Springback-free mechanism in hot stamping of ultra-high-strength steel parts and deformation behaviour and quenchability for thin sheet

2017 ◽  
Vol 95 (1-4) ◽  
pp. 459-467 ◽  
Author(s):  
Yuki Nakagawa ◽  
Ken-ichiro Mori ◽  
Tomoyoshi Maeno
Keyword(s):  
High Strength Steel ◽  
Deformation Behaviour ◽  
Hot Stamping ◽  
Thin Sheet ◽  
High Strength ◽  
Ultra High Strength Steel

Quenchability improvement and control simplification by ice mandrel in hot stamping of ultra-high strength steel hollow parts

2021 ◽  
Vol 64 ◽  
pp. 916-926
Author(s):  
Ali Talebi-Anaraki ◽  
Tomoyoshi Maeno ◽  
Ryohei Ikeda ◽  
Kazui Morishita ◽  
Ken-ichiro Mori
Keyword(s):  
High Strength Steel ◽  
Hot Stamping ◽  
High Strength ◽  
Ultra High Strength Steel ◽  
And Control

scholarly journals Improvement of formability using partial cooling during transfer in hot stamping of ultra-high strength steel parts

2018 ◽  
Vol 15 ◽  
pp. 1119-1126 ◽  
Author(s):  
Yasutaka Suzuki ◽  
Ken-ichiro Mori ◽  
Tomoyoshi Maeno ◽  
Kazuki Sakakibara ◽  
Yohei Abe
Keyword(s):  
High Strength Steel ◽  
Hot Stamping ◽  
High Strength ◽  
Ultra High Strength Steel

Ultra-High Strength Steel Hot Stamping Technology and Devices

2014 ◽  
Vol 1063 ◽  
pp. 237-243
Author(s):  
Zhong De Shan ◽  
Qin Tai Yan ◽  
Chao Jiang ◽  
Wen Juan Rong
Keyword(s):  
Tensile Strength ◽  
High Strength Steel ◽  
Hot Stamping ◽  
Research Work ◽  
High Strength ◽  
Parameters Optimization ◽  
Systematic Research ◽  
China Academy ◽  
Ultra High Strength Steel ◽  
Vehicle Structure

Ultra High Strength Steel (UHSS) hot stamping technology is a special process which can enhance the steel tensile strength to 1500MPa. Appling this technology in producing vehicle structure parts can make car lighter and safer. In China there are more and more automobile enterprises adopt this technology. To master and extend the skill, China Academy of Machinery Science & Technology (CAM) have done systematic research, such as the strengthen mechanism of the steel, hot stamping key devices designing, forming and quenching integrated mould designing, stamping process parameters optimization, etc.. By now, CAM has mastered the mass production technology of vehicle parts, which can guarantee its shape and tensile strength, and produced such typical parts as door-beam, B pillar, etc.. The paper is an introduction of the research work and achievement about UHSS hot stamping developed by CAM.

Hybrid quenching method of hot stamping for automotive tubular beams

2015 ◽  
Vol 231 (9) ◽  
pp. 1599-1610 ◽  
Author(s):  
Jong-Kyu Park ◽  
Yang-Su Kim ◽  
Chang Hee Suh ◽  
Young-Suk Kim
Keyword(s):  
High Strength Steel ◽  
Hot Stamping ◽  
High Strength ◽  
Torsion Beam ◽  
Stamping Process ◽  
Die Quenching ◽  
Ultra High Strength Steel ◽  
Quenching Method ◽  
Torsion Beam Axle ◽  
Beam Axle

Recently, tubular-type coupled torsion beam axle, which is a component of the automotive rear suspension systems, has been developed by using ultra-high strength steel. It is manufactured by hot stamping process to enhance the strength and reduce springback. The hot stamping process is classified as a direct method and an indirect method according to forming sequence and quenching method, so-called die quenching or water quenching. Each of these methods has limitations in the aspect of dimensional accuracy and strength. Hybrid quenching is a new quenching method which sprays water to the tube directly in addition to die quenching. In this study, direct hot stamping with hybrid quenching was applied to produce an automotive tubular coupled torsion beam axle of ultra-high strength steel. This study proposes a simulation method of hybrid quenching for tubular beam and the hybrid quenching method was evaluated experimentally. Finally, the proposed hybrid quenching method has been found very effective in reducing the cooling time and thermal deformation.

GPU Accelerated Finite Element Simulation for Ultra-High Strength Steel Quenching

2013 ◽  
Vol 842 ◽  
pp. 337-340
Author(s):  
Chao Wang ◽  
Bin Zhu ◽  
Liang Wang ◽  
Yi Lin Wang ◽  
Yi Sheng Zhang
Keyword(s):  
Finite Element ◽  
Latent Heat ◽  
High Strength Steel ◽  
Thermal Contact ◽  
Hot Stamping ◽  
High Strength ◽  
Heat Processing ◽  
Processing Unit ◽  
Ultra High Strength Steel ◽  
Quenching Process

During the hot stamping of ultra-high strength steel (UHSS), the quenching effect of the mold on the sheet plays an important role to achieve the transition from austenite to martensite. Thus a finite element model for the quenching process of UHSS is established in this paper. The key points of the model include contact thermal conduction and the latent heat processing of phase transforming. Finite element program has been developed to calculate the temperature field of the UHSS quenching process, and temperature measurement device was used to get the temperature-time curve of the mold and the sheet to validate the calculation results. It can be concluded that the latent heat and thermal contact resistance have a critical influence on the temperature filed of the sheet during the hot stamping process. Finally, the parallel computation technology based on GPU(Graphics processing unit) was adopted to accelerate the calculation.

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