锻压技术

低合金高强度钢HC500LA成形性能研究

英文标题：Research on the formability of high-strength low-alloy steels HC500LA

单位：1.宝山钢铁股份有限公司 2.汽车用钢开发与应用技术国家重点实验室（宝钢）

关键词：低合金高强度钢成形极限回弹

分类号：

出版年,卷(期):页码：2015,40(7):23-28

摘要：

以宝钢生产的低合金高强度钢HC500LA为研究对象，对其成形特性进行了研究，通过单向拉伸实验，获得材料的基本力学性能，通过成形极限实验，研究了其在不同应变状态下的成形特性。结果表明，HC500LA材料的伸长率在20%左右，同时其成形极限的FLD0接近20%，具有良好的成形性能。通过U弯和V弯回弹实验，分析了该材料的回弹规律。V弯试验表明，材料的回弹量与弯曲角度、凸模圆角半径有关，且存在正、负回弹，可通过调整弯曲角度或弯曲模具圆角大小来合理控制零件回弹。U弯试验表明，材料的回弹量与施加的压边力有关，可通过调整压边力来减小零件的回弹。最终将该材料进行汽车座椅滑轨的试制，滑轨零件的成形效果较好。

The formability was studied for the high-strength low-alloy steels HC500LA produced by Baosteel. Firstly the basic mechanical property was obtained by tensile experiment, and then the formability characteristics at different strain states were studied by forming limit experiment. The results show that the elongation of HC500LA is 20% and the forming limit strain FLD0 approaches to 20%, which shows a good formability. The springback law was analyzed by U and V bending tests. The V bending test shows that the springback has a relationship with bend angel and punch radius. Furthermore, positive springback and negative springback happen in V bending. So the springback can be controlled by adjusting bend angel and punch radius properly. The U bending test shows that the blank holder force influences the springback, which can be reduced by adjusting the blank holder force. Finally, the material is used to produce the car seat slide which shows a good formability.

基金项目：

牛超（1989-），男，硕士，助理工程师

参考文献：

[1]张爱文, 郑磊. 汽车用低合金高强度钢成份及控冷工艺[J]. 机械工程材料, 2006, 30 (12):11-14.

Zhang A W, Zheng L . Chemical compositions and cooling processes of high strength low alloy steel for automobile[J]. Materials for Mechanical Engineering, 2006, 30 (12):11-14.

[2]刁克山, 蒋浩民, 陈新平. 基于成形特性的宝钢QP980实验研究及典型应用[J]. 锻压技术, 2012, 37 (6):113-116.

Diao K S, Jiang H M, Chen X P. Research and typical application of QP980 steel produced by Baosteel based on formability[J]. Forging & Stamping Technology, 2012, 37 (6):113-116.

[3]JIS Z2241—2011,金属材料的拉伸试验方法[S].

JIS Z2241—2011, Metallic materials —Tensile testing —Method of test at room temperature[S].

[4]GB/T 228.1—2010, 金属材料拉伸试验室温试验方法[S].

GB/T 228.1—2010, Metallic materials-Tensile testing-Method of test at ambient temperature[S].

[5]赵利军. 铜/铝覆层板成形极限的理论分析和试验研究[D]. 西安:西安交通大学, 2007.

Zhao L J. Theory Analysis and Experimental Study on Cu/Al Clad Sheet[D].Xian: Xian Jiaotong University, 2007.

[6]Keeler S P, Backofen W A. Plastic instability and fracture in sheets stretched over rigid punches [J]. Transactions of the American Society of Metals, 1965, 56:25-48.

[7]曹宏深.复合变形路径下的板材冲压成形极限应变（II）-冲压成形极限应变的计算与试验[J].机械工程学报, 2009，45(1)：124-130.

Cao H S. Limit strains of sheet metal forming under broken-line strain paths(II)-Calculating and testing on the limit strains for sheet matal forming[J]. Journal of Mechanical Engineering,2009,45(1):124-130.

[8]GB/T 15825.8—2008,金属薄板成形性能与试验方法第8部分:成形极限图(FLD)测定指南[S].

GB/T 15825.8—2008, Sheet metal formability and test methods-Part 8: Guidelines for the determination of forming-limit diagrams[S].

[9]顾然,徐岩,高霖,等. 基于图像技术的板料成形极限试验方法研究[J].机械科学与技术, 2010,(29): 861-865.

Gu R, Xu Y, Gao L, et al.A limit experimental method of sheet metal forming based on image recognition technology[J]. Mechnical Science and Technology for Aerospace Engineering, 2010,(29): 861-865.

[10]陈超, 吴有伍, 夏忠禹. 铝合金板材V型弯曲回弹研究[J]. 模具工业, 2006, 32 (12):43-46.

Chen C, Wu Y W, Xia Z Y. Study on springback of V-shaped bending of aluminum alloy sheet[J]. Die & Mould Industry, 2006, 32 (12):43-46.

[11]徐雅冬. U型件弯曲回弹的预测及优化方法的研究[D]. 天津：天津理工大学, 2008.

Xu Y D. The Study of U-shape Bending Springback Prediction and Optimizing Method[D]. Tianjin：Tianjin University of Technology, 2008.

[12]陈磊, 杨继昌, 张立文. 板料弯曲回弹影响因素的有限元模拟研究[J].材料科学与工艺, 2007, 15 (2): 269-272.

Chen L, Yang J C, Zhang L W. Research on the factors influencing bending springback of sheet metal by FEM[J]. Material Science & Technology, 2007, 15 (2)： 269-272.

服务与反馈：

【文章下载】【加入收藏】