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JP4287561B2 |
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JP4289686B2 |
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JP2009133335A |
To provide a leaf spring material having improved mechanical property by using radio-frequency heating, and to provide its manufacturing method for manufacturing the same in a stable manner.The leaf spring material is formed of an approx...
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JP4267199B2 |
The invention concerns a method for ultrasonic shot blasting of large-dimensioned annular surfaces (5) on thin workpieces (1). Said method is characterised in that the surface to be shot blasted (5) performs at least N = five revolutions...
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JP4269443B2 |
A surface treating and smoothing method of surface-treating and smoothing a sliding member (7) including steps of finishing the sliding member (7) by pressurized particle containing fluid blasting to a sliding surface with surface roughn...
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JPWO2007066540A1 |
Stopping burrs in the vicinity of the friction welding joint with burrs so that the fatigue strength in the vicinity of the friction welding joint with burrs, which is formed by joining two metal members by the friction welding method, i...
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JP4259347B2 |
A non-heat treated seamless steel pipe comprising, by weight, C: 0.10 to 0.25%, Si: 0.05 to 1.00%, Mn: 0.50 to 2.50%, P: not more than 0.03%, S: not more than 0.05%, Cr: 0.40 to 1.50%, Mo: 0.05 to 1.50%, V: 0.02 to 0.30%, Al: 0.003 to 0....
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JP4261879B2 |
A long life rotating body with an excellent fatigue strength and a method of manufacturing the rotating body, the rotating body formed by welding the end parts of stacked two sheets of sheet metal to each other comprising lap fillet weld...
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JP2009090443A |
To provide a surface reforming technique for a member to be reformed such as a metal, particularly, a surface reformer for imparting a peening effect to the member to be reformed arranged at a specified interval from the reformer without...
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JP4256701B2 |
An object of the invention is to provide a steel having good fatigue life characteristics and acoustic characteristics by eliminating the harmful effects of oxide based inclusions. The object is attained by the following steel. A steel h...
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JP2009079238A |
To provide a carburizing, nitriding or carbonitriding method which spends a short period of time for heat treatment.This carburizing, nitriding or carbonitriding method includes the steps of: projecting a projection material composed of ...
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JP4254345B2 |
To provide a high strength connecting rod having successful machinability and buckling strength. The connecting rod 10 is comprised of a shaft 40 forming a main body, a large end 20 positioned at an end side of the shaft 40, and a small ...
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JP4253719B2 |
A high Cr ferritic heat-resistant steel (Cr content of 15 mass % or less), which, at least a region 10 mu m in depth as measured from the surface has a worked texture comprising elongated ferritic grains or a fine crystal grain texture c...
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JP4252351B2 |
Cold formed spring of high fatigue and corrosion fatigue strength obtained from a steel wire containing (%):C (0.45-0.52), Si (1.80-2.0), Ni (0.30-0.80), Cr (0.15-0.35) and V (0.15-30), remainder Fe, cured and tempered by high frequency ...
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JP2009068079A |
To provide a steel tube having excellent steam oxidation resistance and suitable as a material used for boilers in power generation facilities, tubing and various heat exchangers, etc.The steel tube with excellent steam oxidation resista...
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JP2009061465A |
To provide a metallic mold for cold forging which can suppress the galling of a formed product forged thereby by preventing a hardened film on the surface of thereof from wearing or exfoliating, and to provide its manufacturing method.Th...
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JP2009052144A |
To provide a high strength spring having high strength, excellent durability and excellent formability as well.The high strength spring is formed of a steel wire having a composition comprising, by mass, 0.55 to 0.65% C, 1.88 to 2.18% Si...
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JP4235176B2 |
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JPWO2007023936A1 |
For carburized and hardened metal parts, only the surface abnormal layer that adversely affects the fatigue strength is eroded, and the martensite structure directly under the surface abnormal layer is not peened, that is, surface cracks...
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JP2009047251A |
To provide a metallic plate fastening method capable of enhancing its fatigue strength by a simple method in a fastening structure for fastening a metallic plate to an object for fastening.In the metallic plate fastening method, the temp...
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JP4234892B2 |
To provide a bainite rail superior in brittle fracture development resistance characteristic and fatigue resistance characteristic by relieving the tensile residual stress of the head part and bottom part of the rail. In the bainite rail...
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JP2009041109A |
To provide a method for manufacturing a sintered body of metal powder having a layer which has density almost equal to full density when sintered.The method for manufacturing the sintered body of the metal powder includes the steps of: u...
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JP4223144B2 |
To obtain a good and stable passing property by suppressing a mutual adverse effect of tension variance, etc., of a metal plate between an inlet side section, an outlet side section and a rolling mill, in a steel process line control dev...
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JP2009024846A |
To provide a touchdown bearing capable of improving seizure resistance and abrasion resistance.This touchdown bering (an angular ball bearing 7) is provided in a magnetic levitation type turbo-molecular pump having an axial magnetic bear...
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JP2009014126A |
To inexpensively produce a roller bearing capable of securing a sufficient service life under a condition with foreign substances entrapped.Before hardening cylinder rollers 7, 7, both axial end edges of these cylinder rollers 7, 7 are c...
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JP2009012061A |
To provide a laser-beam working machine with which a compressed residual stress layer can be formed on the surface of a material to be worked under state of maintaining the precision of the surface roughness even to the material to be wo...
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JP2009007602A |
To provide a rust-preventive method hardly causing the corrosion of a base material and the reduction of a mechanical strength, and to provide a rolling device hardly causing rust and long in service life.A self-aligning roller bearing c...
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JP4208298B2 |
To effectively obtain an effect of enhancing fatigue strength equal to that of two-stage shot peening by projecting a mixture of shots having different sizes, large and small. In the shot peening method for accelerating shots and for pro...
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JP4205921B2 |
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JP2008307680A |
To provide a method to treat a surface of ferritic/martensitic 9-12% Cr steel or austenite Cr steel for the purpose of achieving improved durability against oxidation and solid particle erosion at application temperature above 500C, in p...
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JP4202126B2 |
A method, and machine for implementing the method, for transverse ultrasound peening of blades on a rotor that drives in rotation a wheel bearing the blades about its geometrical axis arranged substantially vertically and causes the blad...
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JP4194927B2 |
The hot forming of a steel piece of a given composition consists of: (a) the possible application of a heat treatment to procure a primary globular structure; (b) reheating to an intermediate temperature between the solidus and liquidus ...
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JP4195601B2 |
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JP4189201B2 |
A method of improvement of toughness of a heat affected zone in a multi-layer welded joint, a fillet welded joint, and a one-pass or several-pass large heat input welded joint of a steel plate is provided, that is, a method of improvemen...
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JP4188970B2 |
The present invention provides a cam lobe material that is excellent in sliding characteristics, such as wear resistance, scuffing resistance and pitting resistance, and can be advantageously used in engines to which high loads are appli...
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JP4187267B2 |
A method of laser shock peening a metallic part by firing a laser on a laser shock peening surface of the part which has been adhesively covered by tape having an ablative medium, preferably a self adhering tape with an adhesive layer on...
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JP2008281064A |
To provide a ball screw mechanism avoiding abrasion of a ball or damage of a nut, and ensuring smooth movement.Shot-peeling work is applied to at least a part of a female screw groove 2a of a nut adjacent to an attachment hole 2b, and th...
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JP2008264993A |
To provide a device and a method for improving the surface finish and completeness of a work.The method and the device improve the surface finish and/or surface completeness of the work molded or shaped by a tool 12 to increase the surfa...
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JP2008267403A |
To provide a long-life rolling device hardly causing damage of a raceway surface.At least one of the raceway surface 1a of the inner ring 1 of a conical rolling bearing and the raceway surface 2a of the outer ring 2 thereof is finished b...
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JP4175209B2 |
A high-temperature member for use in a gas turbine is formed from a cobalt-based alloy comprising 15-35 wt% of chromium; 0.02-1.5 wt% of silicon; 0.01-0.2 wt% of carbon; at least one kind of metal selected from the group consisting of ni...
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JP4167781B2 |
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JP4168342B2 |
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JP4164995B2 |
To provide a method for modifying the surface of alloy steel for machine structures excellent in fatigue strength under the load condition in which stress ratio is positive, and to provide a surface modified material. In this method for ...
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JP2008223071A |
To provide a surface treatment method for stainless steel where, though stainless, particularly, sulfur based free-cutting stainless steel such as SUS303 and SUS430 having a high sulfur content is used for securing its free-cutting, the ...
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JP4154399B2 |
Spherical particles having curvatures larger than those of irregularities, crystal grain boundaries, lattice defects or the like (referred to collectively as irregularities, hereinafter) on the surface of a conductive metal material are ...
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JP4141336B2 |
The method involves clamping a section of a single metallic thin wire (2) in a lengthwise rotatable clamp (11), and applying tension to a free end of the wire. The wire is twisted by rotating the clamp, to rotate the wire in a primary di...
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JP4137122B2 |
A method of manufacturing a cam shaft that prevents cracks during the joining of a cam lobe to a shaft, and improves the degree of freedom of design of the cam lobe is provided. By a method of manufacturing a cam shaft that after an inne...
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JP2008178888A |
To provide a method in which a residual compressive stress is sufficiently large around the surface of a workpiece and in which the distribution region of the residual compressive stress is formed thickly on the surface of the workpiece,...
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JP4129203B2 |
To provide a material of a stabilizer, a producing method and a product which can correspond to the trend toward high rigidity in the recent years while considering the peculiarity as a spring of the stabilizer. A steel containing, by wt...
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JP2008169455A |
To provide a method different from a conventional method for improving fatigue strength, that is, a new working method for improving the fatigue strength by bending.The method for improving the strength of a member is provided for improv...
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