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JP5393280B2 |
A spring wire (20) with hardness of 50 to 56 HRC is subjected to first and second shot peening processes (S6) (S7) within a warm working temperature range of 150 to 350°C. In the first shot peening process (S6), the first shot of a shot...
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JP5392099B2 |
To provide a rolling sliding member and a method of manufacturing the same, capable of securing the service life equal to or more than a conventional rolling sliding member made of bearing steel, by using an inexpensive material. After h...
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JP5381045B2 |
Provided is a method for manufacturing a blasting material for shot peening with which a reliably high level of hardness can be achieved while preventing an increase in the material cost. Quenchable steel is used as a material in a blast...
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JP5385574B2 |
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JP5381171B2 |
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JP5378512B2 |
A carburized component has improved fatigue strength in a "low to medium cycle region", wherein base steel is a steel having a chemical composition containing, by mass%, C: 0.15-0.25%, Si: 0.03-0.50%, Mn: more than 0.60% and not more tha...
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JP5379511B2 |
To provide a steel for machine structures which not only has excellent cold workability but also can secure prescribed hardness and strength after working, and to provide a steel component for cold working obtained by using the steel for...
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JP5375476B2 |
To provide an estimation method of a compression stress value, a compression stress value estimator, and a laser processing apparatus for correctly estimating the magnitude of compression stress applied to a member to be processed having...
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JP2013241961A |
To provide a gear manufacturing method capable of obtaining strength improvement effect of a tooth flank, and a gear.A gear manufacturing method includes a gear forming process for forming a gear and a surface modification treatment proc...
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JP5360253B2 |
To provide a laser peening treatment method for improving fatigue property more than the conventional methods in an environment where repeated loads act on a weld toe portion of a weld structure and a plastic deformation region of a form...
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JP5361098B1 |
Tensile residual stress due to coiling processing is solved and appropriate compressive residual stress distribution is imparted by forming C-condensed layer at the wire material surface, so that compression coil spring having high durab...
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JP5353760B2 |
To provide a method for manufacturing an electric resistance welded steel tube having excellent deformability which is suitable for pipe lines for a reel barge. A step of imparting the tensile strain in the tube axial direction of at lea...
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JP5355905B2 |
The invention provides structural component for an automobile, two-wheeled vehicle or railcar excellent in impact-absorption property, shape fixability and flange cuttability, and method for producing the same, which structural component...
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JP5355891B2 |
A composition for producing a protective coat against scaling on metallic surfaces. The composition includes, as binders, hydrolysates/condensates of at least one silane or a silicone resin binder and also, further, at least one metallic...
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JP2013233590A |
To provide a welded joint which has improved fatigue strength by introducing compressive residual stress without giving deformation causing another stress concentrating part to a welding part, and is suitable for applying a steel structu...
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JP5344021B2 |
To provide a hot-rolled steel sheet for chemical conversion treatment inexpensively, and to provide a method for manufacturing the same. The hot-rolled steel sheet for chemical conversion treatment includes, by mass, 0.01-0.10% C, 0.01-2...
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JP2013230536A |
To provide a surface treatment method capable of smoothing a surface itself of a metal member on which a nanocarbon film is formed, and reliably fixing the nanocarbon film to the surface of the metal member.In a surface treatment method ...
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JP5341971B2 |
Uniform nano-scale microstructures can be reliably formed on the surface layer of this metal product while still improving the surface roughness and make the surface layer robust enough not to disappear due to wear. The surface of the me...
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JP5333118B2 |
To provide a high-strength electric resistance welded tube for a steel pipe pile, and a method for producing the same. In the electric resistance welded tube forming step consisting of the roll forming, the electric resistance welding, a...
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JP5328898B2 |
A method of making a bearing includes providing a bearing intermediate, which is unfinished while having an overall shape of a finished bearing product; and repeatedly impacting a surface of the bearing intermediate at one or more ultras...
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JP5327567B1 |
To provide a method for improving a fatigue performance of a metal member in a large steel structure such as a bridge, a ship or a marine structure receiving a repeated load, or in a machine product such as an automobile or a constructio...
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JP5328785B2 |
Steel, characterized in that the composition thereof is, in percentages by weight: C=0.20-0.30% Co=trace levels-1% Cr=2-5% Al=1-2% Mo+W/2=1-4% V=trace levels-0.3% Nb=trace levels-0.1% B=trace levels-30 ppm Ni=11-16% with Ni≧7+3.5 Al Si...
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JP2013220509A |
To provide a shot peening method capable of excellently improving the tooth flank fatigue strength of a gear material, and to provide a gear material using the same.In a shot peening method, a shot material having a granular diameter wit...
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JP5325432B2 |
To provide an advantageous method for manufacturing a cold-worked article, which can effectively inhibit crystal grains from being coarsened even when strain due to heat treatment is formed, while securing the strength and toughness of t...
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JP2013213260A |
To provide a surface treatment method of a gear, capable of improving the conformability of a tooth surface after being subjected to a treatment in which the tooth surface of a gear is highly hardened.A surface treatment method of a gear...
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JP5316298B2 |
To provide a method for strengthening a carburizing-treated component by which a high compressive residual stress can inexpensively and easily be imparted onto the outermost surface of a carburizing-treated component, and also, the distr...
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JP2013202670A |
To provide an easy method for improving simultaneously both tensile strength and fracture toughness of high-strength ferrite/martensitic steel in a low temperature region.A method includes: a first step of enhancing tensile strength of a...
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JP2013204103A |
To provide a high strength steel pipe of API X100 grade, superior in buckling resistance and toughness at low temperatures after coating treatment, a method for producing the high strength steel pipe, and a method for producing a steel s...
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JP5307684B2 |
The continuous process for fabricating a framework component, comprises cold deforming a semi-product, subjecting the semi-product to plasma nitration treatment, and irradiating a part of a surface of the deformed semi-product with a sho...
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JP5306795B2 |
To provide a connecting rod whose body part has excellent strength and which is suitable for reduction in weight, and to provide a method for manufacturing the connecting rod. The connecting rod 1 includes a rod body part 10, and a small...
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JP5305123B2 |
The invention aims to improve not only the resistance to abrasion and scoring, but also the fatigue strength against pitting and chipping, without increasing the number of steps of the manufacturing process. The tooth face 2 of the gear ...
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JP5296186B2 |
This heat-resistant austenitic stainless steel has a specific composition containing Ce and Zr and has an Hv1/Hv0 ratio of 1.20 or higher, where Hv1 is the average hardness of the area ranging from the surface to a thickness-direction de...
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JP5296955B2 |
To provide a fine stainless-steel wire for spring which is a stainless- steel wire for spring forming, particularly a fine wire e.g. of <=0.8 mm obtained by wet wiredrawing, and can be obtained by applying oil lubricant capable of contri...
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JP5288689B2 |
An apparatus for process control of a burnishing process including a body having a first end (14) and a second end (16), at least one process control coupon (100), and structure for attaching the process control coupon (100) to the body....
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JP5284555B2 |
A process for forging large components of Alloy 718 material so that the components do not exhibit abnormal grain growth includes the steps of: a) providing a billet with an average grain size between ASTM 0 and ASTM 3; b) heating the bi...
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JP5283180B2 |
To provide a surface treatment method of a metal part for improving bending fatigue strength and twisting fatigue strength of a surface of the metal part. This surface treatment method includes a process for performing shot peening of th...
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JP2013159802A |
To provide a coil spring which achieves the reduction in material cost and the simplification of a production process without lowering a yield rate and is excellent in fatigue resistance.A coil spring has a composition comprising, by mas...
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JP5264165B2 |
A method of reducing crack propagation in an airfoil (22) includes: providing an airfoil (22) having a root (36) spaced apart from a tip (34), spaced-apart leading and trailing edges (30, 32), a suction side (40) extending from the leadi...
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JP5264756B2 |
Autofrettage method comprises reducing the volume for the fluid using a displacement plunger (19) which is displaced by a displacement plunger opening (6) of a workpiece (2) in the inner chamber (5) of the workpiece.
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JP5260410B2 |
To provide a preventive maintenance technique which has excellent reliability after construction by inspecting a weld of a bottom mounted instrumentation nozzle in a reactor pressure vessel in advance to change a condition of build-up we...
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JP5258458B2 |
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JP5250609B2 |
A steel for high-strength spring has an Ac 3 transformation temperature as an indicator of the decarburization performance, which is calculated by Equation (1) below, is from 859 to 885°C, a maximum hardened diameter DI as an indicator ...
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JP5252112B1 |
To significantly improve the fatigue strength of a welded joint by peening the welded structure after welding with a simple tool and introducing compressive residual stress. To provide. This is a peening construction method in which a pe...
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JP5240971B2 |
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JP5237032B2 |
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JP5231266B2 |
Provided is an outer member of a constant velocity universal joint, which suppresses occurrence of cracking in a joining portion of the constant velocity universal joint and has stable quality. The outer member of the constant velocity u...
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JP5225596B2 |
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JP5207805B2 |
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JP5208070B2 |
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JP5208064B2 |
To provide a water jet peening method which allows an accurate check of the effects of improving residual stress on a WJP workpiece.A high-pressure water stream is jetted from a scanning nozzle to apply impact waves generated when bubble...
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