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JP2007246975A |
To provide a method of manufacturing a steel shaft by which the fatigue strength of the entire steel shaft can be enhanced by releasing the residual tensile stress in the shaft while maintaining the surface strength of the steel shaft su...
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JP3983180B2 |
To provide a method by which fatigue strength can sufficiently be improved for a metallic member having such notched part as to develop the notching effect. After accelerating shot particles having as large diameter as possible within th...
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JP2007239880A |
To provide a power transmission shaft capable of obtaining high compression residual stress upon quenching and improving fatigue strength, and its manufacturing method. The power transmission shaft includes a surface-hardened layer 4. Pa...
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JP3978004B2 |
To provide a corrosion-resisting and wear resisting alloy including cobalt, nickel or iron as a base used for a sliding part or a valve seat for a machine, and restraining erosion and corrosion caused by eutectic carbide constituting the...
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JP3977688B2 |
The rollers (8) may be inclined at an angle of 35 degrees. They are pressed into the corners of a broad bearing groove by a pair of inclined guide surfaces (9) on the deforming tool (7) to form small grooves (4). There are tool housing m...
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JP2007526127A |
The invention relates to a method for producing a structural part, especially a die-formed part, from hypereutectoid steel, wherein the structural part is produced in one or more hot-forming steps by means of contoured tools starting fro...
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JP3975314B2 |
In a material for bearing parts constructed from a steel hardened by a heat treatment, its surface layer is adjusted, before a shot peening treatment, for a mean particle size of carbide to less than 1 mu m, an area percentage of carbide...
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JP3974840B2 |
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JP3974385B2 |
The rotor comprises a rim (10) on the periphery (12) of which several removable blades are fastened. The blade fasteners comprise a dovetailed groove (14) and a foot fitted in the groove. The groove is shot blasted by projecting balls (1...
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JP2007224366A |
To provide a high strength stainless steel spring having excellent workability and high load characteristics. The high strength stainless steel spring has a composition consisting of, by mass, 0.04 to 0.08% C, 0.15 to 0.22% N, 0.3 to 2.0...
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JP2007216241A |
To provide a laser beam peening device and a laser beam peening method capable of performing the consistent peening on a workpiece placed in a liquid. The laser beam peening device 1 has a guide body 6 with its incident surface 6b being ...
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JP3965107B2 |
To provide a method for producing a metallic product in which a fluorescent material is locally incorporated into a part of the surface. In the method for producing a metallic product in which a fluorescent material is locally incorporat...
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JP2007197800A |
To provide a method for surface treatment and heat treatment of a metal product by which hardness of a surface of the metal product is increased by increasing the carbon content in the surface of the metal product when projecting project...
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JP2007521400A |
Fixing screw formed by cold rolling consists of a material made from steel having a ferritic structure and further components having a higher carbon content compared with the carbon in the ferrite. The mixed structure has a carbon conten...
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JP2007182607A |
To provide a rolling member having the improved endurance life in a hostile environment for use in a constant velocity joint; to provide the constant velocity joint having the long life even in the hostile environment; and to provide a m...
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JP2007182926A |
To provide a needle-like roll bearing raceway member whose rolling fatigue life under a severe environment is improved, a needle-like roll bearing having a longer service lifetime even under a severe environment, and a manufacturing meth...
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JP2007182609A |
To provide a rolling member having the improved endurance life in a hostile environment for use in a wheel bearing device; the wheel bearing device having the long life even in the hostile environment; and a manufacturing method therefor...
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JP3943499B2 |
The present invention relates to a steel, in particular for tools exposed to corrosion, of the following composition (in mass-%): C: min. 0.02 and max. 0.12%; Si: max. 1.5%; Mn: more than 1.0-2.50%; P: max. 0.035%; S: min. 0.04% and less...
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JP3944046B2 |
To provide a treating method for enhancing fatigue strength of welded joint while ensuring good workability in a spot welded joint of metal sheet, particularly in the spot welded joint of high strength steel sheet. In the method for enha...
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JP3940264B2 |
To provide a steel wire rod and a wire drawing rod for a spring for producing a hard-drawn spring which exhibits excellent fatigue strength and permanent set resistance in fatigue equal to those of a spring using an oil tempered steel wi...
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JP3934475B2 |
To provide high-rigidity steel with a greatly enhanced rigidity without detriment to processibility and toughness/ductility by a relatively cheap ingot method; and a high-strength high-rigidity member having high rigidity strength, espec...
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JP3915043B2 |
To provide a method of manufacturing a steel for the manufacture of forging, for manufacturing forgings having excellent properties, and the forging. This steel for the manufacture of forging has a composition consisting of, by weight, 0...
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JP3909902B2 |
To provide steel parts for high bearing resistance, suitable for steel parts requiring high strength, making compact, etc., such as gears, cums, and bearing parts, attended by rolling and sliding and requiring rolling strength and wear r...
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JP3892640B2 |
To provide a shear deformation working method and a device therefor by which shear deformation for forming a shear deformed structure or a sheared texture can continuously be applied to a metallic thin sheet. In this working method for t...
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JP3893889B2 |
To provide non-heatteated steel for hot forging which is satisfactorily fractured when fractured at a notch as a starting point by working using a heat source in a technique for producing parts by separating the connecting rod of an auto...
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JP2007056333A |
To provide a method for shot-peening a nitrided member having a dense layer of a nitride formed thereon and a porous layer of the nitride formed on the dense layer when nitriding a member, by projecting a shot material against the nitrid...
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JP3888865B2 |
To provide a forging method for changing the metal structure into the fine ferrite and pearlite structure without employing a conventional quench- and-temper method, obtaining the strength in which the yield point (YP value) exceeds that...
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JP2007051354A |
To perform a shot-peening process to compensate the decrease of strength in the vicinity of a tooth surface edge caused by vacuum carburizing.When performing the shot-peening process after subjecting a hypoid gear 1 to vacuum carburizing...
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JP2007050766A |
To provide a bearing device for a wheel improving the fatigue life around a corner portion between a wheel attaching flange and pilot portion, suppressing increase of deflection due to the generation of crack, controlling lowering of ste...
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JP2007044698A |
To extend the service life of a structure by suppressing the occurrence and development of cracks in a welded structure constituting a power generation plant and in a welding method of the structure.In the welded structure 10 being in co...
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JP2007044760A |
To provide a hot-rolled flat steel bar in which the surface skin is adequately bright and adequately dim, and capable of demonstrating a novel design effect, and its manufacturing method.The hot-rolled flat steel bar comprises austenitic...
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JP3881921B2 |
To provide a method improving fatigue resistance of hollow cylindrical parts made of steel such as rollers for roller chains having hardness of HRC ≥45. The fatigue resistance of the hollow cylindrical parts made of steel is improved b...
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JP3880039B2 |
To provide a shot peening method capable of realizing the stronger shot peening and capable of generating the pre-stress possible to be regenerated over the whole of a cavity in a short time. Shot peening to a partition wall 2C of the ca...
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JP3879822B2 |
To provide a shot peening method allowing a more strong shot peening and capable of producing a reproducible prestress on all cavities in a shorter time. A specified amount of balls 10 are installed on the vibrating surface 8a of a sonot...
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JP3879059B2 |
To provide a method for manufacturing a metallic material of nanocrystalline structure by which performance can be improved, e.g. strength can be improved by providing nanocrystalline structure to a formed body or structure of metallic m...
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JP2007500782A |
Production of press-quenched components, especially chassis parts, made from a semi-finished product (2) made from unhardened hot deformed sheet steel comprises molding a component blank (10) from the semi-finished product by cold drawin...
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JP2006348342A |
To provide a rolling bearing having a long fatigue life at low cost.Inner and outer rings 1, 2 are produced by subjecting a steel having a composition comprising 0.2 to 1.2% C, 0.15 to 2.0% Si, 0.2 to 2.0% Mn, 0.5 to 2.0% Cr, ≤2.0% Mo,...
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JP3859331B2 |
To provide steel wire and spring, obtained by means of wire drawing without quench-and-temper treatment and excellent in heat resistance and fatigue strength, and their production. This steel wire is constituted of a steel wire containin...
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JP3859068B2 |
To improve the wear resistance and the seizure resistance of a sliding surface of an appliance such as an outer surface of a sliding surface of a piston pin of an internal combustion engine for a vehicle. A seizure resistance improving m...
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JP3859504B2 |
To provide a strengthening treatment method for the structure of the metallic material to be worked. The strengthening treatment method for the structure of the metallic material to be worked is attained from the three stages of (a) a st...
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JP2006334659A |
To provide a spheroidal graphite cast iron member with which the generation of cracks in a caulking part is prevented and to provide a joining method of the spheroidal graphite cast iron member with which the joining force of caulking is...
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JP3855418B2 |
To produce soft-nitrided parts having excellent fatigue resistance and wear resistance and to provide a method for producing a steel for soft- nitriding excellent in machinability to form into the stock thereof. The method for producing ...
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JP3857213B2 |
To reduce the manufacturing cost of castings by elongating the life of a metal mold for casting. A surface of a cavity in a fixed mold 12, that is a casting mold, made of SCM420 material is treated by a first shot peening treatment, a ni...
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JP3847350B2 |
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JP3846246B2 |
To provide a method for manufacturing a steel tube which solves the problem of a high yield ratio peculiar to a high-strength steel tube and secures the circularity of the tube. The steel tube manufactured by forming and welding a steel ...
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JP3844679B2 |
To provide a shot peening method used for a head of a blade having cooling air passage orifices and capable of generating prestress similarly repeatable for all the blades in a relatively short shot peening time. This shot peening is car...
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JP3843059B2 |
To provide a method for manufacturing a UOE steel tube of excellent seam welding strength characteristic and internal pressure fatigue characteristic for stabilizing the strength of a seam-welded portion and a HAZ of the high strength UO...
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JP3844267B2 |
To obtain a highly strong steel filament suitable for reinforcing rubber articles and excellent in ductility by controlling the strain of the surface layer of the steel filament on the bases of specific repeated twisting test values and ...
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JP3840172B2 |
To provide a method of manufacturing a UOE steel pipe of excellent HAZ toughness and improved strength-toughness balance. In a UOE steel pipe manufacturing method, a steel plate is successively subjected to C-forming, U-forming and O-for...
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JP2006283043A |
To provide a method for reforming the surface of a metallic material having no solid-phase transformation, which gives fine crystal grain, and the surface-reformed metallic material having no solid-phase transformation.The surface-reform...
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