Volkswagen Ag

Arcelormittal Investigacion Y Desarrollo, S.l.

Thyssenkrupp Steel Ag

Nanox Corporation

Audi Ag

Arcelormittal

Thyssenkrupp Steel Europe Ag

Universitat Kassel

Uwe Paar

Pascal Drillet

Stefan Sepeur

Raisa Grigorieva

Stefan Goedicke

Ludwig Schaller

Thomas Vietoris

Isabelle Thirion

Kurt Steinhoff

Karl Michael Bader

Michael Alsmann

Klaudia Bergmann

Manuel Maikranz-Valentin

A manufacturing process of a hot stamped coated part comprising the following successive steps, in this order: providing a hot rolled or cold rolled steel sheet comprising a steel substrate and an aluminium-silicon alloy precoating, the precoating containing more than 50% of free aluminium and having a thickness comprised between 15 and 50 micrometers, then cutting the steel sheet to obtain a precoated steel blank, then heating the blank under non protective atmosphere up to a temperature Tcomprised between T&#x2212;10&#xb0; C. and T, Te being the eutectic or solidus temperature of the precoating, then heating the blank from the temperature Tup to a temperature Tcomprised between 840 and 950&#xb0; C. under non protective atmosphere with a heating rate V comprised between 30&#xb0; C./s and 90&#xb0; C./s, V being the heating rate between the temperature Tand the temperature T, in order to obtain a coated heated blank, then soaking the coated heated blank at said temperature Tfor a time tcomprised between 20 s and 90 s, then hot stamping the blank in order to obtain a hot stamped coated part, then cooling said stamped part at a cooling rate in order to form a microstructure in the steel substrate comprising at least one constituent chosen among martensite or bainite.

Fabrication process of coated stamped parts

A composition for producing a protective coat against scaling on metallic surfaces. The composition includes, as binders, hydrolysates/condensates of at least one silane or a silicone resin binder and also, further, at least one metallic filler.

Method for coating metal surfaces

Growing community of inventors

Kassel, Germany

Uwe Paar