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JP4719320B2 |
The present invention provides a steel wire, including chemical components of: C: 0.7-1.2 mass%; Si: 0.05-2.0 mass%; and Mn: 0.2-2.0 mass%, with a balance including Fe and inevitable impurities, in which the steel wire has a pearlite str...
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JP4711403B2 |
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JP2011517729T |
The present invention is mass % and is 0.3*0.5% and Si from trace about C, A maximum of 1.5%They are 0.01*0.2% and Cr about 0.2*1.5% and S in Mn, 1.5*4%They are 1.5*5% and Mo about nickel, 0.5*2% (at least one of them can be replaced by ...
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JP4703005B2 |
The invention relates to a steel with a high wear resistance, high hardness and good notched bar impact strength, useful for the manufacture of products, in the use of which at least some of the features are desirable, preferably for the...
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JP2011111637A |
To provide a treatment method which can enhance a fatigue strength of a steel material.This treatment method includes: a step (S1) of quenching the steel material which contains 0.15-0.70% carbon; a heat treatment step (S2) of tempering ...
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JP4699041B2 |
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JP2011105998A |
To provide a treatment method for steel which improves a fatigue strength of the steel.The treatment method for the steel comprises: a process (S1) of applying a quenching treatment to the steel having 0.15-0.70% carbon content; a heat t...
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JP4691240B2 |
A structure of a two-phase steel is controlled by subjecting a steel containing C: 0.05-0.80 mass % to a strain work in a true strain quantity of not less than 0.1 at a temperature zone of alpha-phase or gamma-phase and then applying a m...
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JP4690895B2 |
To provide an article having long fatigue lifetime by selectively increasing the residual compressive stress in the maximum principal stress in the surface of a work in the laser peening method of a metal component or the like with the c...
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JP4687616B2 |
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JP4674843B2 |
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JP4655541B2 |
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JP4650981B2 |
A mask (10) for masking a corner (28) of a metal component (20) during peening. The component (20) has a first surface (22) defining an opening (24) in the component (20) and a second surface (26) intersecting the first surface (22) of t...
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JP4640628B2 |
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JP4635708B2 |
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JP2011011251A |
To provide a cold drawing method for a pipe, wherein the consumption unit of a tool and the productivity in drawing are improved, and the production cost is drastically reduced.This invention relates to the cold drawing method for a pipe...
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JP4616772B2 |
There are provided an austenitic stainless steel having high stress corrosion crack resistance, characterized by containing, in percent by weight, 0.030% or less C, 0.1% or less Si, 2.0% or less Mn, 0.03% or less P, 0.002% or less S, 11 ...
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JP2011006781A |
To provide an automobile undercarriage component having excellent low cycle fatigue properties, and to provide a method for producing the same.In the automobile undercarriage component, ≥80% of the microstructure of a steel member comp...
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JP2011001965A |
To provide a steel ball which realizes the excellent resistances to foreign matter and indentation and reduces bearing assembly flaw and handling scratch without carrying out special surface treatment as a steel ball for a rolling bearin...
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JP4588030B2 |
A high strength spring steel of this invention is characterized in containing, in percent of mass, of C: 0.36-0.48%; Si: 1.80-2.80%; Mn: 0.20-1.40%; P: 0.015% or less; S: 0.010% or less; Cu: 0.10-0.50%; Ni: 0.10-2.00%; Cr: 0.05-1.20%; s-...
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JP4586938B2 |
In this method, the inner surface of a metal pipe containing, by mass percent, 20 to 55% of Cr and 20 to 70% of Ni is subjected to mechanical treatment, the metal pipe is subjected to heat treatment such as to be held in a temperature ra...
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JP4578918B2 |
To provide a residual stress part reduction method and a residual stress part reduction device capable of carrying out more precise work on a part of a metal part and carrying out extremely favorable treatment even for treatment where co...
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JP2010247213A |
To enable simple, safe and sure laser peening work even when mechanical components or steel structures under or after construction are worked on the site, since no preparation is needed such as immersing a workpiece in water or coating i...
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JP4569335B2 |
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JP4559933B2 |
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JP2010222632A |
To provide an Fe-Ni-Co-Ti based alloy which is a crystalline metallic material and yet exhibits high strength close to that of an amorphous metallic material.An alloy comprises nickel (Ni) of 15 to 25 atom%, cobalt (Co) of 25 to 44 atom%...
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JP4555749B2 |
To provide a high strength bolt having satisfactory delayed fracture resistance, and having a strength of ≥1,500 MPa, and to provide a method for improving its delayed fracture resistance. The high strength bolt having excellent delaye...
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JP4556334B2 |
Disclosed is a non-heat treated steel for soft niriding, which can provide forged parts exhibiting equal to or larger than the limit strain at which cracks occur in straightening by bending and equal to or larger than the fatigue strengt...
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JP4558183B2 |
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JP4558109B2 |
Producing a grain oriented electrical steel having improved magnetic properties comprises: (a) providing a hot processed strip having an austenite volume fraction and an isomorphic layer on each surface strip, where the strip comprises 2...
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JP4551694B2 |
Disclosed is a method wherein when a steel sheet is subjected to warm or hot forming to produce a formed product by drawing with a punch and a die, the steel sheet is formed while the forming start temperature is controlled in accordance...
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JP2010209965A |
To provide a cage for a rolling bearing excellent in wear resistance and fatigue strength and excellent in durability even if used in a severe condition.Steel is molded into a cage shape for a thrust roller bearing by press molding or th...
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JP4539559B2 |
An austenitic stainless steel for a hydrogen gas, which has a chemical composition, in mass %, that C: 0.10 % or less, Si: 1.0 % or less, Mn: 0.01 to 30 %, P: 0.040 % or less, S: 0.01 % or less, Cr: 15 to 30 %, Ni: 5.0 to 30 %, Al: 0.10 ...
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JP4537649B2 |
A circularly welded joint featuring excellent fatigue strength obtained by welding the ends of two pieces of steel plates perpendicularly together and used for the welded structures such as buildings, ships, bridges, construction machine...
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JP4533613B2 |
Production of a hardened steel component comprises forming a semi-finished product made from air-hardened steel, cold forming the product to form the finished molded component, and hardening the component by heat treating.
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JP4519053B2 |
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JP2010163689A |
To provide an oil-tempered wire which has both of high fatigue strength and toughness after nitriding treatment; a method for manufacturing the same; and a spring manufactured by using the oil-tempered wire. The oil-tempered wire has a t...
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JP4505779B2 |
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JP4507640B2 |
To provide a high strength thin steel sheet excellent in fatigue strength and formability by satisfying both of the fatigue characteristic and the formability. In the high strength thin steel sheet provided with simple state surface form...
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JP4504736B2 |
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JP4499925B2 |
Blank for a gun barrel, consisting of a steel bar, which bar, in one or more hot working steps, has been repeatedly wrung about its own longitudinal axis.
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JP4502646B2 |
Disclosed is a high-strength hot-rolled steel sheet containing C in a range of 0.03 to 0.15 mass %, Mn in a range of 0.5 to 2 mass %, and Al in a range of 0.01 to 0.1 mass %, respectively, while controlling S to not more than 0.02 mass %...
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JP2010142899A |
To provide a stress improvement processing method finding changes in compressive residual stress of an apparatus to be processed according to the environment of the apparatus and surely providing the compressive residual stress to the ap...
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JP2010144192A |
To provide a shot for surface modification which forms a compressive stress layer and a corrosion resistance improvement layer on the surface side of the material to be worked so as to improve the corrosion resistance of the material to ...
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JP4490874B2 |
To provide a component made of steel having a spline excellent in fatigue resistance, and in which sufficient compressive residual stress can be applied to the edge part of the spline, and to provide a method for improving the fatigue st...
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JP4490608B2 |
A repair method for a structure having an open flaw (4) in a welding heat affected portion (3), including, removing at least a part of the open flaw and thereby forming a concave portion (8) in the welding heat affected portion, forming ...
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JP2010138460A |
To provide a nitriding quenching method for carrying out nitriding quenching on a steel member, by which nitriding quenching can be carried out to a desired depth at a desired site of the steel member while suppressing variation in the n...
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JP4488347B2 |
To provide a comparatively inexpensive plate spring capable of improving fatigue strength, yielding strength, shape precision such as camber (curvature), and corrosion resistance by quenching a surface part again in addition to heat trea...
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JP4474731B2 |
To provide an electric resistance welded steel tube excellent in formability at hydroforming and having strain aging characteristic. A hot rolled or cold rolled hoop stock, which has a composition consisting of 0.01-<0.05% C, <=1.0% Si, ...
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JP4474728B2 |
To provide a technique for manufacturing a resistance welded steel tube for structural use, suitably used for automobile structural member, under carriage member, or the like, and particularly excellent in workability at hydroforming (hy...
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