基于使用特性的唐钢QP980和DP980对比分析及典型应用

张茜 刘宇 吕浩 牛星辉

⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯张茜 刘宇 吕浩 牛星辉Comparative Analysis of HBIS QP980 and DP980 Based on Forming Characteristics and Typical Application ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯Zhang Xi, Liu Yu, Lv Hao, Niu Xinghui

063000） （唐山钢铁集团有限责任公司，唐山

/V形翻边、U DP980

摘要：采用单向拉伸、应变分析、扩孔、直角 形弯曲等试验方法，对比分析唐钢 和

QP980在加工硬化、成形极限、翻边扩孔、弯曲回弹等使用特性中的差异。结果显示，QP980具有良好的整体

成形性，A80 18.5%，与DP980

延伸率高达 相比，在变形中保持较高的瞬时n值；成形极限图中平面应变的最低点

QP980 DP980 9%左右；DP980 QP980表现优良；DP980 U较 高 在扩孔、翻边特性中较 在 弯回弹中回弹量较大，在零件设计时需考虑更大的回弹补偿。相比而言，QP980更适合以拉延为主的高强钢结构件，DP980更适合以折弯、翻边为主的高强钢梁类件。

关键词：DP980 QP980 成形 翻边 回弹中图分类号：U465.1+1 文献标识码：B 10.19710/J.cnki.1003-8817.20210015 DOI:

Comparative Analysis of HBIS QP980 and DP980 Based on Forming Characteristics and Typical Application

Zhang Xi, Liu Yu, Lv Hao, Niu Xinghui

（Tangshan Iron and Steel Group Co., Ltd., Tangshan 063000） Abstract：in this paper, test methods including uniaxial tension, strain analysis, reaming, right angle/v-shaped flanging and U-shaped bending are used to compare and analyze the difference of operating characteristics between DP980 and QP980 in process hardening, forming limit, flanging and reaming, bending and springback. The results show that: QP980 has good global formability, and the elongation of A80 reaches 18.5%; compared with DP980, QP980 keeps higher instantaneous value during deformation. For the lowest point of plane strain in forming limit diagram,

n

QP980 is about 9% higher than DP980. DP980 performs better than QP980 in hole expanding and flanging. DP980 has a large amount of springback in U-bending, more springback compensation should be considered when designing parts. In contrast, QP980 is more suitable for high-strength steel structural parts mainly for design drawings, while DP980 is more suitable for high-strength steel beam parts mainly for bending and flanging. Key words: DP980, QP980, Forming, Flanging, Springback

1 前言

随着能源环保问题日益严峻，碰撞法规要求日益严苛，在保证安全的前提下进行轻量化设计是目前汽车工业的发展方向[1- 2] ，白车身占整车重

50%左右，对车身骨架零件进行轻量化设计是

量的

实现整车轻量化的关键。提高高强钢、超高强钢在车身上的应用比例，仍然是车身轻量化最经济、有效的方法。目前中高

A柱、B

端车型中 柱、门槛、防撞梁等车身安全件均

Dp、trip MS

等高强钢[3-4]，但

已广泛采用双相钢 钢和某些高强钢由于成形性能限制，尚不能满足一些对

作者简介：张茜（1991—），女，工程师，硕士学位，主要从事汽车板冲压成形仿真、回弹等使用技术研究。

参考文献引用格式：张茜，刘宇，吕浩，等. QP980 DP980对比分析及典型应用[J].汽车工艺与材料，2021（7）：19-24.

基于使用特性的唐钢 和

ZHANG X, LIU Y, LV H, et al. Comparative Analysis of HBIS QP980 and DP980 Based on Forming Characteristics and Typical Application [J]. Au⁃ tomobile Technology & Material, 2021(7): 19-24.