材料的真实应力-应变曲线和高温流变性能数据建立BR1500HS的热冲压有限元模型。结果表明,板料减薄率比预测值稍大,但仍然在允许范围。板料热冲压成形前后冷却速率大于临界冷却速率,因此能有效促进马氏体转变。
The high temperature mechanical properties and high temperature rheological behavior of BR1500HS ultra-high strength steel were tested using Gleeblel500. The hot stamping finite element model of BR1500HS steel was established through true stress-strain curve and high temperature rheological property data at 500-900 ℃. The results show that the sheet reduction ratio slightly is bigger than the prediction value, but it is still in the allowed range. The sheet cooling rate before and after hot stamping is greater than the critical cooling rate, therefore it can effectively promote the martensitic transformation.
出处
《铸造技术》
CAS
北大核心
2015年第2期502-505,共4页
Foundry Technology
