| DAIDO STEEL CO., LTD. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110132138 | NITROCARBURIZED CRANKSHAFT MEMBER AND STEEL FOR NITROCARBURIZED CRANKSHAFTS - A nitrocarburized crankshaft member made of a steel that includes C in an amount by weight of 0.25 to 0.32% as a required element and an optional element that may be included, and Fe and inevitable impurities in a remaining portion. The steel-made crankshaft member mainly includes ferrite and perlite, wherein at least a portion of the steel surface thereof having a ferrite surface area of 50% or greater is imparted with a nitrocarburized hard layer. The nitrocarburized hard layer includes a surface compound layer suppressed to a thickness of 10 to 35 μm, and a nitrogen diffusion zone below the surface compound layer having a diffusion depth of 700 μm or greater. The steel includes C, Si, Mn, Cu, Ni, and Cr as the required elements and Mo, N, s-Al, and Ti as the optional elements. | 06-09-2011 |
| 20100243110 | Weldable steel of high strength and high toughness, and method of producing members using the same - Disclosed are a weldable steel of high strength and high toughness and a method of producing members of machine parts. The steel consists essentially of, by weight %, C: 0.10-0.16%, Si: 0.05-0.50%, Mn: 1.3-2.3%, Cu: up to 0.5%, Ni: up to 0.5%, Cr: up to 0.5%, Mo: up to 0.3% and Ti: 0.025-0.035%, and the balance of Fe and inevitable impurities, and satisfying the condition that the weld-cracking susceptibility, Pcm, defined by the formula 1A below is less than 0.35, and the condition that the manganese equivalent, Mneq, defined by the formula 2A below is larger than 2.0. | 09-30-2010 |
| 20100172783 | Material for Anisotropic Magnet and Method of Manufacturing the same - A material for anisotropic magnet, comprising,
| 07-08-2010 |
| 20100139451 | CRANKSHAFT MEMBER AND MANUFACTURING METHOD THEREOF - The invention relates to a crankshaft member having high fatigue strength and good bending correctability, and its method of manufacture. The steel made crankshaft member mainly consists of a two-phase structure of ferrite and perlite. The steel includes C, Ni, Mn, and Cr as required elements and Si, Cu, Mo, Ti, V, Nb, Ca, and S as optional elements that may be included, in the amounts of C within the range of 0.20 to 0.50 wt %, Si within the range of 0 to 0.6 wt %, Mn within the range of 0.5 to 1.5 wt %, Cu within the range of 0 to 0.7 wt %, Ni within the range of 0.05 to 1.5 wt %, Cr within the range of 0.05 to 0.45 wt %, and Mo within the range of 0 to 0.5 wt % to satisfy the condition 115≧70 C+8 Si+23 Mn+11 Cu+128 Cr+83 Mo≧50. A portion of the member surface is provided at least with a hard nitride layer having an average hardness within the range of 300 to 450 HV. Lamellar spacing of the perlite is 0.3 μm or less. | 06-10-2010 |
| 20090218012 | MATERIAL FOR MAGNETIC ANISOTROPIC MAGNET - A material for magnetic anisotropic magnet, comprising (1) a Pr-T-B—Ga-based composition containing Pr: 13.0 to 15.0 atomic percent, B: 4.5 to 6.5 atomic percent, Ga: 0.1 to 0.7 atomic percent, and the balance of. T and inevitable impurities, wherein T is obtained by substituting Co for Fe or a portion of Fe, (2) the material for magnetic anisotropic magnet is obtained by rapidly-cooling a molten alloy having the composition, pulverizing the ribbon obtained by the rapid-cooling, cold-forming the alloy powder obtained by the pulverizing, hot-forming the cold-formed body, and performing hot plastic working to the hot-formed body, and (3) the degree of magnetic orientation of the material for magnetic anisotropic magnet, which is defined by remanence (Br)/saturation magnetic flux density (Js), is 0.9 or more. | 09-03-2009 |
| 20090212770 | THIN FILM MAGNETIC SENSOR - The thin film magnetic sensor comprising a GMR film having a Giant Magneto-Resistance effect; and thin film yokes formed of a soft magnetic material connected electrically to both ends of the GMR film;
| 08-27-2009 |
