KAB, Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Patent applications |
Patent application number | Title | Published |
20090282950 | PROCESS FOR PRODUCING METALLIC IRON - A method for manufacturing metallic iron from a raw material mixture containing a carbonaceous reducing agent and an iron oxide-containing material, has a step of determining a target temperature of initial molten slag formation corresponding to a predetermined target carbon concentration in the metallic iron, the initial molten slag containing a gangue component, an unreduced iron oxide, and an ash component of the carbonaceous reducing agent, and being first produced in the raw material mixture by heating thereof; a step of preparing the raw material mixture producing a composition of the initial molten slag corresponding to the target temperature; and a step of heating the raw material mixture to reduce and melt the raw material mixture and to produce the initial molten slag. By this manufacturing method, metallic iron having a target carbon concentration can be efficiently manufactured. | 11-19-2009 |
20090136887 | ROTARY HEARTH FURNACE - PROBLEM TO BE SOLVED: To provide a rotary hearth furnace which has a simple furnace structure in which the furnace is not damaged even if the furnace is operated for a long term while presenting general equations capable of adequately determining a thermal expansion margin in the rotary hearth furnace. | 05-28-2009 |
20090126449 | ROUGHLY SHAPED MATERIAL FOR FORGING, FORGED PRODUCT, APPARATUS FOR MOLDING ROUGHLY SHAPED MATERIAL FOR FORGING, AND METHOD OF MOLDING ROUGHLY SHAPED MATERIAL FOR FORGING - A forging stock formed by extrusion such that its cross section perpendicular to the direction of extrusion varies along the direction of extrusion. The forging stock is cut into portions in the direction of extrusion to be forged individually, each cut portion having cross sections varying along the direction of extrusion. Each cut portion includes a pair of first parallel parts at both ends thereof in the direction of extrusion, a second parallel part, which is between the first parallel parts, and which differs in thickness from said first parallel parts, and oblique parts each of which is between the first parallel parts and the second parallel part. | 05-21-2009 |
20090056836 | HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT WORKABILITY - According to the present invention, there is provided a high strength steel sheet, which has, for example, a tensile strength of 590 to 980 MPa or more, which has favorable workability, and which is useful for an automobile, etc. The high strength steel sheet of the present invention comprises 0.03 to 0.20% C (% by mass in chemical compositions; hereafter, the same holds true), 0.50 to 2.5% Si, 0.50 to 2.5% Mn, and further, preferably 0.02 to 0.2% Mo. Moreover, its metal structure includes ferrite and low temperature transformation phase. The mean grain size of the low temperature transformation phase is 3.0 μm or less. Further, grains whose size is 3.0 μm or less occupy 50% or more by area ratio of the low temperature transformation phase, and an average aspect ratio of the low temperature transformation phase is 0.35 or more. | 03-05-2009 |
20090047169 | ROLLED MATERIAL FOR FRACTURE SPLIT CONNECTING ROD EXCELLING IN FRACTURE SPLITTABILITY, HOT FORGED PART FOR FRACTURE SPLIT CONNECTING ROD EXCELLING IN FRACTURE SPLITTABILITY, AND FRACTURE SPLIT CONNECTING ROD - The present invention provides a rolled material having excellent fracture splitting characteristics and suitable for the manufacture of a connecting rod in which a through-hole section for assembly in a crankshaft is fracture split in substantially semicircles. Prescribed components are contained, an average aspect ratio of a sulfide-based inclusion as observed in a D/4 portion (D is the diameter of the rolled material) in a cross-section parallel to a longitudinal direction of the rod-shaped rolled material is not more than 10.0, a Pc indicated in Equation (1) below is between 0.41 and 0.75, and a Veq indicated in Equation (2) below is not less than 0.18 mass % | 02-19-2009 |
20090038365 | PRESS FORMING METHOD FOR ALUMINUM ALLOY SHEET AND PRESSING DEVICE - The invention provides a press forming method of an aluminum alloy sheet and a press device capable of forming a large panel which is an automobile body outer panel such as a luggage outer panel and the like and is of a shape difficult in forming. In a method of press forming of the aluminum alloy sheet | 02-12-2009 |
20090007998 | WIRE WITH EXCELLENT SUITABILITY FOR DRAWING AND PROCESS FOR PRODUCING THE SAME - A hot-rolled wire rod excelling in wire drawability is provided, in which breakage can be suppressed even in heavy work from a large diameter. A hot-rolled wire rod contains C: 0.35 to 0.65% (percent by mass, hereinafter expressed as well), Si: 1.4 to 3.0%, Mn: 0.10 to 1.0%, Cr: 0.1 to 2.0%, P: 0.025% or less (exclusive of 0%), S: 0.025% or less (exclusive of 0%), N: 0.006% or less (exclusive of 0%), Al: 0.1% or less (exclusive of 0%), and O: 0.0030% or less (exclusive of 0%), with the remnant consisting of Fe and inevitable impurities; wherein the content of hydrogen in steel is 2.50 ppm (ppm by mass, hereinafter expressed as well) or less, and hardness (HV) is 460×C | 01-08-2009 |
20090000705 | Aluminum Alloy Forging Member and Process for Producing the Same - The present invention provides an aluminum alloy forging material having enhanced strength, toughness, and corrosion resistance, and a method of producing the material. An aluminum alloy forging material | 01-01-2009 |