Abstract:
The invention relates to a method for joining of at least two materials, non-weldable directly to each other with thermal joining processes in a lap joint configuration, where a two step sequence is used consisting of a first step to apply a thermomechanical or mechanical surface protection layer on the surface of a (stainless) steel substrate (1) and a second step where, a thermal joining process is used to weld the sprayed layer (2) with an applied aluminum sheet (3) without having brittle intermetallic phases in the whole material configuration.
Abstract:
The invention relates for a method for partial hardening of an austenitic steel by utilizing during cold deformation the TWIP (Twinning Induced Plasticity), TWIP/TRIP or TRIP (Transformation Induced Plasticity) hardening effect. Cold deformation is carried out by cold rolling on at least one surface (2,3;12) of the material (1,11) to be deformed with forming degree (Φ) at the range of 5 ≤ Φ ≤ 60 % in order to achieve in the material (1,11) at least two consecutive areas (5,7;14,16) with different mechanical values in thickness, yield strength Rp0.2, tensile strength Rm and elongation having a ratio (r) between ultimate load ratio ΔF and the thickness ratio Δt at the range of 1.0 > r > 2.0, and which areas are mechanically achieved to connect to each other by a transition area (6;15) which thickness is achieved variable from the thickness (t1,t3) of the first area (5,14) in the deformation direction (4,13) to the thickness (t2,t4) of the second area (7,16) in the deformation direction (4,13). The invention also relates to the use of the cold deformed product.
Abstract:
The invention relates to a method for manufacturing a component with high work hardening rate made of a material having austenitic microstructure. A cold work hardened material for a component (1) is heat treated to create at least one softened area (2) with high ductility and lower strength than the initial high strength material by heat treating a part of the component material required for the softened area (2). The invention also relates to a use of the component.
Abstract:
The present invention relates to a motor vehicle crash box with a working direction in vehicle's longitudinal axis manufactured out of a tube which is expanded into different zones (1,2, 3, 4) different in strength and diameter by using steel which has even after forming a homogenous austenitic microstructure with a strain hardening effect. The present invention further relates to the manufacturing method of such a component.
Abstract:
Method for joining of at least two unweldable materials, non-weldable directly to each other with thermal joining processes in a lap joint configuration, where a two step sequence is used consisting of a first step to apply a thermomechanical or mechanical surface protection layer on the surface of an unweldable material and a second step, where a thermal joining process is used to joint the sprayed layer with an applied layer sheet.
Abstract:
The invention relates to a method for manufacturing a welded component, where at least one material piece is positioned between metal pieces to be welded together. At least one protrusion (5, 13, 23, 33, 43) is achieved to at least one of the metal pieces (3, 4; 11, 12; 21, 22; 31, 32; 41, 42) to be welded together, and at least one opening (2, 14, 24, 34, 44) is achieved to at least one material piece (1, 15, 25, 35, 45) which is positioned between the metal pieces (3, 4; 11, 12; 21, 22; 31, 32; 41, 42) to be welded and isolated (16, 17; 26; 36) from the metal pieces to be welded. At least one part of the protrusion (5, 13, 23, 33, 43) in one of those metal pieces to be welded together is taken through the opening (2, 14, 24, 34, 44) in order to have mechanical contact through the upper end of the protrusion (5, 13, 23, 33, 43) with the second metal piece to be welded. Welding (37, 38, 39) of the metal pieces together is carried out by focusing the weld effect to the surface of the second metal piece which is in connection with the protrusion to the first metal piece to be welded. The invention also relates to the use of the component.
Abstract:
The invention relates to a supporting housing for a battery compartment of electric drive vehicles by using flat metallic sheets as deep-drawn shells which are fitted into each other whereby at least one double-floor is created into which a passive and partly integrated thermal management system for cooling and heating is integrated. The invention also relates to the integration of further functionality-elements like sensors for status measurement are integrated into the "double-floor" and connected with the battery management system.
Abstract:
The invention relates to a method for manufacturing a component made of austenitic manganese alloyed steel using the TWIP effect. The component (1) is deformed so that the component (1) has an essentially same thickness at the 5 range of 0,5 – 2 millimeter in each region (A, B, C, D) of the component (1), but the component (1) has at least two regions having different mechanical property values.
Abstract:
The invention relates to a method for manufacturing a sandwich panel as a semi-finished product where at least one layer (2, 12) of a non-metallic material is positioned between at least two metallic layers (1, 3; 11, 13). At least one of the metal layers (1, 3; 11, 13) is shaped into a three dimensional layer (3, 13), and the metal layers (1, 3; 11, 13) are achieved to be in directly mechanical contact to enable resistance weldability of the semi-finished product in order to connect the semi-finished product to a desired combination of solutions in a subsequent manufacturing process.
Abstract:
The invention relates to a steel for manufacturing a component by hot forming after austenization. The steel consists of 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 further 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 occupying in stainless steels. The invention also relates to the steel in transportation parts of vehicles and in pressure vessels or tubes.