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JP3395699 |
To provide a technique for melting a Ti-containing ferritic stainless steel without clogging of immersion nozzle and obtaining a cast slab free from surface defects. In a tundish, a slag composition is regulated so that it satisfies FeO+...
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JP3393706 |
PURPOSE: To provide a casting method, by which a high toughness Al alloy casting can be obtd. CONSTITUTION: At the time of casting the high toughness Al alloy casting, an Al alloy base stock containing Al and one or more kinds of alloy e...
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JP2003013172 |
To provide a high silicon cast iron superior in acid resistance, which not only possesses improved tensile strength compared to conventional high silicon cast iron, but also is inexpensive and mass producible, by improving the manufactur...
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JP2003001380 |
To provide a device for treating molten metal without generating a vortex even a rotation body is rotated at high speed.In the device for treating molten metal which is provided with: a molten metal storage tank 2; a vertical rotation sh...
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JP2002363683 |
To provide a method for inexpensively producing Bi-containing steel which contains no harmful element such as Pb, thereby is environmentally friendly, and and to obtain a material for Bi addition. The material for Bi addition consists of...
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JP2002365250 |
To provide a method for evaluating simply in a short time whether or not a material for semimelt molding is fully granulated with the dendrite structure broken and has high thixotropic properties in a semimelt state. The thixotropic prop...
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JP2002361378 |
To provide a continuous casting method for a casting little in a bubble defect capable of suppressing the clogging of an immersion nozzle, and preventing the bubble defect such as linear flaw and a bulging flaw generating in a steel mate...
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JP3378114 |
PURPOSE: To provide a method for adding the rare earth metal to demonstrate the safe and stable yield and the additive in adding the rare earth metal to the molten steel. CONSTITUTION: In the method for adding the rare earth metal to the...
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JP2002339034 |
To provide heat resistant spheroidal graphite cast iron which is an inexpensive material and from which an exhaust manifold and turbo-charger casing having excellent oxidation resistance and thermal cracking resistance even at a high tem...
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JP2002332516 |
To finely disperse a large amount of oxides in molten steel.In this method for dispersing a large amount of fine oxides in molten steel, a treatment where a deoxidizer is added to the molten steel and then oxygen of 5×10-3 to 1×10-1 kg...
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JP2002322509 |
To provide a method for treating molten steel excellent in a solidified structure by utilizing CaO with which the solidified structure of the molten steel is micronized at a low cost by adding Ca forming effective inoculation nuclei to t...
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JP2002322516 |
To provide a bubble injecting device which can be used without being cracked even under a severe condition of temperature change like a batch system, can prevent wear of a rotating body, and can maintain the performance of removing gas c...
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JP2002317221 |
To provide a tuyere structure capable of reducing dent wear of a sleeve and a porous refractory and back-attack wear of a peripheral refractory.In a gas blow tuyere of a molten metal vessel comprising a porous refractory (a) of a gas dis...
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JP2002301545 |
To provide a degassing apparatus with which development of inclusions such as oxides is suppressed and impurity gas consisting essentially of gaseous hydrogen is sufficiently removed and molten metal with reduced impurities can be obtain...
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JP2002301542 |
To provide a simulating method with which scattering state can be simulated at a good accuracy to an additive used for a casting process.Conditions for simulating flowing of molten metal, are inputted (S1) and a virtual grain having zero...
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JP2002285256 |
To obtain equipment for manufacturing a lead-calcium alloy by which the lead-calcium alloy can be manufactured without the addition of particular various devices.In manufacturing the lead-calcium alloy by adding a calcium material 10 to ...
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JP2002285220 |
To facilitate a dephosphorizing work and also, to shorten the treating time by reducing additional frequencies of oxidizing agent added while dividing into a plurality of times and further, to perform the dephosphorizing treatment withou...
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JP2002275575 |
To provide high strength spheroidal graphite cast iron which has tensile strength of ≥900 MPa without undergoing heat treatment.The high strength spheroidal graphite cast iron has a composition containing, by weight, 3.0 to 4.5% carbon...
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JP2002266017 |
To minimize the content of oxide nonmetallic inclusions whose existence is one of the main causes of the hindrance of the migration of magnetic domain walls.At deoxidation treatment, the following treatments are performed: primary deoxid...
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JP2002263808 |
To provide a method with which oxygen concentration in a tundish can quickly and efficiently be reduced in order to prevent air-oxidation to molten steel in the tundish, which is a main cause for lowering of cleanliness in the molten ste...
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JP3348836 |
To continuously cast a semi-solidified metal of high solid face ratio without installing a screw groove in a cooling.agitation basin by connecting a core having a screw groove on its outer face with a driving means; arranging an electrom...
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JP3348838 |
To stably cast semi-solidified metal having the wide range of solid phase ratio by arranging a heat-insulating member for covering a prescribed range of the outer peripheral surface of a cooling cylinder so as to be freely attached/detac...
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JP2002256331 |
To provide a method for melting molten low carbon steel of a blank for thin steel sheet with which the surface flaw can surely be prevented by reducing inclusion in the molten steel and also, preventing coagulated body so as to finely di...
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JP2002249817 |
To minimize the quantity of impurities in molten steel by keeping the time optimum for balancing the capturing of the refractory peeled off from a ladle in the molten steel due to drop of the temperature of the molten steel with the floa...
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JP2002249816 |
To provide a nozzle for top-blown lance with which the refining efficiency of blowing gas onto surface of molten metal is improved without lowering the lance height, and the refining reaction is promoted and exhaust gas having high CO co...
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JP2002248557 |
To provide a semi-solidified casting method and machine wherein a specific amount of part taken from semi-solidified metal is supplied into a molding machine.Semi-solidified metal M kept in a semi-solidifying unit 1 is charged from a dis...
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JP2002241861 |
To provide a rotating body for stirring molten metal with which erosion resistance is sufficiently secured and cracking caused by heat stress can be prevented.This rotating body is composed of a silicon nitride-sintered body consisting e...
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JP2002241825 |
To provide a method and a device for desulfurizing molten iron with which the same degree of desulfurizing efficiency as the conventional method can be secured even in the case of performing the desulfurization to the molten iron by stir...
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JP2002206113 |
To provide a graphite spheroidizing agent by which the additive quantity can be made to a value equal to or lower than that in the case of treatment using conventional graphite spheroidizing alloy by a sandwich method and further treatme...
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JP2002206112 |
To provide a compound graphite spheroidizing agent by which reaction can be held gentle and additive quantity can be made to a value equal to or lower than that in the case of treatment using conventional graphite spheroidizing alloy and...
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JP2002205146 |
To provide a cast slab providing fine solidified-structure without developing internal defect, such as internal crack, center segregation, center porosity, by stably forming solidified nuclei in molten steel containing much carbon, reduc...
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JP2002194419 |
To uniformly add bismuth which selectively restrains primary recrystallization in a grain oriented electrical steel sheet, into molten steel at good yield.Into the molten steel flow MF during shifting from coming-out of a ladle 1 to the ...
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JP2002187785 |
To provide a method of molding a porous plug which manufactures the porous plug advantageous for enhancing homogeneity in the axial length direction and exhibiting gas permeation performance, molding equipment for the porous plug and the...
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JP2002180121 |
To provide a method for pre-treating molten iron using metallic hydroxide with which the pre-treating cost of desiliconization and dephosphorization can be reduced by effectively utilizing the metallic hydroxide being waste for the remov...
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JP2002180124 |
To provide a method for refining molten metal at high efficiency, e.g. a method for promoting degassing reaction, slag-metal reaction, inclusion reducing treatment, etc., by proposing a new method for supplying gas by which fine bubble c...
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JP2002178105 |
To provide a free-cutting steel improving a yield of an added inorganic compound having smaller specific gravity than that of molten steel, such as oxide, sulfide, as a starting point of crack propagation when a steel material is machine...
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JP2002173718 |
To obtain a high purity aluminum alloy in which Ti, V and Zr as impurities in the molten metal of aluminum are reduced as much as possible by effectively using their reaction with B prior to segregation refining, and which is usable for ...
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JP3318606 |
To obtain an alloy casting having high mechanical strength by melting magnesium or an alloy thereof, removing oxide on the surface of the surface of the molten metal, thereafter adding a specified ratio of calcium thereto, executing mixi...
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JP3313220 |
PURPOSE: To obtain a slurry having fine and uniform non-dendritic crystal grains by rapidly cooling molten metal to half-solidified state while flowing in an inclining surface and thereafter, holding the slurry to the overheat condition....
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JP2002153944 |
To form a gushingly raising flow developed over a wide range of molten metal surface in the molten metal held in a cylindrical holding vessel.In a stirring method of the molten metal 3 held in the holding vessel 1 having the cylindrical ...
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JP2002153945 |
To provide a new control method of solid phase ratio instead of a method for controlling the solid phase ratio at some temperature.On and after developing the transformation point Pt, this solid phase ratio is controlled with a time. Tha...
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JP2002146447 |
To provide a degassing apparatus for non-ferrous metal with which molten metal is stirred with gas bubble and good degassing action is obtained and also, the maintenance of the apparatus is easily performed.This degassing apparatus is pr...
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JP2002146468 |
To obtain cast iron containing fine graphite and having high damping capacity without using a die nor adding Ti.The cast iron having high vibration damping capacity has a composition containing, by weight, 2.8 to 3.8% C, 1.0 to 2.7% Si, ...
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JP2002129224 |
To provide a plug for gas blowing with which the using limit can clearly be judged while securing the stable gas blowing and the safe operation can be achieved without missing the exchanging timing.In the plug for gas blowing having gas ...
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JP2002120050 |
To provide an oxygen-free copper wire rod with a belt and wheel type continuous casting and rolling method excellent in the productivity.In a method for producing the oxygen-free copper wire rod with the belt and wheel type continuous ca...
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JP2002115010 |
To provide a method for manufacturing a thin steel sheet from low carbon molten steel of the stock by which surface defects can securely be prevented by reforming the composition of alumina inclusions into another inclusion composition h...
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JP2002105575 |
To produce a magnesium matrix alloy composite material for plastic working excellent in plastic deformability and, a production method for a thin sheet material for plastic working.A magnesium matrix alloy (e.g. existing high-tensile mag...
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JP2002103007 |
To provide a method for continuously casting molten steel for rail by which internal defect is restrained by applying electromagnetic stirring to the molten steel and the deterioration of qualities, such as hardness, strength, wear resis...
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JP2002097509 |
To provide a method of graphite spheroidization for cast iron which is superior in a yield of Mg, in a safety, giving a good labor environment and inexpensive, using Mg as an additive for the graphite spheroidization.The graphite spheroi...
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JP2002097515 |
To provide a porous plug packed with a castable refractory between a gas permeable refractory and a metal case, wherein a leak from between the metal case at a tip and the castable refractory, is prevented.A castable refractory 4 is pour...
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