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JP3191010B2 |
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JP2001191160A |
To provide a manufacturing method of metal components having the initial stage of forming the metal components of a metal having the thixotropic structure in a semi-solidified condition so that the metal components represents the excelle...
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JP2001179308A |
To provide a method to manufacture large metal rolling materials made of steel neither quenched nor tempered whose differences between property of a surface layer and that of inside is small in an easy process while maintaining the super...
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JP2001179631A |
To provide a satisfactory antibacterial property by forming a surface layer containing free Cu or Ag on an ordinary austenitic stainless steel having Cu or Ag content in the inevitable range of impurities. The austenitic stainless steel ...
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JP2001181792A |
To provide a steel wire rod and a steel wire, having ≤0.30 mm diameter deviation after straightening into a straight bar and excellent in cold forgeability, and to provide a method for manufacturing the steel wire. The steel wire rod h...
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JP2001179632A |
To easily grant local surface hardening and residual stress to a peened material. A peening device and method comprises using a peening punch 1, rotation driving means 3 for rotationally driving the punch 1 and punching means 4 for apply...
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JP2001152247A |
To produce a magnetic functionally gradient material in which martensitic transformation is caused in a gradient manner by applying stainless steel with strain in a gradient manner and to optimumly control the magnetic gradient.Wedgy aus...
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JP3173900B2 |
PURPOSE: To suppress the generation of cracks in the longitudinal direction in the process of a twisting test by subjecting a drawn steel wire having a specified compsn. to skin pass rolling and bending. CONSTITUTION: A steel wire having...
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JP3171802B2 |
To prevent the development of sticking of broken shot balls and crack-like recession with injection onto the peripheral surface of a cooling roll, in the case of working the recessions with shot-blast onto the peripheral surfaces of the ...
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JP3173756B2 |
PURPOSE: To produce a high strength coil spring in which breaking is difficult to occur and excellent in fatigue resistance by subjecting a cold drawn wire rod having a specified compsn. constituted of a metallic group of C, Si, Mn or th...
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JP3171215B2 |
PURPOSE: To provide an inexpensive material as the material for an automotive exhaust gas system by improving the corrosion resistance of an aluminum-plated steel sheet even at the time of using a steel sheet having a componental compsn....
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JP3170615B2 |
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JP2001123224A |
To provide a method for producing high strength and high toughness non-heattreated parts having proof stress of ≥550 MPa, yiel ratio of ≥0.85 and impact value of ≥100 J/cm2 in a Charpy impact test at room temperature using a JIS No...
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JP3160514B2 |
To make the columnar crystals of weld metal finer and to improve an ultrasonic transmission characteristic by subjecting the weld metal during welding by each layer to peening and subjecting the weld metal to a soln. heat treatment after...
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JP3162104B2 |
PURPOSE:To execute a residual stress improvement by striking the surface of a metallic material by the impact of the cavitation generated by a water jet under water or the underwater environment created in the atm. air, thereby imparting...
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JP3158741B2 |
PURPOSE: To prevent the oxidation in micro porosities as the coarse structural part in the core part of a cast slab poured by executing rolling reduction to the cast slab drawn out from a casting mold at the position having a specified s...
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JP3157889B2 |
PURPOSE: To produce a high-strength hot-rolled steel sheet excellent in corrosion resistance and fatigue characteristic at the weld zone by applying a strain of specified elongation percentage to a steel sheet having specified contents o...
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JP3154229B2 |
To manufacture a vehicle member at low costs with high productivity by forming the teeth part of a gear or the like or the contacting part of a sliding surface or the like in the outer periphery part of the stock or the inner periphery p...
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JP2001082518A |
To give higher strength to a coil spring by enhancing fatigue resistance of the coil spring, by specifying a compressed residual stress from the surface of the coil spring till a specific depth and the surface roughness of the coil, as f...
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JP2001071008A |
To provide a simulation test method to correctly understand the deformation behavior such as the load characteristic, the change in shape and the metal flow, and the deformed shape taking into consideration the work hardening of steel by...
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JP2001062729A |
To escape the danger of environmental pollution or the like, reduce manufacturing cost by reducing equipment cost or the like, and also, cure a valve head part all the more. An engine valve molded unit is formed out of forged molding, he...
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JP3139876B2 |
PURPOSE: To impart high tensile strength, high yield strength and high toughnee to non-refining steel by specifying the contents of C, Si, Mn, Cr, S, V and N in steel and specifying the carbon equivalent and the value of a bainite transf...
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JP2001049337A |
To realize the increase of the stress of a spring by executing tempering at a specified temp. after quenching and executing shot peening in the subsequent stage in such a manner that the maximum value of compressive residual stress in th...
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JP3127081B2 |
PURPOSE: To prevent a weld crack from occurring, and to improve a secular deterioration resistance under high temperature and high-pressure water environment and under the high intensity of neutron irradiation by judging the corrosion re...
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JP2001009725A |
To provide a spring that is high in strength and in formability at the same time.This manufacturing method subjects a formed spring to nitriding and to a plurality of cycles of shot peening, the last one of which projects shot balls of a...
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JP2001011572A |
To obtain excellent contact fatigue life strength, in steel having a specified compsn., by controlling the thickness of an imperfect quenched layer, the compressive residual stress on the surface, the value β' obtd. by making the X-ray ...
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JP2001011578A |
To obtain excellent pitting fatigue strength, in steel having a specified compsn., by controlling the thickness of an imperfect quenched layer, the compressive residual stress on the surface, the value β' obtd. by making the X-ray diffr...
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JP3125434B2 |
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JP2000354965A |
To maintain fatigue fracture strength by maintaining compressed residual stress of shot peening applied before press-fitting of a gear, etc., to be press-fitted in other parts such as a shaft.Shot peening treatment is applied on a press-...
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JP3117601B2 |
PURPOSE: To produce high strength steel parts by less machining without subjecting the cast part to hardening and tempering, at the time of working a steel by cold or hot forging, by using a steel stock contg. a specified small amt. of B...
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JP2000345238A |
To produce a suspension spring having high fatigue resistance by combining a hot-setting process and a multi-stage shot-peening process and giving further high residual compression stress to the deep position from the surface and the pos...
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JP2000345292A |
To provide a nitrocarburizing steel reduced in hardness in a state of a stock for parts working, excellent in plastic workability and machinability, and having high core hardness after nitrocarburizing treatment and also to provide nitro...
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JP3113995B2 |
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JP3112195B2 |
PURPOSE: To inexpensively mass-produce a polished ferritic stainless steel sheet having attractive metallic luster and excellent in oxidation resistance. CONSTITUTION: The polished steel sheet can be produced by subjecting a ferritic sta...
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JP2000317838A |
To improve durability of springs that hardly improve in durability by nitriding. Springs which are applied low temperature annealing for removing macroscopic residual stress after cold forming, springs tempered after cold forming, or spr...
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JP2000313938A |
To provide a high strength spring excellent in the balance between strength and formability by combining a proper material with a working method suited to it. A steel which has a composition necessarily containing, by weight ratio, 0.45-...
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JP2000514717A |
A process for producing a shaped metallic article includes the steps of melting a metal alloy, reducing the temperature of the molten metal to the liquidus temperature, casting the molten metal at the liquidus temperature into a mould an...
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JP3105525B2 |
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JP2000297813A |
To improve the surface hardness of a shaft member without impairing corrosion resistance and to satisfactorily prevent the generation of dent scars by cold-machining an austenitic stainless steel raw material at a specific machining rati...
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JP2000282185A |
To produce steel parts having corrosion resistance of a certain degree, good in cold workability and warm forgeability, moreover having excellent machinability and whose surface hardness is controlled to ≥630 HV by induction hardening ...
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JP2000273539A |
To provide a method for producing an Fe-Ni-Co allay for electron gun parts improved in press punchability and low in thermal expansion. As to the method for producing an Fe-Ni-Co alloy for electron gun parts, the Fe-Ni-Co allay having a ...
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JP2000265249A |
To impart excellent intergranular corrosion resistance, on the surface of a structure composed of an Ni base or Fe base austenitic alloy contg. a specified amt. of Cr, by forming a layer in which Cr carbides are dispersed into austenitic...
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JP2000263337A |
To carryout a work hardening of a surface to be processed and to enhance a fatigue strength by generating a cavitation around a jet stream and applying a cavitation bubble to a workpiece. After a workpiece W is placed in a first containe...
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JP3087006B2 |
A process for fabricating a welded metallic duct assembly includes the steps of forming tubing from a flat form of a metal or alloy, annealing the tubing while applying radially directed pressure to a surface thereof, and then welding an...
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JP2000240669A |
To achieve high strength and reduction of weight of a power transmission shaft used in a constant velocity universal joint. This power transmission shaft 1 includes high-frequency quenched smooth parts 1b1-1b3 and a serration part 1a2. I...
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JP3080232B2 |
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JP2000220627A |
To provide a manufacturing method for a connecting rod for an internal combustion engine which can overcome the problems of sliding property such as a fretting corrosion, a scuffing, and a seizure, as well as can realize an extensive imp...
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JP3073734B1 |
[wrap up] [Task] An object of the present invention is to produce an Fe-Ni alloy that dramatically improves the uniformity of crystal orientation as compared with conventional materials, has excellent etching properties, and does not gen...
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JP3073930B2 |
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JP2000509440A |
A method of making a sintered article of powder metal having a carbon composition in the range of about 0.8% to 2.0% by weight, then spheroidizing the sintered article and then warm forming the sintered article at a temperature between 2...
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