Abstract: A tubular element for a gas pressure container of an airbag system of a motor vehicle, wherein the tubular element (10) consists of a material which, in addition to iron and impurities due to melting, comprises the following alloying elements in the ranges indicated in percent by weight: C ?0.05-0.2% Si ??0.9% Mn ?0.2-2.0% Cr ?0.05-2% Mo ?<0.5% Ni ?<1.0% Nb 0.005-0.10% Al ?<0.07% Ti <0.035% and B <0.004%.

Abstract: The present invention relates to a high strength steel tube. In addition, the invention relates to a method of manufacturing a high strength steel tube. The method is characterized in that a hot rolled pre-tube is subjected to at least two hardening steps with a final tempering step, the pre-tube is heated to a quenching temperature of at least Ac3 temperature for hardening and is heated to a tempering temperature in the range of 400 to 600° C. for tempering.

Abstract: The present invention relates to a perforating gun tube, characterized in that the tube is made of a steel alloy comprising, in addition to iron, the following alloying elements, expressed in mass percent: C 0.12-0.22% Si 0.3-1.0% Mn 1.0 - 4% Cr 0.5 - 2% Mo 0.1 -1%, V 0.05 -0.2% Ti 0.02 - 0.1% and B 0.001 - 0.01% and impurities due to melting, and that the tube has a yield strength, RP0,2 , in the range of 750 to 1100 MPa. In addition, a perforating gun having such a perforating gun tube is described.

Abstract: The present invention relates to a high strength steel tube. In addition, the invention relates to a method of manufacturing a high strength steel tube. The method is characterized in that a hot rolled pre-tube is subjected to at least two hardening steps with a final tempering step, the pre-tube is heated to a quenching temperature of at least Ac3 temperature for hardening and is heated to a tempering temperature in the range of 400 to 600° C. for tempering.

Abstract: In a method of producing a tubular structure for a gas generator, a tubular body is positioned relative to a forming device having inner and outer tools, which are moved relative to an end portion of the tubular body until an inner circumferential surface of a neck of the end portion rests against a support surface of the inner tool to reduce a diameter of the end portion by a tool contour of the outer tool and thereby form a shoulder. The outer tool is held in position upon the end portion and the neck inner circumferential surface is calibrated by a calibrating surface on a calibrating member of the inner tool while an outer circumferential surface of the neck is supported by the outer tool, as the inner tool is removed from the end portion. The outer tool is then removed from the end portion of the tubular body.

Abstract: The present invention relates to a gas generator pipe of an airbag module, the gas generator pipe consisting of a steel alloy with a martensitic matrix. The gas generator pipe is characterized in that the gas generator pipe has a tensile strength, Rm, of at least 1,100 MPa, and the steel alloy has the following alloying elements apart from iron and melt-related impurities in mass percent (Ma %): C 0.05-0.18% Si 0.4-2.6% Mn 0.2-1.4 % Cr 2.0-4.0% Mo 0.05-1.0% N <0.015% and at least one of the alloying elements Nb, V, Al and Ti in total at least 0.01%, the gas generator pipe has been subjected to a quenching and partitioning heat treatment and the gas generator pipe has a microstructure of martensite and austenite and the amount of austenite in the microstructure is at least 5%. Furthermore, the invention relates to a method of manufacturing such a gas generator pipe.

Abstract: The present invention relates to a tubular element for a gas pressure container of an airbag system of a motor vehicle, wherein the tubular element (10) has at least one first length section (100, 101) and at least one recess (11) extending in the circumferential direction, characterized in that the tubular element (10) has at least one second length section (102), formed by the recess (11) extending over at least a part of the circumference of the tubular element (10), that the second length section (102) lies between two first length sections (100, 101), that in at least one first length section (100, 101) the outer radius (A1) of the tubular element (10) is greater than the smallest outer radius (A2) of the at least one second length section (102), that the tubular element (10) has a tensile strength of >920 MPa, that the wall thickness (W2) of the tubular element (10) in the at least one second length section (102) is thicker than or equal to the wall thickness (W1) in at least one first length section

Abstract: A tubular product includes a tubular body made of steel and having a tube wall which includes an opening. The opening is produced by a high-speed stamping process at a stamping speed of more than 4 m/s. The opening is situated in the tube wall in a region thereof which has a tensile strength Rm>800 MPa.

Abstract: A gas pressure container for an airbag system of a motor vehicle is disclosed having a tube element with a high bursting resistance when internal pressure is being applied. The tube element includes a steel alloy and a first longitudinal portion of the tube element has a tensile strength Rm,11 higher than (>) 800 MPa, a transition temperature Tu,11 of at least ?40° C., and an outer circumference U1. The tube element also includes at least one second longitudinal portion and/or additional longitudinal portions, which extend axially from the first longitudinal portion. The second longitudinal portion or the additional longitudinal portions and the first longitudinal portion are formed from a seamless or welded single-piece tube made of a uniform material, and more specifically from a hot-rolled or cold-drawn tube.

Abstract: In a method of producing a tubular structure for a gas generator, a tubular body is positioned relative to a forming device having inner and outer tools, which are moved relative to an end portion of the tubular body until an inner circumferential surface of a neck of the end portion rests against a support surface of the inner tool to reduce a diameter of the end portion by a tool contour of the outer tool and thereby form a shoulder. The outer tool is held in position upon the end portion and the neck inner circumferential surface is calibrated by a calibrating surface on a calibrating member of the inner tool while an outer circumferential surface of the neck is supported by the outer tool, as the inner tool is removed from the end portion. The outer tool is then removed from the end portion of the tubular body.

Abstract: A tubular product includes a tubular body made of steel and having a tube wall which includes an opening. The opening is produced by a high-speed stamping process at a stamping speed of more than 4 m/s. The opening is situated in the tube wall in a region thereof which has a tensile strength Rm>800 MPa.

Abstract: A gas pressure container for an airbag system of a motor vehicle is disclosed having a tube element with a high bursting resistance when internal pressure is being applied. The tube element includes a steel alloy and a first longitudinal portion of the tube element has a tensile strength Rm,11 higher than (>) 800 MPa, a transition temperature Tu,11 of at least ?40° C., and an outer circumference U1. The tube element also includes at least one second longitudinal portion and/or additional longitudinal portions, which extend axially from the first longitudinal portion. The second longitudinal portion or the additional longitudinal portions and the first longitudinal portion are formed from a seamless or welded single-piece tube made of a uniform material, and more specifically from a hot-rolled or cold-drawn tube.

Abstract: The present invention relates to a motor vehicle with at least one chassis component (1). The chassis component is characterized in that the chassis component (1) has a yield strength Rp0.2 of at least 600 MPa, a tensile strength Rm of at least 850 MPa and is utilized in a delivery condition air-hardened and in that the chassis component (1) consists of an air-hardening, mainly bainitic material. Furthermore a chassis component and a material for a chassis component are described.

Abstract: The present invention relates to a coating material in the form of a suspension for the coating of metal surfaces of components prior to a thermal treatment for protection against corrosion. The coating material is hereby characterized in that the solid phase of the suspension primarily is composed of aluminum particles, and the liquid phase is composed of organic solvents and binders, the solid phase of the suspension containing at least two types of aluminum particle shapes, which are differentiated by their specific surface. In addition, a component is described, whose metal surface has been coated with a coating material according to the invention prior to thermal treatment and which has a contact resistance of <1 mOhm (DIN EN ISO 18594) after thermal treatment.

Abstract: A torsion suspension includes two longitudinal control arms having front ends and rear ends in travel direction and a torsion axle extending transversely to and interconnecting the longitudinal control arms. A bearing assembly swingably supports the front ends of the longitudinal control arms in relation to a vehicle body. Coupled to each the rear ends of the longitudinal control arms are transverse control arms for absorbing lateral forces.

Abstract: A control arm includes a connection tube and two mounting eyes respectively attached to opposite ends of the tube. Each mounting eye has a sleeve and a rubber-metal element vulcanized into the sleeve. In a method of making such a control arm, an elongate tubular member is sized to a sleeve blank of a length commensurate with the tube. Parallel thereto, an extruded profile is made with a cross sectional configuration of the sleeve and subsequently sized to the axial height of the sleeve. Rubber-metal elements are vulcanized into the sleeve blanks which together with the tube are then clamped, axially shiftable, in a friction welding machine for subsequently fabricating protruding collars on the sleeves through material removal and joining the end surfaces of the protruding collars with the end surfaces of the tube. While still clamped, the tube and the mounting eyes are calibrated through cold upsetting and the joints are smoothed.

Abstract: A control arm includes a connection tube and two mounting eyes respectively attached to opposite ends of the tube. Each mounting eye has a sleeve and a rubber-metal element vulcanized into the sleeve. In a method of making such a control arm, an elongate tubular member is sized to a sleeve blank of a length commensurate with the tube. Parallel thereto, an extruded profile is made with a cross sectional configuration of the sleeve and subsequently sized to the axial height of the sleeve. Rubber-metal elements are vulcanized into the sleeve blanks which together with the tube are then clamped, axially shiftable, in a friction welding machine for subsequently fabricating protruding collars on the sleeves through material removal and joining the end surfaces of the protruding collars with the end surfaces of the tube. While still chucked, the tube and the mounting eyes are calibrated through cold upsetting and the joints are smoothed.

Abstract: A steering knuckle of aluminum or an aluminum alloy for a wheel suspension on a front axle of a motor vehicle, designed as a one-piece forging which has a wheel-bearing socket (2), that is wider than it is thick, with a through hole (3) designed to accept a screw-in bearing flange. The steering knuckle has a radius arm connection bracket (20) and a carrier arm connection bracket (21), offset with respect to each other, formed on an end surface of the wheel-bearing socket (2). A web-shaped brake caliper connecting section (25) is formed on a first side of the wheel-bearing socket (2). A neck (7), which is designed as a solid section with an arc-shaped contour in the longitudinal direction, extends from the wheel-bearing socket (2). A free end surface (11) of the neck is provided with connection structures (13, 13') for transverse links, and a trackrod arm (15) projecting to the first side.