Measurement of Coefficient of Friction in Hot Stamping by Hot Deep Drawing Test

Hironori Sasaki; Tomonori Mukai; Akira Yanagida

doi:10.4028/www.scientific.net/KEM.716.184

Paper Titles

Evaluation of Tribological Performance of Lubricants and Nitrided Die for Hot Forming of Steel Using Tapered-Plug Penetration Test
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Extended Conical Tube-Upsetting Test to Investigate the Evolution of Friction Conditions
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Identification of Friction Coefficient in Forging Processes by Means T-Shape Tests in High Temperature
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Investigation on Friction Conditions during a Severe Bending Deformation on a Thick Plate
p.176

Measurement of Coefficient of Friction in Hot Stamping by Hot Deep Drawing Test
p.184

Relationship between Molecular Structures of Organic-Sulfur Compounds and Metal Forming Performance
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Effect of Microstructure and Mechanical Properties Formation of Medium Carbon Steel Wire through Continuous Combined Deformation
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Influence of Servo Motion on Forming Limit of Thin Metallic Foils Using Micro Bulge Test
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Influence of Strain Gradient on Springback of Thin Pure Titanium Foils in Microbending Assisted by Resistance Heating
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 716Measurement of Coefficient of Friction in Hot...

Measurement of Coefficient of Friction in Hot Stamping by Hot Deep Drawing Test

Abstract:

Hot stamping process has been developed to produce the steel automobile parts with an ultra-high-strength of 1500 MPa. The effect of scale thickness on the formability in hot stamping was investigated by a hot deep drawing test in our previous research. The draw-in lengths of flange increased with decreasing the scale thickness. It is supposed that thin scale thickness resulted in low coefficient of friction at the flange area. The other reason is the temperature of wall zone would become low according to decreasing the scale thickness or increasing of the thermal transfer coefficient and it slightly inhibits local deformation at the wall area. It is difficult to separate these phenomena. To quantify the effect of scale thickness on the friction at the flange area during hot deep drawing, the coefficient of friction was directly measured. The coefficient of friction decreases with decreasing scale thickness.

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Periodical:

Key Engineering Materials (Volume 716)

Pages:

184-189

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.716.184

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Online since:

October 2016

Authors:

Hironori Sasaki*, Tomonori Mukai, Akira Yanagida

Keywords:

Boron Alloyed Steel, Coefficient of Friction, Deep Drawing, Hot Stamping, Oxide Scale

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