Outokumpu Oyj

Outokumpu Nirosta Gmbh

Jasminko Skrlec

Stefan Lindner

Thomas Fröhlich

Seyed Amin Mousavi Rizi

Jochen Krautschick

Thomas Nentwig

Gabriele Brückner

Marcel Hartig

A steel for manufacturing a component by hot forming after austenization includes in weight % less than or equal to 0.2%, carbon (C), less than or equal to 3.5% silicon (Si), 1.5-16.0% manganese (Mn), 8.0-14.0% chromium (Cr), less than or equal to 6.0% nickel (Ni), less than or equal to 1.0% nitrogen (N), less than or equal to 1.2% niobium (Nb) linked to the formula Nb=4x(C+N), less than or equal to 1.2% titanium (Ti) so that Ti=4x(C+N)+0.15, and optionally less than or equal to 2.0% molybdenum (Mo), less than or equal to 0.15% vanadium (V), less than or equal to 2.0% copper (Cu), less than 0.2% aluminum (Al), less than or equal to 0.05% boron (B), the rest being iron and evitable impurities.

Steel for manufacturing a component by hot forming and use of the component

A component made of metallic composite material having high corrosion resistance and scale resistance. The metallic composite material contains as a core material an uncoated hardenable steel on which surface a corrosion resistance and scaling resistance layer is provided using heat resistant stainless steel, and has a yield strength Rpof at least 1000 MPa and a tensile strength Rof at least 1500 MPa for the core material and a critical scaling resistance temperature in air for the layer material is at least 850&#xb0; C.

Component made of metallic composite material and method for the manufacture of the component by hot forming

The invention relates to a method of welding of at least two metal-based materials (), non-weldable directly to each other with resistance welding. At least one spacer () is joined by welding on at least one of the two surfaces of a material () in every interstice between two surfaces of materials to be welded. The welded spacer () is utilized so that resistance welding is focused to the surface of the material () with the spacer () to melt at least one spacer () located on the heat affecting zone in order to achieve a weld between the metal-based materials ().

Method for welding metal-based materials

The invention relates to a method for producing an ultra high strength material with high elongation by work hardening an essentially nickel-free austenitic material and then subjecting the material to heat treatment in the temperature range between 200&#xb0; C. and &#x3c;1,100&#xb0; C. within a period from 10 s to 10 minutes.

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Duisburg, Germany

Jasminko Skrlec