Patent application number | Description | Published |
20080233456 | Metallic Material for Conductive Member, Separator for Fuel Cell Using the Same, and Fuel Cell Using the Separator - Provided are: a metallic material for conductive member, having good corrosion resistance and small contact resistance; a separator for a proton-exchange membrane fuel cell using the metallic material; and a proton-exchange membrane fuel cell using the separator. The metallic material has 0.3 μm or less of mean spacing of local peaks of the surface roughness profile. | 09-25-2008 |
20090004040 | Ferritic Stainless Steel Sheet for Raw Material Pipe for Bellows Pipe - A ferritic stainless steel sheet for forming a raw material pipe for bellows pipe is excellent in formability and high-temperature properties (high-temperature salt corrosion resistance and high-temperature fatigue properties). Specifically, the ferritic stainless steel sheet for forming a raw material pipe for bellows pipe contains 0.015% by mass or less of C, 1.0% by mass or less of Si, 1.0% by mass or less of Mn, 0.04% by mass or less of P, 0.010% by mass or less of S, 11% to 19% by mass of Cr, 0.015% by mass or less of N, 0.15% by mass or less of Al, 1.25% to 2.5% by mass of Mo, 0.3% to 0.7% by mass of Nb, 0.0003% to 0.003% by mass of B, and the balance being Fe and incidental impurities. In the ferritic stainless steel sheet for forming a raw material pipe for bellows pipe, preferably, the average crystal grain diameter D of the steel sheet is 35 μm or less, and alternatively, the surface roughness Ra of the steel sheet is 0.40 μm or less. | 01-01-2009 |
20090068490 | Ferritic stainless steel sheet for use in raw material pipe for forming bellows pipe - A ferritic stainless steel sheet for use in raw material pipes for forming bellows pipes has excellent formability. More specifically, the ferritic stainless steel sheet contains 10% to 25% by mass of Cr and has a yield stress in the range of 300 to 450 MPa and the product of the yield stress and the uniform elongation properties of at least 5200 (MPa·%). Preferably, the ferritic stainless steel sheet for use in raw material pipes for forming bellows pipes has an average crystal grain size D of 35 μm or less or a surface roughness of 0.40 μm or less as determined by Ra. | 03-12-2009 |
20110024002 | METHOD OF PROCESSING METALLIC MATERIAL FOR A CONDUCTIVE MEMBER CELL AND A METHOD OF ADJUSTING SURFACE ROUGHNESS OF THE METALLIC MATERIAL - A method of processing a metallic material includes immersing ferritic stainless steel or austenitic stainless steel in an acid solution containing hydrochloric acid in an amount of two times or more relative to the concentration of nitric acid or an acid solution containing hydrofluoric acid in an amount of one and a half times or more relative to the concentration of nitric acid to adjust surface roughness of the metallic material. | 02-03-2011 |
20110030851 | LOW-CARBON MARTENSITIC CHROMIUM-CONTAINING STEEL - A material for brake discs has temper softening resistance sufficient to maintain a hardness of HRC 31 or more after tempering at 700° C. for one hour. The low-carbon martensitic chromium-containing steel contains 0.02% to 0.10% of carbon and 0.02% to 0.10% of nitrogen, the total content of carbon and nitrogen being 0.08% to 0.16%; 0.5% or less of silicon; 0.1% or less of aluminum; 0.3% to 3.0% of manganese; 10.5% to 13.5% of chromium; 0.05% to 0.60% of niobium and 0.15% to 0.80% of vanadium, the total content of niobium and vanadium being 0.25% to 0.95%; 0.02% to 2.0% of nickel; and 1.5% or less of copper, and has an Fp value (=−230C+5Si−5Mn−6Cu+10Cr−12Ni+32Nb+22V+12Mo+8W+10Ta+40Al−220N) of 80.0 to 96.0, a hardness after quenching of HRC 31 to 40, and a hardness after tempering at 700° C. for one hour of HRC 31 or more. | 02-10-2011 |
20130196172 | STAINLESS STEEL FOIL AND CATALYST CARRIER FOR EXHAUST GAS PURIFYING DEVICE USING THE FOIL - A stainless steel foil contains, in percent by mass, 0.05% or less of C, 2.0% or less of Si, 1.0% or less of Mn, 0.003% or less of S, 0.05% or less of P, 25.0% to 35.0% of Cr, 0.05% to 0.30% of Ni, 3.0% to 10.0% of Al, 0.10% or less of N, 0.02% or less of Ti, 0.02% or less of Nb, 0.02% or less of Ta, 0.005% to 0.20% of Zr, 0.02% or less of Ce, 0.03% to 0.20% of REM excluding Ce, 0.5% to 6.0% in total of at least one of Mo and W, and the balance being Fe and incidental impurities. | 08-01-2013 |
Patent application number | Description | Published |
20110008200 | HEAT-RESISTANCE FERRITIC STAINLESS STEEL - Ferritic stainless steel is excellent in terms of both oxidation resistance and thermal fatigue resistance without adding expensive elements, such as Mo or W. The ferritic stainless steel, contains: C: 0.015 mass % or lower, Si: 1.0 mass % or lower, Mn: 1.0 mass % or lower, P: 0.04 mass % or lower, S: 0.010 mass % or lower, Cr: 16 to 23 mass % or lower, N: 0.015 mass % or lower, Nb: 0.3 to 0.65 mass %, Ti: 0.15 mass % or lower, Mo: 0.1 mass % or lower, W: 0.1 mass % or lower, Cu: 1.0 to 2.5 mass %, Al: 0.2 to 1.5 mass %, and the balance of Fe and inevitable impurities. | 01-13-2011 |
20110115704 | SCREEN DISPLAY CONTROL DEVICE AND APPARATUS HAVING THE SAME - There is disclosed a device which realizes a shortcut function without providing any key exclusively used for the shortcut function. When a home key is operated in a state where a lower screen at a lower position of a hierarchical structure is displayed, a home screen at an upper position of the hierarchical structure is displayed, and data to specify the lower screen when the home key is operated are stored in association with the home key. When the home key is operated in a state where the home screen is displayed, the lower screen is displayed based on the stored data to take a shortcut to the lower screen from the home screen. | 05-19-2011 |
20110123387 | FERRITIC STAINLESS STEEL EXCELLENT IN HEAT RESISTANCE AND TOUGHNESS - A ferritic stainless steel excellent in thermal fatigue resistance and oxidation resistance and also having toughness equivalent to or higher than that of Type 429 does not need to add an expensive element such as Mo or W. Specifically, the ferritic stainless steel includes C: 0.015 mass % or less, Si: 0.5 mass % or less, Mn: 0.5 mass % or less, P: 0.04 mass % or less, S: 0.006 mass % or less, Cr: 16 to 20 mass %, N: 0.015 mass % or less, Nb: 0.3 to 0.55 mass %, Ti: 0.01 mass % or less, Mo: 0.1 mass % or less, W: 0.1 mass % or less, Cu: 1.0 to 2.5 mass %, Al: 0.2 to 1.2 mass %, and the balance of Fe and inevitable impurities. | 05-26-2011 |
20120020827 | FERRITIC STAINLESS STEEL WITH EXCELLENT HEAT RESISTANCE - A ferritic stainless steel contains no expensive elements such as Mo and W, is free from the oxidation resistance loss caused by addition of Cu, and thereby has excellent levels of oxidation resistance (including water vapor oxidation resistance), thermal fatigue property, and high-temperature fatigue property. The ferritic stainless steel contains, in mass %, C at 0.015% or less, Si at 0.4 to 1.0%, Mn at 1.0% or less, P at 0.040% or less, S at 0.010% or less, Cr at 16 to 23%, Al at 0.2 to 1.0%, N at 0.015% or less, Cu at 1.0 to 2.5%, Nb at 0.3 to 0.65%, Ti at 0.5% or less, Mo at 0.1% or less, and W at 0.1% or less, the Si and the Al satisfying a relation Si (%)≧Al (%). | 01-26-2012 |
20120125724 | STEEL SHEET FOR BRAKE DISC, AND BRAKE DISC - A steel sheet for a brake disc contains, on a mass percent basis, 0.02% or more and less than 0.10% C, 0.6% or less Si, more than 0.5% and 2.0% or less Mn, 0.06% or less P, 0.01% or less S, 0.05% or less Al, 11.0% to 13.5% Cr, 0.01% to 0.30% Ni, 0.10% to 0.60% Nb, 0.03% or more and less than 0.10% N, more than 0.0010% and 0.0060% or less B, and the balance being Fe and incidental impurities, and the steel sheet after quenching has a hardness of 32 HRC to 40 HRC on a Rockwell hardness scale C (HRC). | 05-24-2012 |
20130126052 | STRUCTURAL STAINLESS STEEL SHEET HAVING EXCELLENT CORROSION RESISTANCE AT WELD AND METHOD FOR MANUFACTURING SAME - A structural stainless steel sheet which can be manufactured at a low cost and with high efficiency, and possesses excellent welded-part corrosion resistance and a manufacturing method thereof are provided. The structural stainless steel sheet has a composition which contains by mass % 0.01 to 0.03% C, 0.01 to 0.03% N, 0.10 to 0.40% Si, 1.5 to 2.5% Mn, 0.04% or less P, 0.02% or less S, 0.05 to 0.15% Al, 10 to 13% Cr, 0.5 to 1.0% Ni, 4×(C+N) or more and 0.3% or less Ti, and Fe and unavoidable impurities as a balance, V, Ca and O in the unavoidable impurities being regulated to 0.05% or less V, 0.0030% or less Ca and 0.0080% or less O, wherein an F value expressed by Cr+2×Si+4×Ti−2×Ni−Mn−30×(C+N) satisfies a condition that F value≦11 and an FFV value expressed by Cr+3×Si+16×Ti+Mo+2×Al−2×Mn−4×(Ni+Cu)−40×(C+N)+20×V satisfies a condition that FFV value≦9.0. | 05-23-2013 |
20130177837 | METAL SHEET FOR SEPARATOR OF PROTON-EXCHANGE MEMBRANE FUEL CELL - An object is to provide at a low cost a metal sheet which can be ideally used as a separator of a proton-exchange membrane fuel cell and which has not only low contact resistance but also excellent durability in the environment in which the separator is used. Specifically, a metal sheet for a separator of a proton-exchange membrane fuel cell consists of a metal substrate on the surface of which a film made of a Sn alloy layer containing conducting particles is formed. | 07-11-2013 |
20130183190 | FERRITIC STAINLESS STEEL EXCELLENT IN HEAT RESISTANCE PROPERTY AND FORMABILITY - An object is to provide ferritic stainless steel excellent in heat resistance (oxidation resistance, a thermal fatigue property and a high-temperature fatigue property) and formability, while preventing a decrease in oxidation resistance due to Cu, without adding expensive chemical elements such as Mo and W. Specifically, ferritic stainless steel having a chemical composition containing, by mass %, C: 0.015% or less, Si: 0.4% or more and 1.0% or less, Mn: 1.0% or less, P: 0.040% or less, S: 0.010% or less, Cr: 12% or more and less than 16%, N: 0.015% or less, Nb: 0.3% or more and 0.65% or less, Ti: 0.15% or less, Mo: 0.1% or less, W: 0.1% or less, Cu: 1.0% or more and 2.5% or less and Al: 0.2% or more and 1.0% or less, while the relationship Si≧Al is satisfied, and the balance being Fe and inevitable impurities. | 07-18-2013 |
20130302718 | METHOD FOR PRODUCING STAINLESS STEEL FOR FUEL CELL SEPARATOR, STAINLESS STEEL FOR FUEL CELL SEPARATOR, FUEL CELL SEPARATOR, AND FUEL CELL - A stainless steel for use in a fuel cell separator is produced by subjecting stainless steel containing 16 mass % or more of Cr to electrolytic treatment and thereafter to immersion treatment in a solution containing fluorine. The electrolytic treatment is carried out by anodic electrolyzation or by a combination of anodic electrolyzation and cathodic electrolyzation, and an anodic electrolytic quantity Qa and a cathodic electrolytic quantity Qc preferably satisfy Qa≧Qc. The solution containing fluorine preferably has a temperature of 40° C. or higher, and hydrofluoric acid concentration [HF] (mass %) and nitric acid concentration [HNO | 11-14-2013 |
Patent application number | Description | Published |
20100226802 | FAN MOTOR AND BLOWER INCLUDING THE SAME MOTOR - A fan motor includes a pair of fans axially mounted to both sides of a rotary shaft of the motor. The motor includes an inner rotor placed inside a stator wound with windings and an outer rotor placed outside the stator. The motor thus has a dual-rotor structure where the inner rotor and the outer rotor are held such that both the rotors can rotate on the rotary shaft. | 09-09-2010 |
20130155552 | MOTOR DRIVE DEVICE - A motor drive device according to the present invention includes a motor having a rotor and a drive coil, a rotor position detector, a speed detector that converts position information into speed information, a direction detector that converts the position information into rotating direction information, and a drive unit that drives the motor. When any one of a case where a pulse of a rotor position detector signal is not inputted to the speed detector and another case where a change of rotating direction of the motor is detected by the direction detector in a state in which the rotor repeats a forward rotation and a backward rotation in a condition of the rotor is locked. | 06-20-2013 |
20130214817 | COMMAND DETECTING DEVICE - A command detecting device of the present invention includes a comparator, a detection state selector, a time detector, and a detection time switch. The comparator compares a command input from the outside with a certain voltage value and outputs its comparison result as a first state or a second output state. The detection state selector selects an output state that has been determined as a valid output state out of the two output states from the comparator. The time detector measures a duration time of the valid output state and switches the control command when the duration time reaches a given set time. The detection time switch switches the set time for the time detector. The output state selected as the valid output state by the detection state selector is switched by the control command. | 08-22-2013 |
20140306626 | MOTOR DRIVING DEVICE AND BRUSHLESS MOTOR - A motor driving device of the present invention is a motor driving device that incorporates so-called vector control of controlling a current applied to a motor winding in accordance with the position of a rotor. The motor driving device receives the input of a duty command value from a host controller via a command input port, for example. The motor driving device obtains a current command or a speed command as a command value such that the input duty command value is equal to the duty of a drive pulse output from an inverter. Then, the motor driving device performs vector control based on the obtained command value. | 10-16-2014 |
20150064023 | MOTOR CONTROLLER AND MOTOR CONTROL METHOD - A motor controller of the present invention comprises units which obtain information indicative of a motor speed (ω) and information indicative of motor torque (T), an air flow calculation section which calculates an air flow (Q) of a fan based on the motor speed (ω) and the motor torque (T); and a speed command generation section which generates a speed command (ω*) of a motor such that the air flow (Q) coincides with the predetermined air flow command (Q*). | 03-05-2015 |