锻压技术

预变形对先进高强钢边部变形能力的影响

英文标题：Influence of pre-deformation on edge deformability for advanced high strength steel

作者：李涛周慧春刘宇刘辉刘洋

分类号：TG386.2

出版年,卷(期):页码：2021,46(6):112-116

摘要：

汽车板冲压成形过程中，高强钢的翻边、扩孔等边部变形多数在拉延变形工序后进行，以原板的扩孔率来评价材料的边部变形能力往往误差较大。基于此，选取了两种成分体系的先进高强钢HC420/780DP，利用单轴预拉伸及预拉伸后的标准扩孔试验，研究了预变形对先进高强钢HC420/780DP的边部变形能力的影响及其变化规律。研究结果表明：沿着轧向和垂直于轧向的预变形中，边部裂纹扩展的方向均与预变形的方向一致；随着预变形量的增加，先进高强钢HC420/780DP的边部变形能力降低，且CSiMn成分体系的先进高强钢HC420/780DP的边部变形能力降低得更为明显；当预变形量相同时，随着板材厚度的增加，先进高强钢HC420/780DP的边部变形能力整体呈下降趋势。

In the stamping process of automobile sheet, the edge deformation of high-strength steel, such as flanging and hole expansion, is mostly carried out after the drawing process, and the evaluation of the edge deformability of materials based on the hole expansion ratio of the original plate is often of great error. Based on this, for two kinds of HC420/780DP advanced high strength steels with two kinds of component systems, the influences of pre-deformation on the edge deformability for HC420/780DP advanced high strength steel and its change laws were studied respectively by uniaxial pre-stretching and standard hole expanding test after pre-stretching. The results show that the direction of edge crack propagation is consistent with the direction of pre-deformation in the pre-deformation along the rolling direction and perpendicular to the rolling direction. With the increasing of pre-deformation amounts, the edge deformability of advanced high strength steel HC420/780DP decreases, and the edge deformability of HC420/780DP advanced high strength steel for C-Si-Mn component system decreases more obviously. Furthermore, when the pre-deformation amount is the same, the edge deformability of HC420/780DP advanced high strength steel decreases with the increasing of sheet thickness.

基金项目：

李涛（1977-），男，博士，高工 E-mail：13832509476@163.com

参考文献：

[1]李扬, 刘汉武, 杜云慧. 汽车用先进高强钢的应用现状和发展方向[J]. 材料导报, 2011,（13）: 101-104.

Li Y, Liu H W, Du Y H. Applications and developments of AHSS in automobile industry[J]. Materials Review,2011,（13）: 101-104.

[2]张燕瑰, 邓劲松, 魏宪波. 高强度钢性能及其在车身中的应用[J]. 精密成形工程, 2013,5(4): 64-68

Zhang Y G, Deng J S, Wei X B. A study on performance of high strength steel and application in bodywork[J]. Journal of Netshape Forming Engineering, 2013,5(4): 64-68.

[3]王存宇, 杨洁,常颖,等.先进高强度汽车钢的发展趋势与挑战[J].钢铁,2019,54(2):7-12.

Wang C Y, Yang J, Chang Y, et al, Development trend and challenge of advanced high strength automobile steels[J]. Iron and Steel, 2019,54(2):7-12.

[4]庄厚川, 宋起峰,韩志勇,等.先进高强度汽车钢板应用中面临的挑战[J]. 汽车工艺与材料, 2015,(6): 42-45.

Zhang H C, Song Q F, Han Z Y, et al. Challenges in application of advanced high strength automobile steel sheets[J]. Automobile Technology & Material, 2015,(6): 42-45.

[5]阎换丽, 周佳,万鑫铭,等，汽车用几种先进高强钢焊点动态冲击性能研究[J].汽车工程学报, 2020,10(3):157-163,179.

Yan H L, Zhou J, Wan X M, et al. Study on dynamic mechanical properties spot welds for advanced high strength steels[J]. Chinese Journal of Automotive Engineering, 2020,10(3):157-163,179.

[6]王淑俊，王双枝，刘莉，等. 980QP先进高强钢的冲压成形工艺 [J].锻压技术，2019,44(4):64-68.

Wang S J，Wang S Z，Liu L，et al. Stamping process of advanced 980QP high strength steel [J]. Forging & Stamping Technology，2019,44(4):64-68.

[7]刘华赛, 吴耐, 李振. 连退双相钢DP1000压扁开裂原因及机理分析[J]. 物理测试, 2018, 36(6): 35-40.

Liu H S, Wu N, Li Z. Flattening cracking cause and its mechanism analysis of the continuous annealed DP1000 steel[J]. Physics Examination and Testing, 2018, 36(6): 35-40.

[8]Daniel Casellas, Antoni Lara, David Frómeta，et al. Fracture toughness to understand stretchflangeability and edge cracking resistance in AHSS[J]. Metallurgical & Materials Transactions A，2017, 48(1): 86-94.

[9]赵广涛，牛超，陈新平. 先进高强钢边部成形极限预测方法 [J]. 锻压技术，2020,45(5):88-93.

Zhao G T，Niu C，Chen X P. Prediction method of edge forming limit for advanced high strength steel [J]. Forging & Stamping Technology，2020,45(5): 88-93.

[10]董梁. 高强钢板材剪切边缘局部成形性能表征及开裂预测研究[D]. 上海：上海交通大学,2017.

Dong L. Characterization on Local Formability of Sheared Edge and Prediction of Edge Cracking for High Strength Steel Sheet[D]. Shanghai： Shanghai Jiao Tong University, 2017.

[11]韩龙帅, 郑学斌, 李少博，等, 高强钢冲裁断面质量模具间隙敏感性分析[J]. 中国冶金, 2018, 28(7): 37-40.

Han L S, Zheng X B,Li S B, et al. Analysis of die clearance sensitivity of highstrength steel blanking section quality[J]. China Metallurgy, 2018, 28(7): 37-40.

[12]Ingwer A Denks, Matthias Schneider, Sebastian Westhuser, et al. On the correlation between suitable material parameters for the prediction of local formability of advanced high strength steels[J]. Steel Research International, 2019, 90(6):1-16

[13]吴青松, 祝洪川, 王立新,等. 汽车用不同显微组织高强钢板的扩孔性能[J]. 机械工程材料，2016, 40(6):42-45,58.

Wu Q S, Zhu H C, Wang L X, et al. Hole expansion properties of high strength automobile steel plates with different microstructures[J]. Materials for Mechanical Engineering, 2016, 40(6):42-45,58.

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