Thyssen Krupp Ag

Thyssenkrupp Steel Europe Ag

Max-planck-institut Fur Eisenforschung Gmbh

Matthias Schirmer

Harald Hofmann

Christian Höckling

Dorothée Dorner

Martin Kibben

Erik Hilfrich

Jens-Ulrik Becker

Daniel Nierhoff

Markus Daamen

Andreas Keutz

Jia-Uei Chan

Evgeny Balichev

Jonas Schwabe

Alexander Zimmermann

Hans Ferkel

Melanie Borucki

Oliver Rott

Michael Gövert

Magnus Miller

Martin Palm

Ingo Thomas

Sinasi Goeklue

Christian Hoeckling

Annette BÄUMER

Jonas Karl Moritz Schwabe

Andreas Triebels

Dirk Ponge

The present invention relates to a battery housing for an electrically powered vehicle, in particular a motor vehicle, comprising a battery accommodation space made of a first flat steel product and a housing frame made of a second flat steel product, where the two flat steel products differ in terms of at least one of the properties yield strength (R), tensile strength (R) or elongation (A).

Battery housing

A method is provided for producing a 0.8-4.5 mm thick steel strip with an amorphous, partially amorphous or fine-crystalline microstructure with grain sizes in the range of 10-10000 nm and also a flat steel product made therefrom. A molten steel is cast into a cast strip in a casting device and cooled down at an accelerated rate. Along with Fe and impurities that are unavoidable for production-related reasons, the molten material contains at least two elements belonging to the group 'Si, B, C and P'. In this case, the following applies for the contents of these elements (in % by weight) Si: 1.2-7.0%, B: 0.4-4.0%, C: 0.5-4.0%, P: 1.5-8.0%. With a corresponding composition and a microstructure with corresponding characteristics, a flat steel product according to the invention has a HV0.5 hardness of 760-900.

Method for producing a flat steel product with an amorphous, partially amorphous or fine-crystalline microstructure and flat steel product with such characteristics

A frame unit for a two-wheeled vehicle may comprise a main frame. The main frame may be formed by a first partial shell and a second partial shell that is joined to the first partial shell. The first partial shell and the second partial shell may be produced from a material comprising steel. The main frame may further comprise an upper tube, a lower tube, a seat tube, and/or a head tube. A rear section may be joined to the main frame and may include a chain stay and/or a seat stay. Further, each of the first and second partial shells may form a lateral half of the main frame, and the first and second partial shells may have a C-shaped cross section. The frame unit avoids the disadvantages of the prior art and offers a high degree of design freedom.

Shell-type frame unit, method for producing a frame unit, and use of a frame unit

A cold-rolled flat steel product for deep drawing applications is disclosed, composed of a steel which, in addition to Fe and unavoidable impurities (in % by weight) contains C: &#x3c;0.1%, Al: 6.5-11%, REM: 0.02-0.2%, P: &#x3c;0.1%, S: &#x3c;0.03%, N: &#x3c;0.1% and optionally one or more elements from the group of 'Mn, Si, Nb, Ti, Mo, Cr, Zr, V, W, Co, Ni, B, Cu, Ca, N', provided that Mn: &#x3c;6%, Si: &#x3c;1%, Nb: &#x3c;0.3%, Ti: &#x3c;0.3%, Zr: &#x3c;1%, V: &#x3c;1%, V: &#x3c;1%, Mo: &#x3c;1%, Cr: &#x3c;3%, Co: &#x3c;1%, Ni: &#x3c;2%, B: &#x3c;0.1%, Cu: &#x3c;3%, Ca: &#x3c;0.015%. For production of such a flat steel product, a steel of appropriate composition is cast to give a pre-product, which is then hot-rolled to hot strip at a hot rolling end temperature of 820-1000&#xb0; C. The latter is subsequently wound at a winding temperature of up to 850&#xb0; C., after winding annealed at an annealing temperature of &#x3e;650-1200&#xb0; C. for 1-50 h, then cold-rolled in one or more stages with a total cold rolling level of &#x2265;30% to give the cold-rolled flat steel product and finally annealed at 650-850&#xb0; C.

Cold-rolled flat steel product for deep drawing applications and method for production thereof

Growing community of inventors

Dusseldorf, Germany

Matthias Schirmer