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JP7139877B2 |
To more surely suppress occurrence of nitrogen absorption reaction in ladle refining accompanied by electric heating.A ladle refining method of a molten steel includes forming a slag layer on a molten steel surface in a ladle and immersi...
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JP7139879B2 |
To more surely suppress occurrence of a nitrogen absorption reaction in ladle refining accompanied by electric heating.There is provided a ladle refining method of a molten steel in which two or three electrodes are immersed in a slag la...
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JP7139876B2 |
To suppress a temperature drop and solidification of a slag in ladle refining accompanied by electric heating, and more surely improve various refining reaction speeds.A ladle refining method of a molten steel includes forming a slag lay...
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JP7139878B2 |
To more surely suppress occurrence of a nitrogen absorption reaction in ladle refining accompanied by electric heating.There is provided a ladle refining method of a molten steel in which two or three electrodes are immersed in a slag la...
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JP7135525B2 |
To provide a device and a method for producing a metal lump in which fine oxide based inclusions are largely dispersed so as to obtain sufficient HAZ toughness even upon high heat input welding.A device for producing a fine oxide-dispers...
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JP7119642B2 |
To provide a manufacturing method of steel capable of reducing generation of inclusion defect due to alumina cluster.There is provided a manufacturing method of a steel for manufacturing a killed steel by deoxidizing a tapped molten stee...
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JP7119641B2 |
To provide a manufacturing method of steel capable of reducing generation of inclusion defect due to alumina cluster.There is provided a manufacturing method of a steel for manufacturing a killed steel by deoxidizing a tapped molten stee...
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JP7118599B2 |
To provide a ladle refining method of a molten steel capable of realizing a targetted very low sulfur molten steel in a short time, when a molten steel in a ladle is desulfurized by ladle refining of the molten steel accompanying electri...
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JP7095470B2 |
To manufacture a titanium ingot or titanium alloy ingot having a LDI reduced up to a level required for, for example, an airplane material.Molten metal 51 including the melt of a titanium containing raw material 50 is refined using a hea...
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JP7094238B2 |
To provide a porous plug capable of improving air permeability and reducing infiltration of molten steel.A porous plug is composed of 40-90 mass% of medium particles consisting of irregularly-shaped alumina having a particle diameter of ...
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JP2022095853A |
To provide a pressure addition device capable of contributing to reduction of ingot man-hours of a ductile cast iron; and to provide a ladle used for the pressure addition device, and a pressure addition method.A pressure addition device...
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JP7087725B2 |
To provide a manufacturing method of steel good in yield of REM and capable of reducing generation of inclusion defect due to alumina cluster.There is provided a manufacturing method of a steel for manufacturing a killed steel by deoxidi...
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JP7087728B2 |
To provide a manufacturing method of steel reducing thickness of an inclusion adhered to an inner surface of an immersion nozzle and reducing inclusion defect due to alumina cluster.There is provided a manufacturing method of a killed st...
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JP7087726B2 |
To provide a manufacturing method of steel good in yield of REM and capable of reducing generation of inclusion defect due to alumina cluster.There is provided a manufacturing method of a steel for manufacturing a killed steel by deoxidi...
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JP7087723B2 |
To provide a manufacturing method of a steel capable of reducing generation of inclusion defect due to alumina cluster.There is provided a manufacturing method of a steel for manufacturing a killed steel by deoxidizing a tapped molten st...
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JP7087724B2 |
To provide a manufacturing method of steel capable of reducing generation of inclusion defect due to alumina cluster.There is provided a manufacturing method of a steel for manufacturing a killed steel by deoxidizing a tapped molten stee...
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JP7087727B2 |
To provide a manufacturing method of steel reducing generation of inclusion defect due to alumina cluster, and manufacturing a steel while suppressing nozzle jamming during continuous casting without using a large amount f slag modifier....
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JP7078923B2 |
To solve the problems that the ascent and descent operation of heavy articles in a rotation drive unit is caused every time, the operation is troublesome, a rotation shaft made of carbon is weak against shock and easily broken, the whole...
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JP7060113B2 |
Ca (calcium) is added to molten steel contained in a ladle at a high addition yield by improving the composition of a Ca-containing alloy added to the molten steel.A method for adding Ca to molten steel according to the present invention...
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JP7058713B1 |
To provide a pressure adding device contributing to reduction of man-hours for melting ductile cast iron, a ladle used in the pressure adding device, and a pressure adding method. In the pressure adding device (1) according to one embodi...
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JP7047647B2 |
To provide a thin slab continuous casting method, in a thin slab continuous process, capable of individually creating small lot materials at high efficiency and a high-low yield while continuing continuous casting.A tundish weir 5 having...
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JP7045459B2 |
Provided are a high-strength steel material for a polar region environment having excellent anti-fracture characteristics at low temperatures and a method for manufacturing the same. A high-strength steel material having excellent anti-f...
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JP2022045031A |
To provide a device and method for stably removing one or both of bubbles and inclusions from conductive fluid to which an electromagnetic brake is applied.A device 30 for removing one or both of bubbles P'' and inclusions T from conduct...
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JP7035870B2 |
To provide a method for smelting steel into highly cleaned steel capable of smelting steel into highly cleaned steel by reducing alumina inclusion when compared to prior art and casting the same.When a vacuum degassing treatment is condu...
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JP7035871B2 |
To provide a method of smelling steel into high cleaned steel capable of producing high cleaned steel by smelling, in which deoxidized products is removed to be reduced rather than prior art.When a vacuum degassing treatment is conducted...
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JP7035885B2 |
To provide a titanium ingot or a titanium alloy ingot of excellent quality with less LDI (Low Density Inclusion).A manufacturing method of a titanium alloy ingot 52 includes: a raw material supply process of supplying a raw material 50; ...
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JP7035872B2 |
To provide a method of smelling steel into high cleaned steel capable of providing cast high cleaned steel by smelling in which alumina inclusions is reduced rather than prior art.When a vacuum degassing treatment is conducted by immersi...
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JP7035873B2 |
To provide a method of smelling steel into high cleaned steel capable of producing cast high cleaned steel by smelling in which deoxidation product is removed to be reduced rather than prior art.When a vacuum degassing treatment is condu...
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JP7031634B2 |
To provide a production method of a sour resistant steel in which formation of MnS is suppressed and the HIC resistance is improved without increasing an amount of Ca added in a sour steel containing Mg and Ca as components.A method for ...
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JP7027858B2 |
To provide a carbon steel slab containing REM to improve the toughness of a welding heat affected zone by utilizing the inclusions as pinning particles.The carbon steel slab contains C, Si, Mn, P, Al, t.S, t.Ti, t.O, t.N and contains t.C...
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JP7023491B2 |
To provide a method in which a metal wire obtained by coating a magnesium-containing composite or a magnesium simple substance with a coating material made of iron or steel is fed to molten metal and the yield in the molten metal of the ...
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JP6993646B2 |
To provide an inoculant that increases the number of graphite grains at least up to the same level in the conventional inoculant.The inoculant has an Fe-Si alloy blended with at least one element of Ti, V, and Nb, preferably with Si of 7...
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JP2021188063A |
To provide a steel material that has a good HAZ toughness even after welding.A steel material that has a steel composition containing C, Si, Mn, P, S, Al, N, O, Ti, B, Mg, Ca, REM, and the balance consisting of Fe and impurity elements, ...
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JP6968369B2 |
To provide an inoculant that increases the number of graphite grains at least up to the same level in the conventional inoculant.The inoculant has Fe-Si alloy powder blended with bismuth oxide powder, lanthanum oxide powder, cerium oxide...
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JP6956395B2 |
To provide a method and an apparatus for producing a slurry that can produce a slurry having a uniform shape and a uniform texture, and a method for molding using a semi-solidified slurry that can make a molding product having a uniform ...
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JP6955254B2 |
To provide a crystal grain refining agent for casting capable of obtaining a similar effect by addition in an amount smaller than that in the conventional one to the molten metal of an aluminum casting material and an aluminum alloy cast...
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JP6945055B2 |
Disclosed is a slag discharging method in a process of producing ultra-low phosphorus steel, which relates to the technical field of iron and steel smelting, and in which molten steel is mixed with lime first to produce basic slag; then ...
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JP2021137875A |
To provide a removal device stably removing one or both of bubbles and inclusions from a conductive fluid acted with an electromagnetic brake.A removal device 30 removes one or both of bubbles P'' and inclusions T from a conductive fluid...
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JP2021134379A |
To provide a dephosphorization method in which P amount in aluminum alloy is reduced to 2 ppm or less.The problem is solved by increasing the amount of silicon (Si) in the molten aluminum alloy to 13 to 20%, followed by solidification to...
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JP6892063B2 |
To provide a gas blowing plug in which occurrence of gas leakage is suppressed even when a furnace in which the plug is assembled is inclined.A gas blowing plug 1 of the present invention includes a plug body 2 made of refractory, a base...
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JP6888275B2 |
To stabilize the yields of sulfur in molten steel when sulfur material is added to molten steel, and prevent nozzle clogging caused by impurities during continuous casting.A method for producing sulfur-added steel is characterized by usi...
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JP6869261B2 |
A ferrosilicon inoculant for gray cast iron containing between 0.1 to 10% by weight strontium, less than 0.35% by weight calcium, 1.5 to 10% by weight aluminum and 0.1 to 15% zirconium, The inoculant, method for producing the inoculant, ...
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JP6862578B2 |
A bearing steel for use in automobile wheels and a manufacturing process therefor. The bearing steel has the following chemical composition by weight percent: carbon: 0.58-0.61%; silicon ≤ 0.15%; manganese: 0.87-0.95%; copper: 0.10-0.2...
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JP2021050368A |
To provide a method for removing an AlP cluster formed when a molten metal of an aluminum alloy solidifies.The problem is solved by adding strontium (Sr) to a molten metal in a ladle, adding a fluoride, and agitating with an impeller.SEL...
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JP2021049564A |
To provide a tundish upper nozzle structure that allows inclusions to float up within a tundish, and a method of continuous casting.A tundish upper nozzle structure includes a flange-like part 12 that is provided greater than the outer s...
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JP2021505397A |
To provide a melt processing apparatus capable of ensuring a sufficient and appropriate residence time of a melt contained in a container. In a melt processing apparatus according to the present invention, a melt accommodating space is f...
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JP6825191B2 |
The present disclosure relates to a method of controlling an electromagnetic stirrer arranged around a submerged entry nozzle, SEN, of a tundish provided with a stopper rod to control throughput of the tundish, the SEN being configured t...
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JP6823311B2 |
The present invention provides a casting method and cast product of spherical graphite cast iron, in which, even with a small modulus, there is no chill, the spherical graphite in the tissue is further made ultrafine, the dispersion of t...
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JP6819616B2 |
Provided is a method for introducing an add-in material to a container containing molten metal, the method including a nozzle disposition step for disposing nozzles above the molten metal contained in the container, and an add-in materia...
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JP6817463B2 |
A quantity of continuously cast Mg brass is made by the step of melting a charge of Mg brass and then continuously casting a rod of the Mg brass through a casting die. The casting die has been previously treated by continuously casting a...
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