Hot Forming Simulation Algorithms of High-Strength Steels

2012 ◽  
pp. 113-151 ◽  
Author(s):  
Ping Hu ◽  
Ning Ma ◽  
Li-zhong Liu ◽  
Yi-Guo Zhu
Keyword(s):  
High Strength Steels ◽  
High Strength ◽  
Hot Forming ◽  
Forming Simulation ◽  
Simulation Algorithms

Modeling and FE Simulation of Quenchable High Strength Steels Sheet Metal Hot Forming Process

2010 ◽  
Vol 20 (6) ◽  
pp. 894-902 ◽  
Author(s):  
Hongsheng Liu ◽  
Jun Bao ◽  
Zhongwen Xing ◽  
Dejin Zhang ◽  
Baoyu Song ◽  
...  
Keyword(s):  
Sheet Metal ◽  
Fe Simulation ◽  
High Strength Steels ◽  
High Strength ◽  
Hot Forming ◽  
Forming Process

Design of Modern Steels for Automotive Application

2010 ◽  
Vol 638-642 ◽  
pp. 3111-3116 ◽  
Author(s):  
Harald Hofmann ◽  
Thomas Heller ◽  
Sascha Sikora
Keyword(s):  
High Strength Steels ◽  
Superplastic Forming ◽  
High Strength ◽  
Hot Forming ◽  
Automotive Application ◽  
Advanced High Strength Steels ◽  
Automobile Components ◽  
Multi Phase ◽  
Further Development ◽  
Complex Parts

Advanced high-strength steels offer a great potential for the further development of automobile bodies-in-white due to their combined mechanical properties of high formability and strength. New types of grades – multi-phase steels, superductile steels and density reduced steels – are under development at ThyssenKrupp Steel with tensile strength levels of up to 1000 MPa in combination with excellent formability for the high demands of cold formed structural automobile components. New forming technologies at increased temperatures – hot forming, semi-hot forming and superplastic forming - enable the processing of complex parts with extreme high strength. ThyssenKrupp Steel identifies potential future steels and technology concepts by technology monitoring and evaluates their potential for future applications in pre-development projects. University research institutions are significantly involved in this essential future oriented challenge. Seminal concepts are being implemented together with automotive manufactures by simultaneous engineering processes with coordinated phases of production and testing.

Hot Forming Analysis of Car Door Bar for Ultra High Strength Steel

2010 ◽  
Vol 160-162 ◽  
pp. 836-841
Author(s):  
Yun Kai Gao ◽  
Da Wei Gao ◽  
You Zhi Deng ◽  
Wei Cao
Keyword(s):  
High Strength Steel ◽  
Thickness Distribution ◽  
High Strength ◽  
Simulation Method ◽  
Hot Forming ◽  
Forming Limit ◽  
Boron Steel ◽  
Shell Elements ◽  
Forming Simulation ◽  
Ultra High Strength Steel

Ultra high strength steel plays an important role of light weighting in automotive industry. The hot forming simulation of car door bar is processed with 22MnB5 ultra high strength boron steel. FEM is built with the 12 nodes shell elements and MAT 106 is selected in LS-DYNA. The hot forming processes include two heat transfers. One is the process from the oven to the tools after the blank is heated. The other is the process after the blank contacts the tools. The hot forming simulation results are obtained by LS-DYNA. The results show that the thickness distribution, the forming limit and the maximum effective plastic strain and other performances attain to standards. It is proved that the hot forming simulation method is correct.

Effect of Heating Parameters on the Part’s Properties in Hot Stamping Process

2012 ◽  
Vol 557-559 ◽  
pp. 2417-2422
Author(s):  
Rui Ge ◽  
An Long ◽  
Yin Chen
Keyword(s):  
Hot Stamping ◽  
High Strength Steels ◽  
Dimensional Accuracy ◽  
High Strength ◽  
Hardness Measurement ◽  
Material Behavior ◽  
Hot Forming ◽  
Accuracy Test ◽  
Stamping Process ◽  
Proper Design

In the automotive industry, the hot forming of high strength steels offers the possibility to obtain significant reduction of weight without affecting the structural performances of final products. Compared with conventional sheet metal forming, the proper design of hot stamping process chain requires the deep knowledge of both interface phenomena and material behavior at high temperatures in order to obtain the desired properties of final products in terms of microstructure and strength characteristics. The work presented in this paper aims at accurately evaluate the effect of heating parameters on the properties of final sheet components produced in hot forming operations. Different from that in the lab, all the samples and parts used for the experimental test were produced in the production line, which can objectively show the manufacturing properties and microstructure character of products in mass. Microstructure evaluation, hardness measurement and dimensional accuracy test after hot stamping were performed and considered. The best heating parameters for the researched hot stamping B-Pillar’s production were obtained through the above research.

Influences of Variable Friction Coefficient on the Hot Formability of Ultra High Strength Steel Sheet

2010 ◽  
Vol 154-155 ◽  
pp. 1450-1455
Author(s):  
Hai Yan Yu ◽  
Li Bao ◽  
You Zhi Deng ◽  
Wei Cao
Keyword(s):  
Friction Coefficient ◽  
High Strength Steel ◽  
Steel Sheet ◽  
Coupling Effect ◽  
High Strength ◽  
Hot Forming ◽  
Forming Simulation ◽  
Ultra High Strength Steel ◽  
Variable Friction ◽  
The One

Friction coefficient is an important parameter in sheet metal forming especially in hot forming. Friction condition not only influences material flow but also affects the thermal conductivity between blank and tools. In this study, varied friction coefficient is introduced to the hot forming simulation of B-pillar made of ultra high strength steel sheet 22MnB5. Three curves of friction coefficient vs. temperature are investigated. All of the heat transferred by conductivity, radiation and convection are considered in the simulation. And the temperature-dependent material and process parameters are supplied. It is demonstrated that the coupling effect among the strength and hardness of the metals, the properties of the oxide film covering blank surface and viscosity of the lubrication oil leads to the fact that the friction coefficient changes with temperature instead of constant during hot forming. The friction coefficient curve characterized by increasing first then decreasing gives the best simulation results and then is followed by the one which is characterized by decreasing first then increasing. The constant friction coefficient is the last.

scholarly journals One-step Inverse Forming Simulation on Hot Forming Process of High-strength Food-can Tinplate

2016 ◽  
Vol 10 (1) ◽  
pp. 26-30
Author(s):  
Li Xiaoda ◽  
Zhang Xiangkui ◽  
Hu Ping ◽  
Liu Weijie ◽  
Zhan Xianghui
Keyword(s):  
High Strength ◽  
Hot Forming ◽  
Forming Process ◽  
Forming Simulation ◽  
One Step

Study on 22MnB5 Steel Microstructure in Hot Forming Progress

2012 ◽  
Vol 602-604 ◽  
pp. 1975-1979 ◽  
Author(s):  
Meng Chen ◽  
Da Sen Bi ◽  
Liang Chu ◽  
Xian Chen Gao ◽  
Pei Lin Li
Keyword(s):  
Vickers Hardness ◽  
Side Wall ◽  
High Strength Steels ◽  
High Strength ◽  
Martensite Phase ◽  
Experimental Results ◽  
Hot Forming ◽  
Forming Process ◽  
Steel Microstructure ◽  
22Mnb5 Steel

Hot forming is a method to make products with ultra high strength steels which typically used in automotive sector. 22MnB5 is one of the most typical hot forming steels. In this paper, hot forming process of 22MnB5 steel is simulated by thermo-mechanical coupled FE software Pam-stamp 2011. Through the simulation the temperature distribution and martensite phase fraction of hot forming part can be obtained. Besides, a hot forming experiment was set up. The tensile strength and Vickers hardness of hot samples which take from the hot formed part are measured. The experimental results indicate that the value of Vickers hardness in side wall is higher. The microstructure investigations have shown that the part after hot forming mostly fully martensitic microstructures. The result from simulation show good agreement with experimental results.

Sign in / Sign up

Export Citation Format

Share Document