锻压技术

模具间隙对高强度钢热冲压过程的影响

英文标题：Influence of die clearance on hot stamping process for high strength steel

作者：邹伟张立强刘灿军

分类号：TG76

出版年,卷(期):页码：2017,42(11):37-41

摘要：

利用DEFORM软件，建立了不等模具间隙下高强度钢板热冲压的有限元模型，研究了模具间隙对22MnB5钢板热冲压成形中温度场以及马氏体转变的影响规律。数值模拟结果表明：模具间隙是影响板料温度变化的主要因素，板料的最大温差随着模具间隙先增大后减小；模具间隙为0.95t～1.00t时，板料各部位的马氏体分布均匀，转变率高。在此基础上，进行了热冲压试验，测试了板料侧壁位置点和底部圆角位置点的温度变化，并观察了板料成形后的微观组织，通过试验结果与数值模拟结果一致性对比，验证了数值模拟结果的可靠性与准确性。

A finite element model of the hot stamping for high strength steel was established under different die clearances by DEFORM software, and the influences of die clearances on temperature field and martensite transformation of steel sheet 22MnB5 were studied. The numerical simulation results indicate that the die clearance is the main factor influencing the temperature change of part, and the maximum temperature difference of part increases with the increase of die clearance and then decreases. Furthermore, the martensite in every part of sheet is homogenously generated and has a higher transformation rate while the die clearance is 0.95t-1.00t. Therefore, the hot stamping experiment was executed based on the numerical simulation results, and the temperature changes in the position of sidewall and bottom corner of part were tested. Finally, the microstructures of sheet were observed, a good agreement between numerical simulation and experimental results was verified, and the reliability and validity of numerical simulation results were verified.

基金项目：

湖南省教育厅资助科研项目（13B145）；湖南省大学生研究性学习和创新性实验计划项目(201510538010)

作者简介：邹伟（1991-），男，硕士研究生 E-mail：429606865@qq.com 通讯作者：张立强（1978-），男，博士，副教授 E-mail:zlq2k1103@126.com

参考文献：

[1]王明伟, 高莹莹, 吕艳, 等. 高强度钢汽车加强板冲压成形数值仿真及试验[J]. 锻压技术, 2017, 42(2): 60-65.

Wang M W, Gao Y Y, Lyu Y, et al. Numerical simulation and test of stamping forming for automobile reinforcing plate with high strength steel [J]. Forging & Stamping Technology, 2017, 42(2): 60-65.

[2]Javidan F, Heidarpour A, Zhao X L, et al. Application of high strength and ultra-high strength steel tubes in long hybrid compressive members: Experimental and numerical investigation [J]. Thin-walled Structures, 2016, 102: 273-285.

[3]何育军, 谢廷敏, 田银, 等. 热冲压成形数值仿真及模具冷却系统参数研究[J]. 锻压技术, 2015, 40(11): 148-154.

He Y J, Xie T M, Tian Y, et al. Numerical simulation of hot stamping and parameter study of die cooling system [J]. Forging & Stamping Technology, 2015, 40(11):148-154.

[4]赵运运, 李亨, 李明, 等. 汽车B柱高强度钢热冲压工艺[J]. 锻压技术, 2017, 42(2): 66-71.

Zhao Y Y, Li H, Li M, et al. Hot stamping process of high-strength-steel for automotive B-pillar [J]. Forging & Stamping Technology, 2017, 42(2): 66-71.

[5]李俊琛, 顾自有, 胡彦昭, 等. 22MnB5高强板冲压成形热力耦合数值模拟[J]. 锻压技术, 2017, 43(1): 15-18.

Li J C, Gu Z Y, Hu Y Z, et al. Numerical simulation of thermal-mechanical coupling during stamping forming of 22MnB5 high strength plates[J]. Forging & Stamping Technology, 2017, 43(1): 15-18.

[6]刘文权, 盈亮, 王丹彤, 等. 热冲压成形过程细观损伤演化机理研究[J]. 机械工程学报, 2016, 52(14): 31-39.

Liu W Q, Ying L, Wang D T, et al. Investigation of mesoscopic damage evolution mechanism of high strength steel in hot stamping process [J]. Journal of Mechanical Engineering, 2016, 52(14): 31-39.

[7]刘春雨, 郑薇. 热成形件模具结构的研究与设计[J]. 锻压技术, 2016, 41(11): 110-115.

Liu C Y, Zheng W. Research and design on die structure for hot forming part [J]. Forging & Stamping Technology, 2016, 41(11): 110-115.

[8]吴斌, 严勇, 董芳. 典型热冲压件成形工艺研究[J]. 热加工工艺, 2017, 46(3): 132-134.

Wu B, Yan Y, Dong F. Study on forming process of typical hot stamping parts [J]. Hot Working Technology, 2017, 46(3): 132-134.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】