A steel wire which has an excellent fatigue limit when made into a spring is provided. A chemical composition of the steel wire according to the present embodiment consists of, in mass %, C: 0.53 to 0.59%, Si: 2.51 to 2.90%, Mn: 0.70 to 0.85%, P: 0.020% or less, S: 0.020% or less, Cr 1.40 to 1.70%, Mo: 0.17 to 0.53%, V: 0.23 to 0.33%, Cu: 0.050% or less, Ni: 0.050% or less, Al: 0.0050% or less, Ti: 0.050% or less, N: 0.0070% or less, Ca: 0 to 0.0050%, and Nb: 0 to 0.020%, with the balance being Fe and impurities. In the steel wire, a number density of V-based precipitates having a maximum diameter ranging from 2 to 10 nm is 500 to 8000 pieces/?m.sup.2.

Disclosed herein is a method of forming an alloy material for use in a wire. The method includes forming a master alloy containing lead and silver; and creating a molten wire alloy by combining the master alloy, additional lead, and a third material in a vessel. The method also includes flowing argon gas through and over the molten wire alloy. The method also includes drawing the molten alloy from the vessel through an actively cooled die, and solidifying the molten wire alloy to form a bar of wire alloy.

A method of forming a metal-graphene composite includes coating metal components (10) with graphene (14) to form graphene-coated metal components, combining a plurality of the graphene-coated metal components to form a precursor workpiece (26), and working the precursor workpiece (26) into a bulk form (30) to form the metal-graphene composite. A metal-graphene composite includes graphene (14) in a metal matrix wherein the graphene (14) is single-atomic layer or multi-layer graphene (14) distributed throughout the metal matrix and primarily (but not exclusively) oriented with a plane horizontal to an axial direction of the metal-graphene composite.

The invention relates to a method for producing a roof rack, to an extruded profile for use in a method of this nature and to a novel roof rack for a vehicle. The novel roof rack for vehicles consists of an extruded profile (1) of aluminum, wherein the rail (13) is formed by a tubular profile part of the extruded profile (1), and the end feet (11, 12) are formed from a bend section of the tubular profile part. The roof rack has different cross-sections in the longitudinal direction, which are created by machining of at least one additional profile web on the extruded profile (1). Freely selectable lateral contours (20, 20) for a roof rack can be achieved in this way.

A composite object for the production of hydrogen from water-reactive aluminum may include a first portion including an aluminum alloy having a non-recrystallized grain structure, and a second portion including an activation metal corrodible to the aluminum alloy, wherein the second portion and the first portion are coupled to one another with the activation metal of the second portion in contact with the aluminum alloy of the first portion at a plurality of points of contact stress, and the activation metal of the second portion is penetrable into the non-recrystallized grain structure of the aluminum alloy of the first portion via the addition of heat.

A method for producing a component element for a furniture fitting, in particular a rail, includes the following steps to be carried out in chronological order: providing a planar sheet having a longitudinal extension, two top surfaces and two side surfaces spaced apart by a width of the sheet, as a semifinished product of the component element. The sheet has a wall thickness in the range of 0.5 mm and 1.5 mm, and is formed, preferably by an embossing stamp and/or an embossing roller, on at least one top surface with an indentation. The indentation is arranged transversely, preferably substantially orthogonally, to the longitudinal extension. The sheet is bent such that, in a cross section orthogonal to the longitudinal extension, a profile of the component element arises, and the bent sheet is mechanically separated in the region of the indentation.

The invention discloses electric conductor combined by composite conductor and its manufacturing method; the electric conductor forms interface with same or different characteristics among each layer contact surfaces with same or different properties, such as mixture, crystals, alloy, oxysome, etc. When it is electrified, it produces kinds of same or different current effect, such as skin effect, eddy current, ring current, magnetic effect, heat effect, crowding effect, or combined effect which combines each above-mentioned effect; it will play special role and effect if applied on reserved equipment.

The method is used to make metal fibers, more particularly steel fibers, from strip-shaped flat material, where the metal fibers have a substantially rectangular cross-section, and at least one of the wide side faces, preferably both of the wide side faces, is provided with at least one V-shaped anchor groove running longitudinally of the fiber. First, a material matched to the strength required for the metal fibers when they are used later on is used as the metal strip. In a first production line the metal strip, is fed from a coil to a straightening and transporting unit (3) by a driven and controlled unwinder (1). Downstream of a crop shear (4) that forms the leading end of the strip, the metal strip is fed to a profiling roll pair (6) consisting of an upper roll and a lower roll and forming a rolling tool. The profiling roll pair introduces anchor grooves and fracture grooves. Subsequently, the metal strip passes through a combined scoring and straightener (7) for scoring or straightening the anchor lines in the fracture grooves by means of one or more scoring roller pairs, and the metal strip is finally wound as a coil again by a winder (8). Thereafter, the last process step of the fiber make is carried out at a longitudinal and transverse dividing unit.

A rolling apparatus has a frame and first and second roller mounted in the frame, rotatable about respective first and second axes, forming a nip through which a workpiece passes in a direction of travel, and each having a radially outwardly directed rolling surface that bears radially on the workpiece. The first roller has an axially directed first guide face that bears axially on the workpiece in the nip. A positioning assembly axially positions the first roller relative to the second roller. A shaping die is positioned axially downstream of the nip in the direction and receives the workpiece after it passes through the nip.

A rolling apparatus has a frame and first and second roller mounted in the frame, rotatable about respective first and second axes, forming a nip through which a workpiece passes in a direction of travel, and each having a radially outwardly directed rolling surface that bears radially on the workpiece. The first roller has an axially directed first guide face that bears axially on the workpiece in the nip. A positioning assembly axially positions the first roller relative to the second roller. A shaping die is positioned axially downstream of the nip in the direction and receives the workpiece after it passes through the nip.