| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 148328000 | Age or precipitation hardened or strengthed | 13 |
| 20090007992 | TOOL WITH A COATING - A coated metal article such as, e.g., a tool, which article comprises a body part comprising a substantially carbon-free precipitation-hardened iron-cobalt-molybdenum/tungsten-nitrogen alloy and carries a coating. The coating has been applied by a PVD method and/or a CVD method and comprises a substantially single-phase crystalline, cubic face-centered structure. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way. | 01-08-2009 |
| 20090078341 | STEEL PIPE AS FUEL INJECTION PIPE - To provide a steel pipe as a fuel injection pipe with high material strength, high internal pressure limit free from fatigue failure, prolonged fatigue life, and high reliability. A steel pipe as a fuel injection pipe of 500 N/mm | 03-26-2009 |
| 20090126834 | SPRING STEEL AND SPRING SUPERIOR IN FATIGUE PROPERTIES - Disclosed is a spring steel which contains, by mass, 1.2% or less C; 0.1% to 2% Mn; 0.2% to 3% Si; 0.0003% to 0.005% Al; to 8 ppm Li; 30 ppm or less (excluding 0 ppm) Ca; and 10 ppm or less (excluding 0 ppm) Mg. The steel contains oxide inclusions satisfying the following conditions (1) to (3) in a number of 1×10 | 05-21-2009 |
| 20090266451 | Ultra-High Strength Martensitic Alloy - An age hardenable martensitic steel alloy is disclosed. The alloy has the following composition in weight percent. | 10-29-2009 |
| 20100043924 | Local heat treatment for improved fatigue resistance in turbine components - A method for locally heat-treating a gas turbine engine superalloy article to improve resistance to strain-induced fatigue of the article is disclosed. The method comprises providing a gas turbine engine superalloy article having a gamma prime solvus temperature; and locally over aging only a selected portion of the article to locally improve fatigue resistance at the selected portion of the article, wherein the local over age cycle includes heating at about 843° C. for about 3 to 4 hours. | 02-25-2010 |
| 20100186855 | Steel and processing method for the manufacture of high strength, fracture-splittable machinery components - The invention relates to a steel and a processing method for high-strength fracture-splittable machine components that are composed of at least two fracture-splittable parts. The steel and method are characterized in that the chemical composition of the steel (expressed in percent by weight) is as follows: 0.40%≦C≦0.60%; 0.20%≦Si≦1.00%; 0.50%≦Mn≦1.50%; 0%≦Cr≦1.00%; 0%≦Ni≦0.50%; 0%≦Mo≦0.20%; 0%≦Nb≦0.050%; 0%≦V≦0.30%; 0%≦Al≦0.05%; 0.005%≦N≦0.020%, the rest being composed of iron and smelting-related impurities and residual matter. | 07-29-2010 |
| 20110041961 | HARDENED MARTENSITIC STEEL, METHOD FOR PRODUCING A COMPONENT FROM THIS STEEL AND COMPONENT OBTAINED IN THIS MANNER - The invention relates to steel which is characterized by the following composition as expressed in percentages by weight: —C=0.18 0.30%, —Co=5-7%, —Cr=2-5%, —Al=1-2%, —Mo+W/2=1-4%, —V=trace 0.3%, —Nb=trace 0.1%, —B=trace-50 ppm, —Ni=10.5-15% with Ni≧7+3.5 Al, —Si=trace 0.4%, —Mn=trace 0.4%, —Ca=trace-500 ppm, —Rare earths=trace-500 ppm, —Ti=trace-500 ppm, —O=trace-200 ppm if the steel is obtained by means of powder metallurgy or trace-50 ppm if the steel is produced in air or under a vacuum from molten metal, —N=trace-100 ppm, —S=trace-50 ppm, —Cu=trace-1%, and —P=trace-200 ppm, the remainder including iron and the inevitable impurities resulting from production. The invention also relates to a method of producing a part from said steel and to the part thus obtained. | 02-24-2011 |
| 20110232806 | SIDE RAIL - A side rail made of sheet steel includes a first region which underwent heat treatment, a second region which is not heat-treated, and a transition zone between the first and second regions. The transition zone is hereby defined by a width which is smaller than or equal to 50 mm. An additional component can be coupled to the side rail to form a side rail assembly. | 09-29-2011 |
| 20130199674 | ULTRA HIGH STRENGTH STEEL HAVING GOOD TOUGHNESS - Embodiments of the present disclosure comprise carbon steels and methods of manufacture. In one embodiment, a double austenizing procedure is disclosed in which a selected steel composition is formed and subjected to heat treatment to refine the steel microstructure. In one embodiment, the heat treatment may comprise austenizing and quenching the formed steel composition a selected number of times (e.g., 2) prior to tempering. In another embodiment, the heat treatment may comprise subjecting the formed steel composition to austenizing, quenching, and tempering a selected number of times (e.g., 2). Steel products formed from embodiments of the steel composition in this manner (e.g., seamless tubular bars and pipes) will possess high yield strength, at least about 175 ksi (about 1200 MPa) while maintaining good toughness. | 08-08-2013 |
| 20130327446 | MARAGING STEEL - The present invention provides a maraging steel containing: 0.10≦C≦0.30 mass %, 6.0≦Ni≦9.4 mass %, 11.0≦Co≦20.0 mass %, 1.0≦Mo≦6.0 mass %, 2.0≦Cr≦6.0 mass %, 0.5≦Al≦1.3 mass %, and Ti≦0.1 mass %, with the balance being Fe and unavoidable impurities, and satisfying 1.00≦A≦1.08, in which A is 0.95+0.35×[C]−0.0092×[Ni]+0.011×[Co]−0.02×[Cr]−0.001×[Mo], where [C] indicates a content (mass %) of C, [Ni] indicates a content (mass %) of Ni, [Co] indicates a content (mass %) of Co, [Cr] indicates a content (mass%) of Cr, and [Mo] indicates a content (mass%) of Mo, respectively, The maraging steel has a tensile strength of 2,300 MPa or more and is also excellent in the toughness/ductility and fatigue characteristics. | 12-12-2013 |
| 20150068647 | HOT WORKED STEEL AND TOOL MADE THEREWITH - A hot worked matrix steel consisting of (in weight-%) 0.60-0.85 C, 0.05-0.5 Si, ≦0.5 (Si+Al), 0.1-2.0 Mn, 4.5-5.5 Cr, 1.5-2.6 Mo, ≦1.0 W, 1.5-2.6 (Mo+W/2), 0.42-0.65 V, ≦0.1 Nb, ≦0.1 Ti, ≦0.1 Zr, ≦2.0 Co, ≦2.0 Ni, ≦0.003 S, optionally, up to 30 ppm B, balance iron and unavoidable impurities. The steel after hardening and tempering at 520-600° C. (2×2 h) has a hardness of 57-63 HRC and an un-notched impact energy in the transverse direction of 20-100 J. The steel consists of tempered martensite. The steel contains 1.04 vol. % or less of primary precipitated vanadium carbides. The steel is void of primary carbides other than primary precipitated vanadium carbides. | 03-12-2015 |
| 20160122841 | SOFT NITRIDED INDUCTION HARDENED STEEL PART - A soft nitrided induction hardened steel part which is excellent in bearing fatigue strength comprised of a predetermined chemical composition wherein a dissolved N concentration from the surface to 0.2 mm depth is 0.05 to 1.50%, a Vicker's hardness from the surface to 0.2 mm depth after tempering at 300° C. is Hv600 or more, and t/r≦0.35 when an effective hardened layer depth “t” is 0.5 mm or more and a radius of a breakage risk site or half of the thickness is “r” (mm). | 05-05-2016 |
| 20160201175 | AGE-HARDENABLE STEEL | 07-14-2016 |
