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 Wear in Hot Stamping by Partition Heating

2020 ◽  
Vol 4 (1) ◽  
pp. 18 ◽  
Author(s):  
Yanhong Mu ◽  
Enrico Simonetto ◽  
Marco Scagnolari ◽  
Andrea Ghiotti
Keyword(s):  
Mechanical Characteristics ◽  
Adhesive Wear ◽  
Heating Temperature ◽  
Hot Stamping ◽  
Boron Steel ◽  
Steel Sheets ◽  
Body In White ◽  
Higher Temperature ◽  
Lower Temperature ◽  
Pin On Disk

Hot stamping by partition heating of Al–Si coated boron steel sheets is currently utilized to produce parts of the car body-in-white with tailored microstructural and mechanical characteristics. This paper investigates the evolution of the Al–Si coating and its tribological and wear performances in the case of direct heating at the process temperatures of 700 °C, 800 °C, and 900 °C, skipping the preliminary austenitization as it may happen in the case of tailored tempered parts production. A specifically designed pin-on-disk configuration was used to reproduce at a laboratory scale the process thermo-mechanical cycle. The results show the morphological and chemical variation of the Al–Si coating with heating temperature, as well as that the friction coefficient, decreases with increased temperature. Furthermore, the results proved that the adhesive wear is the main mechanism at the lower temperature, while abrasive wear plays the major role at the higher temperature.

EXPERIMENTAL EVALUATION OF CO2 LASER CUTTING QUALITY OF UHSS USING OXYGEN AS AN ASSISTED GAS

2016 ◽  
Vol 78 (7) ◽  
Author(s):  
Abdul Fattah Mohamad Tahir ◽  
Ahmad Razelan Rashid
Keyword(s):  
Co2 Laser ◽  
High Strength Steel ◽  
Laser Power ◽  
Laser Cutting ◽  
Cutting Speed ◽  
High Strength ◽  
Gas Pressure ◽  
Kerf Width ◽  
Boron Steel ◽  
Major Factors

Development of new material known as Ultra High Strength Steel (UHSS) able to improve the vehicle mass thus reflecting better fuel consumption. Transformation into high strength steel has been a significant drawback in trimming the UHSS into its final shape thus laser cutting process appeared to be the solution. This study emphasizes the relationship between Carbon Dioxide (CO2) laser cutting input parameters on 22MnB5 boron steel focusing on the kerf width formation and Heat Affected Zone (HAZ). Experimental research with variation of laser power, cutting speed and assisted gas pressure were executed to evaluate the responses. Metrological and metallographic evaluation of the responses were made on the outputs that are the kerf width formation and HAZ.  Positive correlation for power and negative interaction for cutting speed were found as the major factors on formation of the kerf. For the HAZ formation, thicker HAZ were formed as bigger laser power were applied to the material. Cutting speed and gas pressure does not greatly influence the HAZ formation for 22MnB5 boron steel.

Hot stamping of boron steel sheets with tailored properties: A review

2016 ◽  
Vol 228 ◽  
pp. 11-24 ◽  
Author(s):  
Marion Merklein ◽  
Michael Wieland ◽  
Michael Lechner ◽  
Stefania Bruschi ◽  
Andrea Ghiotti
Keyword(s):  
Hot Stamping ◽  
Boron Steel ◽  
Steel Sheets

Investigation on Influence Factors of Bulging of Boren Steel at Elevated Temperature

2009 ◽  
Vol 628-629 ◽  
pp. 563-568
Author(s):  
Jun Ying Min ◽  
Jian Ping Lin ◽  
Guo Hua Sun ◽  
Wen Hua Bao
Keyword(s):  
Finite Element ◽  
Elevated Temperature ◽  
Finite Element Model ◽  
Minimum Temperature ◽  
Hot Stamping ◽  
Influence Factors ◽  
Element Model ◽  
Boron Steel ◽  
Steel Sheets ◽  
The Finite Element Model

The finite element model of bulging at elevated temperature was established by using of pam-stamp 2007. The bulging tests of boron steel sheets were also performed on the self-designed and manufactured tool system. The simulated results of bulging height, limit strain and the minimum temperature of specimens are consistent with that of tests. It demonstrates the validity and accuracy of the finite element model established in pam-stamp. The influences of the friction coefficient, the temperature and the stamping velocity on the hot bulging are analyzed numerically. The friction condition should be improved and the minimum temperature gradient is recommended in practical hot stamping production.

Comparison of tribological and wear performances of AlSi and Zn coatings in hot stamping of boron steel sheets

Wear ◽  
2015 ◽  
Vol 332-333 ◽  
pp. 810-821 ◽  
Author(s):  
A. Ghiotti ◽  
S. Bruschi ◽  
F. Medea
Keyword(s):  
Hot Stamping ◽  
Boron Steel ◽  
Steel Sheets

A novel approach to wear testing in hot stamping of high strength boron steel sheets

Wear ◽  
2013 ◽  
Vol 302 (1-2) ◽  
pp. 1319-1326 ◽  
Author(s):  
A. Ghiotti ◽  
F. Sgarabotto ◽  
S. Bruschi
Keyword(s):  
Hot Stamping ◽  
High Strength ◽  
Wear Testing ◽  
Boron Steel ◽  
Steel Sheets ◽  
Novel Approach

scholarly journals Steel sheets partnered with quenchable sheet in hot stamping of tailor-welded blanks and its application to separation prevention of fractured components

2020 ◽  
Vol 111 (3-4) ◽  
pp. 725-734
Author(s):  
Ken-ichiro Mori ◽  
Yasutaka Suzuki ◽  
Daisuke Yokoo ◽  
Michiya Nishikata ◽  
Yohei Abe
Keyword(s):  
Mechanical Properties ◽  
Phase Transformation ◽  
Mild Steel ◽  
Hot Stamping ◽  
High Strength ◽  
Boron Steel ◽  
Air Cooling ◽  
High Ductility ◽  
Steel Sheets ◽  
Tailor Welded Blanks

Abstract The phase transformation and mechanical properties of non-quenchable steels partnered with the quenchable boron steel in hot stamping of tailor-welded blanks were evaluated to produce tailored components with partially balanced strength and ductility. The effect of the forming start temperature after natural air cooling on the phase transformation and mechanical properties for 270 MPa mild steel, non-quenchable steel, 440 MPa high strength steel, and 22MnB5 steel sheets was examined, and the 270 MPa and non-quenchable sheets had enough ductility after hot stamping. Tailored components having a hardness of about 500 HV1 in the high strength zone and a total elongation of about 30% in the high ductility zone were hot-stamped from a tailor-welded blank composed of 22MnB5 and 270 MPa sheets. It was found that the 270 MPa mild steel sheet is sufficient as a partner sheet of tailor-welded blanks. In addition, the safety of hot-stamped components was heightened by welding a 22MnB5 main blank with a 270 MPa steel patch. Even if the main blank is fractured by a collision, the hot-stamped component is not separated by the 270 MPa patch having high ductility.

Heat Transfer in Hot Stamping of High-Strength Boron Steel Sheets

2014 ◽  
Vol 45 (4) ◽  
pp. 1192-1195 ◽  
Author(s):  
Zhiqiang Zhang ◽  
Xianshuang Li ◽  
Yong Zhao ◽  
Xiangji Li
Keyword(s):  
Heat Transfer ◽  
Hot Stamping ◽  
High Strength ◽  
Boron Steel ◽  
Steel Sheets
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