Salzgitter Flachstahl Gmbh

Volkswagen Ag

Zacharias Georgeou

Bianca Springub

Hellfried Eichholz

Georg Frommeyer

Manuel Otto

Thomas Evertz

Rune Schmidt-Jürgensen

Michael Braun

Peter Palzer

Frank Klose

Wilko Flügge

Matthias Höfemann

Daniela John

Alexander Redenius

Jürgen Kiese

Udo Brüx

Michael Spiegel

Wieland Walz

The invention relates to a steel strip for producing a non-oriented electrical steel. To achieve greatly improved frequency-independent magnetic properties, in particular greatly reduced hysteresis losses, in comparison with known electrical steels, the following alloy composition in wt % is proposed: C: &#x2264;0.03, Al: 1 to 12, Si: 0.3 to 3.5, Mn: &#x3e;0.25 to 10, Cu: &#x3e;0.05 to 3.0, Ni: &#x3e;0.01 to 5.0, total of N, S and P: at most 0.07, remainder iron and smelting-related impurities, with the optional addition of one or more elements from the group Cr, Mo, Zn and Sn, wherein the steel strip has an insulation layer substantially consisting of Al2O3 and/or SiO2 with a thickness in the range from 10 &#x3bc;m to 100 &#x3bc;m. The invention also relates to a method for producing such a steel strip.

Steel strip for producing a non-grain-oriented electrical steel, and method for producing such a steel strip

A method is disclosed for calculating the combination of properties of phase components and of mechanical properties being established of a predefined alloy composition for a deformable lightweight steel having the elements in percent by weight C 0.02 to &#x2264;1.0, Al 2.5 to &#x2264;8.0, Si 0.0 to &#x2264;1.5, Mn &#x2265;5.0 to &#x2264;35.0, Cr &#x3e;1.0 to &#x2264;14.0, total content of N, S, P &#x2264;0.1, the remainder iron and other steel-accompanying elements with some contents of Cu, Mo, Ni, and Zn of up to 1.0 wt % in total by using specific formulas on the basis of the manganese content, wherein, in the formulas, the alloy contents are used as absolute numbers without dimensions, and the calculated, dimensionless values are assigned the units MPa for Rm and Rp and % for A80.

Method for calculating the combination of properties being established for a deformable lightweight steel

An energy-storing container is made of a lightweight steel having the following chemical composition (in wt %): C 0.04-2%; Mn 14-30%; Al 1.5-12%; Si 0.3-3%; Cr 0.12-6%, and additionally one or more of the following elements: Ti, V, Nb, B, Zr, Mo, Ni, Cu, W, Co, P, N, each at up to 5% and in total at up to 10%, wherein the remainder is Fe including common steel tramp elements, wherein the concrete alloy composition is selected in order to limit the &#x3b1;'-martensite fraction before or after a forming process to no more than 3%, with the stipulation that the &#x3b1;&#x2032;-martensite equivalent according to 0.1*wt % Mn+wt % C+0.05*wt % Si is between 3.4 and 10.5.

Method for producing an energy-storing container made of lightweight steel

A method is disclosed for producing components from an austenitic lightweight steel which is metastable in its initial state, by forming of a sheet, a circuit board or a pipe in one or more steps, exhibiting a temperature-dependent TRIP and/or TWIP effect during forming. To obtain a component with, in particular, high toughness, the forming is carried out at a temperature above room temperature, at 40 to 160&#xb0; C., which avoids the TRIP/TWIP effect, and to achieve in particular high component strength, the forming is carried out at a temperature below room temperature, at &#x2212;65 to 0&#xb0; C., which enhances the TRIP/TWIP effect.

Method for producing components from lightweight steel

A welding additive for electric arc welding and laser beam welding of mixed joins composed of austenitic and high-manganese-containing and ferritic steel, where the high-manganese-containing steel has a manganese content of at least 7-30% by weight includes the following alloy elements in % by weight: C 0.04-1.0; Mn 7-30; Si&#x2266;6; Al&#x2266;4; Mo&#x2266;2; Ti&#x2266;0.5; Zr 0.01-01; B 0.001-0.01; P&#x3c;0.005; S&#x3c;0.002; N&#x3c;0.008; balance iron and unavoidable steel accompanying elements.

Welding additive for electric arc welding and laser beam welding of mixed joins made of austenitic and ferritic steel

A method for producing a workpiece having properties which are adjustable across a wall thickness or strip thickness of the workpiece, includes the steps of subjecting the workpiece to a decarburizing annealing treatment under an oxidizing atmosphere and to an accelerated cooling and/or a cold forming for generating a property gradient of the workpiece, wherein the workpiece is made of an austenitic lightweight steel which has an alloy composition which includes by weight percent 0.2% to 1% carbon, 0.05% to&#x3c;15% aluminum, 0.05% to 6.0% silicon, 9% to&#x3c;30% manganese, and at least one element selected from the group consisting of chromium, copper, boron, titanium, zirconium, vanadium and niobium, wherein chromium=4.0%; titanium+zirconium=0.7%; niobium+vanadium=0.5%, boron=1%, the remainder iron including common steel companion elements.

Method for producing workpieces from lightweight steel having material properties that are adjustable across the wall thickness

A method for producing a cast strip from steel with properties that can be adjusted across a cross section and a length of the strip, includes applying a coating mass including a carrier liquid with additives contained therein to a side of a rotating cast band of a horizontal strip cast system, drying the coating mass for removing liquid components of the coating mass, applying a steel melt to the side of the rotating cast band via a melt container, wherein the dried coating mass is materially united with the applied steel melt; and allowing the steel melt to solidifiy to a pre-strip.

Growing community of inventors

Wolfsburg, Germany

Zacharias Georgeou