Microstructure and properties of hot stamping boron steel using heated dies under different holding time

Vacuum ◽  
2019 ◽  
Vol 170 ◽  
pp. 108960
Author(s):  
Chenchen Li ◽  
Silu Xie
Keyword(s):  
Hot Stamping ◽  
Holding Time ◽  
Boron Steel ◽  
Microstructure And Properties

Influence of Annealing Temperature on Microstructure and Properties of the Hot-Stamping Boron Steel

2012 ◽  
Vol 602-604 ◽  
pp. 385-389
Author(s):  
Kuan Hui Hu ◽  
Xiang Dong Liu ◽  
De Xin Tian ◽  
Guan Wen Feng ◽  
Fang Yi Sun
Keyword(s):  
Yield Strength ◽  
Annealing Temperature ◽  
Hot Stamping ◽  
Phase Region ◽  
Boron Steel ◽  
Two Phase ◽  
Microstructure And Properties ◽  
Significant Downward Trend ◽  
Test Steel ◽  
Higher Temperature

The effect of different annealing temperature on microstructure and properties of the hot-stamping boron steel were studied.The results show that the yield strength of the test steel is reduced with increasing annealing temperature, only at 790°C,the specimen yield strength increased slightly, and showed a significant downward trend after 790°C.The specimen tensile strength and hardness with the change of the same trend when annealing temperature changes.And through the test we can see,at 760°C ,the test steel has entered a two-phase region,the test steel gain ferrite and pearlite when it is annealed below the temperature,it is easy to appear martensite microstructure when it is annealed in the higher temperature,and lead to the strength and hardness of the rise.

Experimental Platforms and Finite Element Analysis on Hot Stamping Processes

2014 ◽  
Vol 1063 ◽  
pp. 334-338 ◽  
Author(s):  
Tzu Hao Hung ◽  
Heng Kuang Tsai ◽  
Fuh Kuo Chen ◽  
Ping Kun Lee
Keyword(s):  
Heat Transfer ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Process Design ◽  
Hot Stamping ◽  
Boron Steel ◽  
Transfer Coefficients ◽  
Element Analysis ◽  
Heat Transfer Coefficients ◽  
The Finite Element Analysis

Due to the complexity of hot stamping mechanism, including the coupling of material formability, thermal interaction and metallurgical microstructure, it makes the process design more difficult even with the aid of the finite element analysis. In the present study, the experimental platforms were developed to measure and derive the friction and heat transfer coefficients, respectively. The experiments at various elevated temperatures and contact pressures were conducted and the friction coefficients and heat transfer coefficients were obtained. A finite element model was also established with the experimental data and the material properties of the boron steel calculated from the JMatPro software. The finite element simulations for the hot stamping forming of an automotive door beam, including transportation analysis, hot forming analysis and die quenching analysis were then performed to examine the forming properties of the door beam. The validation of the finite element results by the production part confirms the efficiency and accuracy of the developed experimental platforms and the finite element analysis for the process design of hot stamping.

Hot Stamping Processing Experiments of Quenchable Boron Steel

2008 ◽  
Vol 575-578 ◽  
pp. 299-304 ◽  
Author(s):  
Jun Bao ◽  
Zhong Wen Xing ◽  
Yu Ying Yang
Keyword(s):  
Heating Temperature ◽  
Hot Stamping ◽  
Cooling Water ◽  
High Strength ◽  
Processing Parameters ◽  
Boron Steel ◽  
Complicated Shape ◽  
Water Flow Velocity ◽  
Ultra High Strength Steel ◽  
Automotive Parts

The quenchable boron steel is a novel type of ultra high strength steel used for automotive parts so as to reduce the weight of the whole automobile. The hot stamping processing experiments for bending parts were studied. The influence of the hot stamping processing parameters, such as the heating temperature, the heat holding time and the cooling water flow velocity, on the mechanics properties and microstructure of the hot stamping parts is obtained. And then the optimal ranges of these parameters are determined, which provides a basis for the control of the hot stamping process applied in complicated shape parts’ production.

scholarly journals CO2 Laser Cutting of Hot Stamping Boron Steel Sheets

Metals ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 456 ◽  
Author(s):  
Pasquale Russo Spena
Keyword(s):  
Co2 Laser ◽  
Laser Cutting ◽  
Hot Stamping ◽  
Boron Steel ◽  
Steel Sheets

scholarly journals Numerical modeling and experimental verification of ductile damage in boron steel hot stamping process

2017 ◽  
Vol 207 ◽  
pp. 675-680
Author(s):  
Bingtao Tang ◽  
Chenchen Li ◽  
Guangchun Xiao ◽  
Wei Zhao ◽  
Huiping Li
Keyword(s):  
Numerical Modeling ◽  
Experimental Verification ◽  
Hot Stamping ◽  
Ductile Damage ◽  
Boron Steel ◽  
Stamping Process

Numerical Simulation and Optimization of Cooling Ducts Layout in Hot Stamping Die

2012 ◽  
Vol 184-185 ◽  
pp. 333-336 ◽  
Author(s):  
Hui Xie ◽  
Ya Ke Chen
Keyword(s):  
Heat Transfer ◽  
Hot Stamping ◽  
Cooling Water ◽  
High Strength ◽  
Bulk Flow ◽  
Boron Steel ◽  
Press Hardening ◽  
Simulation And Optimization ◽  
Stamping Die ◽  
Cooling Ducts

Abstract. As an innovative process of manufacturing ultra high strength steel (UHSS), hot stamping or press hardening is a multi-physical coupling process with complex changes in thermal, mechanical and phase transformation. In this work, in order to study heat transfer from workpiece to upper & lower die and cooling water, a new approach, named Bulk Flow, is adopted to model the cooling ducts and to simulate heat transfer in hot stamping die. Not only can tool design, cooling duct layout and process parameters be studied and optimized to increase the cooling rate and to homogenize temperature distribution in workpiece, but also, the precision of hot stamping simulation be improved. The experimental results of boron steel components formed by the designed die show that the martensite is homogenous. It indicates the feasibility of the bulk flow method．

scholarly journals Effect of Holding Time During Sintering on Microstructure and Properties of 3D Printed Alumina Ceramics

2020 ◽  
Vol 7 ◽  
Author(s):  
Yu Pan ◽  
He Li ◽  
Yongsheng Liu ◽  
Yansong Liu ◽  
Kehui Hu ◽  
...  
Keyword(s):  
Holding Time ◽  
Alumina Ceramics ◽  
Microstructure And Properties ◽  
3D Printed
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