摘要
目的研究第3代高强钢——QP钢在实际零件上应用涉及的成形特性问题。方法通过微观组织分析、单向拉伸、成形极限、V形弯曲回弹等试验,分析探讨了QP钢的力学性能、成形性能、成形极限和弯曲特性,并与广泛应用的DP钢对比。结果 QP钢HC600/980QP的成形性能好于相同强度级别的DP钢HC550/980DP,与HC420/780DP相当;QP钢弯曲回弹量比同等强度级别DP钢大。通过2个试冲零件的分析,验证了QP的成形特性,并从零件应用角度提出了QP钢的零件适用范围和零件设计要点。结论 QP钢具有综合的强度和塑性性能,有助于解决局部特征复杂的难成形零件和具有等截面特征的零件,在汽车车身结构件上有较大的应用前景。
The paper aims to study forming characteristics of the third generation high strength steel QP steel. By comparing with DP steel, mechanical properties, forming properties, forming limit and bending properties of QP steel were analyzed with microstructure analysis, tensile test, forming limit and V-shape bending test. QP steel had excellent formability. HC600/980QP performed better than the same strength level of HC550/980DP, and was equal to HC420/780DP. For bending springback, QP steel was slightly larger than the same strength grade DP steel. Forming characteristics of QP were verified through analysis of the two stamped parts. Range of application and key point of design of parts for QP steel were proposed from application of QP steel parts. QP steel has comprehensive strength and plastic properties, and is helpful to solve the forming problems for parts with complex local features or equal section characteristics. It has a great application prospect in structure parts for car body.
出处
《精密成形工程》
2017年第4期79-84,共6页
Journal of Netshape Forming Engineering
关键词
QP钢
成形特性
冲压
高强钢
QP steel
stamping
formability
high strength steel
