基于热-力耦合和变摩擦因数的高强钢冷冲压成形性

中国机械工程

基于热-力耦合和变摩擦因数的高强钢冷冲压成形性

聂昕;谭广;乔晓勇

湖南大学汽车车身先进设计制造国家重点试验室，长沙，410082

出版日期:2018-08-25 发布日期:2018-08-27
基金资助:
国家自然科学基金资助重点项目（61232014）；
广西壮族自治区科技计划资助项目（桂科攻1348005?1，桂科攻14122005?7）；
汽车用钢开发与应用技术国家重点实验室2017年度开放课题
National Natural Science Foundation of China （No. 61232014）

Formability of HSS in Cold Stamping Based on Variable Friction Coefficient and Thermal-mechanics Coupling

NIE Xin;TAN Guang;QIAO Xiaoyong

State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body，Hunan University，Changsha，410082

Online:2018-08-25 Published:2018-08-27
Supported by:
National Natural Science Foundation of China （No. 61232014）

摘要/Abstract

摘要： 测定了DP780高强度双相钢在不同温度下的摩擦因数，建立了变摩擦因数模型,研究了热-力耦合和变摩擦因数对室温冷成形的影响。结果显示，热变组仿真分析
部分区域温度明显升高，相比参照组相同区域，板料减薄程度更小，不易开裂，表现出更好的延展性。从回弹偏移量看，热变组的值比冲压实验测量值偏小，而参照组的值偏大，且相比冲压实验测量值的误差，热变组仅为参照组的27.8%，与冲压实验符合度更好。

关键词: 变摩擦因数, 流变应力, 热-力耦合, 高强钢

Abstract: Measured friction coefficient of DP780 dual phase HSS under different temperatures，a novel variable friction coefficient model was
established，and the formability during room temperature cold stamping was researched based on thermal-mechanics coupling and variable friction
coefficients.The results show that temperature is increased obviously in some areas of sheet metal in heat variable（HV） groups，and comparing the
same places with compared groups，the thinning ratio is smaller，not easy to crack，better ductility are showed.From spring-back displacement
contour，values in HV groups are smaller than the measured values in stamping experiments.However values in compared groups are bigger，and
compared with the experimental measured values，the errors of HV groups are only 27.8% of compared groups，and are agreed with stamping
experiments better.

Key words: variable friction coefficient, flow stress, thermal-mechanics coupling, high strength steel（HSS）

中图分类号:

TG386.41

聂昕;谭广;乔晓勇. 基于热-力耦合和变摩擦因数的高强钢冷冲压成形性[J]. 中国机械工程.

NIE Xin;TAN Guang;QIAO Xiaoyong. Formability of HSS in Cold Stamping Based on Variable Friction Coefficient and Thermal-mechanics Coupling[J]. China Mechanical Engineering.

参考文献

[1]KEELER S，KIMCHI M.Advanced High-Strength Steels Application Guidelines V5[M］.Brussels：World Auto Steel，2015.
[2]胡朝辉，于万元，陈少伟，等.基于区域灵敏度及空间多层形貌的车身设计[J］.中国机械工程，2015，26（19）：2687-2692.
HU Chaohui，YU Wanyuan，CHEN Shaowei，et al.Car-body Design Based on Regional Sensitivity Analysis and Space-multi-layer Topography[J］.China Mechanical Engineering，2015， 26（19）：2687-2692.
[3]钟志华.薄板件冲压成形过程的计算机仿真[M］.北京：北京理工大学出版社，1997.
ZHONG Zhihua.Computer Simulation of Sheet Metal Stamping Formability Process[M］ Beijing：Beijing Institute Technology Press， 1997.
[4]KANG J H，INGENDAHL T，BLECK W.A Constitutive Model for the Tensile Behaviour of TWIP Steels：Composition and Temperature Dependencies[J］.Materials & Design，2016，90：340-349.
[5]PANICH S，BARLAT F，UTHAISANGSUK V，et al.Experimental and Theoretical Formability Analysis Using Strain and Stress Based Forming Limit Diagram for Advanced High Strength Steels [J］.Materials & Design， 2013，51（5）：756-766.
[6]PEREIRA M P，ROLFE B F.Temperature Conditions during 'Cold'Sheet Metal Stamping[J］.Journal of Materials Processing Technology，2014 ，214（8）：1749-1758.
[7]HUG E，MARTINEZ M，CHOTTIN J.Temperature and Stress State Influence on Void Evolution in a High-strength Dual-phase Steel [J］.Materials Science and Engineering：A，2015，626：286-295.
[8]OZTURK F，TOROS S，KILIC S.Tensile and Spring-back Behavior of DP600 Advanced High Strength Steel at Warm Temperatures [J］.International Journal of Iron and Steel Research，2009，16（6）： 41-46.
[9]孙利，于忠奇，罗益民.高强度钢板室温冲压成形中温度效应的数值仿真[J］.上海交通大学学报，2015，49（10）：1482-1486.
SUN Li，YU Zhongqi，LUO Yimin.Numerical Analysis of Temperature Field on the Contact Interface during Cold Stamping[J］.Journal of Shanghai Jiaotong University，2015，
49（10）：1482-1486.
[10]赵玉璋，王凯，王武荣，等.高强度双相 DP780 钢板冲压成形的变摩擦系数模型及其应用[J］.上海交通大学学报，2015，49（10）：1446-1451.
ZHAO Yuzhang，WANG Kai，WANG Wurong，et al.Application of Variable Friction Coefficient Model in Forming of Advanced High Strength Steel[J］.Journal of Shanghai Jiaotong University，2015，49（10）：1446-1451.
[11]LEU D K.A Simple Dry Friction Model for Metal Forming Process[J］.Journal of Materials Processing Technology，2009，209（5）：2361-2368.
[12]周国柱，罗仁平，董湘怀.板料成形中考虑油膜厚度和滑动速度的摩擦模型[J］.锻压技术，2016，41（4）：98-102.
ZHOU Guozhu，LUO Renping，DONG Xianghuai.A Friction Model Considering Lubricant Film Thickness and Sliding Speed in Sheets Metal Forming[J］.Forging ＆ Stamping Technology,2016，41（4）：98-102.
[13]王东星.不同参数对粗糙表面/平面滑动摩擦热-力耦合的影响[D］.福州：福州大学，2011.
WANG Dongxing.Influence of Different Parameters on the Thermo-mechanical Coupling of the Rough Surface to Flat Surface during Sliding Contact[D］.Fuzhou ：Fuzhou Univesity，2011.
[14]ZERILLI F J，ARMSTRONG R W.Dislocation-mechanics-based Constitutive Relations for Material Dynamics Calculations[J］.Journal of Applied Physics，1987，61（5）：1816-1825.
[15]曹强，张清东.先进高强度钢温变形特性分析及其本构关系的建立[C］// 第九届中国钢铁年会.北京，2013：1-6.
CAO Qiang，ZHANG Qingdong.Constitutive Modeling for Warm Temperature Flow Behavior of Advanced High Strength Steel[C］//The 9th China Steel Conference.Beijing，2013：1-6.