A gear manufacturing method includes a step of preparing a gear blank; a step (teeth cutting step) of cutting the gear blank to form a half-finished gear having a plurality of gear teeth; a step (heat treatment step) of heat-treating the half-finished gear having the gear teeth; and a step (form rolling step) of rolling the half-finished gear which is subjected to the heat treatment, in which the gear teeth of the half-finished gear which is subjected to the teeth cutting step is formed with protuberances on both sides in a circumferential direction, and at the form rolling step, the protuberances are pressed by a rolling die, so that the half-finished gear becomes a gear.

A heat-resistant magnetic domain refined grain-oriented silicon steel, a single-sided surface or a double-sided surface of which has several parallel grooves which are formed in a grooving manner, each groove extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel, and the several parallel grooves are uniformly distributed along the rolling direction of the heat-resistant magnetic domain refined grain-oriented silicon steel. Each groove which extends in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel is formed by splicing several sub-grooves which extend in the width direction of the heat-resistant magnetic domain refined grain-oriented silicon steel. The manufacturing method for a heat-resistant magnetic domain refined grain-oriented silicon steel comprises the step of: forming grooves on a single-sided surface or a double-sided surface of a heat-resistant magnetic domain refined grain-oriented silicon steel in a laser grooving manner, a laser beam of the laser grooving is divided into several sub-beams by a beam splitter, and the several sub-beams form the several sub-grooves which are spliced into the same groove.

The present disclosure provides a method for producing a magnetic component that enables efficient processing of an amorphous soft magnetic material or a nanocrystalline soft magnetic material. The method for producing a magnetic component comprising an amorphous soft magnetic material or nanocrystalline soft magnetic material comprises: a step of preparing a stacked body comprising a plurality of plate-shaped amorphous soft magnetic materials or nanocrystalline soft magnetic materials; a step of heating at least a portion of shearing in the stacked body to a temperature equal to or higher than the crystallization temperature of the soft magnetic materials; and a step of shearing the stacked body at the portion of shearing after the step of heating.

Steel according to one embodiment of the present invention has predetermined chemical components, wherein in a region where a distance r from the center of a cross-section perpendicular to the length direction satisfies 0.7Rr0.9R, structures include ferrite and bainite, the average fraction of the ferrite is in the range of 40 to 70% in terms of area ratio, the total average fraction of the structures other than the ferrite and the bainite is 0% or more and 3% or less on average, and the balance includes bainite; and the standard deviation of a ferrite fraction in the region is 4% or less.

Formation of a deformation along a surface of a sheet metal panel of an electronic device is minimized or prevented by determining an area of the surface to which a deformation has developed or is predicted to develop, where the deformation forms or is predicted to form in response to one or more of the surface features being provided into the surface. A score line is provided along the surface that is at or proximate the area.

A process of manufacturing of segment for carbon thrust bearing uses stainless-steel (SS) round bars/sheets/logs of suitable grade as raw material. The SS round bars/sheets/logs undergo cutting operation to cut into SS billets. The billets successively undergo heating and hot forging processes to form segments of desired shapes. Thereafter, the segment is subjected to heat treatment process i.e. stress relieving, hardening and tempering process successively for obtaining consistent and uniform grain structure, mechanical properties and physical properties of segments which are cost-effective in terms of lower maintenance and lower handling efforts. After heat-treatment process, segment undergoes surface-finishing processes i.e. grinding, lapping and polishing successively for obtaining mirror like surface finishing that gives greater anti-friction property and lower co-efficient of friction. The manufacturing process according to present invention yields consistent grain structure, refine, dense and uniform microstructure of segments which imparts optimum strength, ductility, toughness and resistance to impact and fatigue.

A method for producing a workpiece having a toothing or profiling, including the steps: a) Soft machining the workpiece, in which the toothing or profiling is produced; b) Hardening the toothing or profiling; c) Hard fine machining the toothing or profiling, wherein the toothing or profiling is machined with a first tool that is a grinding worm, a grinding wheel or a honing wheel, wherein the tool has a base body with a first elastic modulus; d) Reinforcement of at least a section of the workpiece by a shot blasting process; and, following step d): e) Repeated hard fine machining of the toothing or profiling, wherein the toothing or profiling is machined with a second tool that is a grinding worm, a grinding wheel, a set of grinding wheels or a honing wheel. The second tool has a base body with a second elastic modulus which is at most 33% of the first elastic modulus. The second tool has a base body made of a plastic or rubber.

A device and a method for connecting sheet metal parts to form lamination stacks are demonstrated, in which sheet metal parts are stamped out of an electrical steel strip by means of at least one stamping stage, which has a die and a cutting edge that cooperates with the die, and the stamped-out sheet metal parts are stacked and at least integrally joined to form a plurality of lamination stacks; at least between a first sheet metal part of the stacked sheet metal parts and the subsequent second sheet metal part of the stacked sheet metal parts, a separating element is provided in order to facilitate the separation of the integrally joined sheet metal parts in lamination stacks. In order to improve the reproducibility of the method, when applying the separating element, it is proposed that after the first sheet metal part is stamped out and before the second sheet metal part is stamped out, the separating element which, in accordance with the die geometry, is smaller or of the same size is conveyed to the die, is inserted into said die, and is thus provided to the first sheet metal part.

A grain-oriented electrical steel sheet according to the present invention includes a base steel sheet having plural grooves on a surface and a glass film formed on the surface of the base steel sheet. In case of viewing region including grooves in cross section orthogonal to groove longitudinal direction, a straight line passing through peak point present on profile line of glass film and parallel to groove width direction orthogonal to sheet thickness direction in cross section is defined as reference line, a point present on boundary line between glass film and base steel sheet and present at lowest location in sheet thickness direction is defined as deepest point, and a point present on boundary line and present at the highest location in the sheet thickness direction in region having the deepest point in a center and having length of 2 m in groove width direction is defined as shallowest point, a relationship between shortest distance A between reference line and deepest point and shortest distance B between reference line and shallowest point satisfies Expression (1).

0.1 mAB5.0 m(1)

An amorphous alloy particle is an amorphous alloy particle formed of an iron-based alloy, and the particle contains a grain boundary layer.