Method for ladle modification of molten cast iron with light-weight magnesium-containing alloy combinations |
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IPC classes for russian patent Method for ladle modification of molten cast iron with light-weight magnesium-containing alloy combinations (RU 2500819):
 Brittoniana mixture for the inoculation of grey cast iron / 2124566
The invention relates to metallurgy, foundry, to the modification of gray cast iron, namely the structures of complex modifiers used in the manufacture of castings from grey cast iron, having a complex configuration and a wide range of mass and wall thickness of castings
 Method for the production of high-strength cast iron / 2121511
The invention relates to metallurgy and allows you to reduce the expense of modifying substances without the risk of producing castings in which graphite is not completely fell in grain
 Exothermic mixture for alloying of iron-carbon alloys with chromium in the bucket / 2098492
The invention relates to a technology for alloyed with chromium iron alloy in the ladle, in particular to exothermic mixtures
 Exothermic mixture for alloying of iron-carbon alloys with molybdenum / 2098489
The invention relates to ferrous metallurgy, in particular to the production of exothermic mixtures for alloying of cast iron in the ladle
 The method of making castings of high-chromium cast iron / 2017578
The invention relates to metallurgy and, in particular, can be used in the manufacture of castings of high-chromium cast iron
 Method for obtaining high-strength cast-iron with vermicular graphite by intra-mould modification using alloy combinations of fe-si-rem system / 2497954
Method involves loading to a reaction chamber of a pouring gate system of modifying agent charge in the form of Fe-Si-REM alloy combination providing initial concentration of rare-earth metals in molten cast-iron of 0.075%; then, after the casting mould is assembled, a lump of FS75 with the weight of 0.24-0.46% of metal consumption of the mould is laid in its pouring basin for graphitising pre-modification, and it is filled with molten cast-iron from the furnace.
 Method for obtaining nanostructured recarburising agent for out-of-furnace treatment of high-strength cast-iron with ball-shaped and compacted graphite / 2495134
Method involves preparation of carbon-containing composition containing the following components, wt %: anthracite 50-85, graphite scrap 5-25, broken electrodes 5-25, graphite structure 5-15 that is crushed to the fraction of 0.1-3.2 mm, burnt at the temperature of 500-1500°C, graphite spheroids are formed in the material structure at high specific pressure of up to 20 GPa and subject to high-temperature exposure at 1800-2500°C in a reducing medium so that graphite nanostructures with the size of up to 100 nm are formed, which represent graphite nanoclusters with a hexagonal pattern.
Production method of high-strength cast-irons with ball-shaped or compacted graphite based on nanostructured recarburising agent / 2495133
Proposed method involves melting of a charge in a melting unit, heat treatment of the melt at 1300…1650°C; at that, when obtaining cast-iron with ball-shaped graphite, primary modification is performed with nanostructured recarburising agent in the quantity of 0.10…0.25% of the melt weight, and secondary spheroidising modification is performed by means of a modifying agent containing 5…7% of magnesium, in the quantity of 1.2…2.0% of the melt weight, and when obtaining cast-iron with compacted graphite, primary modification is performed with nanostructured recarburising agent in the quantity of 0.10…0.25% of the melt weight, and secondary compacting modification is performed with a modifying agent containing 3…5% of magnesium and 3…6% of rare-earth elements in the quantity of 0.3…0.8% of the melt weight.
Method of production of aluminium iron with compact inclusions of graphite / 2487950
Proposed method comprises making iron melt with aluminium content of 9.8-19.7%, pouring said melt in metal mould placed in salt melt at 950-1100°C, cooling said melt and isothermal curing of crystallised casting at 950-1100°C for 0.5-2 hours.
Alloy combination for production of castings from high-strength cast-iron (versions) / 2480530
As per Version 1, alloy combination contains the following, wt %: silicon 22.0-30.0, magnesium 9.0-12.0, cerium 0.4-0.6, copper is the rest; as per Version 2, alloy combination contains the following, wt %: silicon 22.0-30.0; magnesium 9.0-12.0, misch metal 0.8-1.2, and copper is the rest.
Modifying agent for obtaining cast iron with spherical graphite / 2445387
Modifying agent contains the following, wt %: magnesium 7.0-9.0; cerium 8.0-10.0; iron ≤ 1.5; nickel is the rest.
 Cast iron properties influence method / 2444729
In cast iron properties influence method there measured by addition of magnesium to cast iron melt is content of oxygen in cast iron melt; at that, to cast iron melt there added is magnesium till oxygen content in cast iron melt at temperature of about 1420°C is about 0.005-0.2 ppm. At that, magnesium is added till oxygen content is less than 0.1 ppm, preferably between 0.08 and 0.1 ppm.
 Procedure for production of iron with vermiculite graphite / 2427660
Procedure consists in melting charge in electric furnace, in heating iron melt in it to temperature 1490-1510°C and in modification of produced melt in ladle with mixture containing complex addition alloy FSMg7 containing REM (rare earth metals) 0.3-1.0 %, magnesium 6.5-8.5 %, at amount of 0.2-0.5 % and 22 % silicobarium SIBAR22 at amount 1.5-2.0 % of weight of treated iron melt.
Procedure for production of cast iron with spherical graphite and austenite-ferrite metal matrix / 2415949
Cast iron is melt in electric furnace. At tapping into a ladle melt is modified at temperature 1370-1400°C with complex alloy consisting of silicon-barium at amount 70-80 % of alloy weight. Preliminary there are produced casts out of mottled iron with austenite-martensite matrix by casting into a raw sand-clay mould. To obtain austenite-ferrite structure in iron casts they are subjected to graphitising annealing at temperature 980-1100°C, to conditioning during 3-5 hours and to successive cooling with a furnace to room temperature.
Powder wire for out-of-furnace treatment of melts on iron base (versions) / 2396359
Invention refers to metallurgy and is designed for desulphurisation and modifying iron-carbon melt for production of items out of grey cast iron and also for iron with graphite of ball and vermicular shapes. According to the first version of the invention powder wire consists of a metal shell and filler in form of powders mixture of metallic magnesium and additive, corresponding to ferro-silicate-calcium, at the following ratio of elements in the filler, wt %: magnesium 20-55, calcium 12-25, silicon 28-50, iron - the rest. According to the second version mixture of ferro-silicate-calcium with ferro-silicate-magnesium and/or magnesium silicide is used as an additive at the following ratio of elements in the filler, wt %: magnesium 15-40, calcium 8-17, silicon 42-64, iron - the rest.
Briquette used in manufacture of cast iron / 2247155
Briquette includes silicon-containing material, carbon-containing material, and cement as binder. Silicon-containing material includes metallurgical silicon carbide and carbon-containing material includes carbon-siliceous mixture.
 Modifying agent / 2247170
Claimed modifying agent contains (mass %) ferrosilicon barium 0.5-5.0 and gypsum 25-5 %.
Method of production of ingots made out of mottled cast iron with austenitic-bainite structure / 2250268
The invention is dealt with metallurgy, in particular, with development of a method of production of mottled cast irons with globular graphite, which may be used for manufacture of components being worn under action of increased loadings. The method provides, that the mottled cast iron is melted down in the induction furnace, the liquid melt at pouring into a ladle is modified with magnesium-bearing addition alloys for formation of the ball-shaped graphite impurities in the ingots and during casting into a sandy-argillaceous mold expos it to inoculating modification. The ingots after crystallization are pulled out from the molds at the temperature of 900-1000°C, transposed to a furnace with temperature of 950-1000°C and keep there during 10-30 mines. After the aging the ingot is exposed to quenching in an isothermal bath at the temperature of 300-320°C within 1-1.5 hour. At that they use the cast iron of following chemical composition, (in mass %): carbon - 3.2-3.4, silicon - 3.0-3.3, manganese - 0.3-0.4, magnesium - 0.04-0.07, molybdenum - 1.5-1.7, nickel - 2.2-2.6, sulfur - 0.01-0.012, phosphorus - 0.06-0.08, iron - the rest. The invention allows to obtain a mottled cast iron with globular graphite and austenitic-bainite structure, high impact resistance, strength, hardness, wear resistance and quasi-isotropy.
Modifying master alloy for cast iron producing method / 2277589
Method comprises steps of preparing, heating, pouring and crystallizing melt under protective flux. Melt is heated till temperature higher than liquidus temperature t1 by 10 - 99°C; pressure value is in range 10-3 - 0.9 x 10-1 MPa. Invention allows prepare modifying master alloy with easy-to-melt magnesium-containing component, with high density and uniform distribution of properties in the whole volume.
 Semifinished product of foundry cast iron and method of its production / 2312161
Proposed semifinished product is made from composition system of white cast iron. Structure contains, independently or in complex, spheroidal or flattened particles of graphite whose outer surface is partially or fully coated with ferrite. Particles are dispersed at density of 50 particles/mm2 or more. Cast iron is produced by casting the melt of white cast iron constituents containing the spheroidizing agent. After casting, rolling and heat treatment are performed for obtaining spheroidal particles of graphite or heating and hot rolling are performed for obtaining flattened particles of graphite.
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FIELD: metallurgy. SUBSTANCE: in rear part of a ladle bottom, opposite its nose part, there located by means of an inclined chute depending on weight of treated cast iron is one or more molten welded tightly closed containers from steel sheets with thickness of 1.5…2.0 mm, with tightly packed spheroidising modifying agent in the form of magnesium-containing alloy combination and bulk volume of up to 10 kg; after that, the ladle is intensely filled with molten cast iron for the period of not more than 40 seconds with direction of a jet to a free part of the ladle bottom. EFFECT: invention allows improving microstructure and mechanical properties of cast iron in castings and providing high labour capacity owing to reducing labour intensity. 2 tbl, 1 dwg
The invention relates to metallurgy, in particular to a method for producing high-strength nodular and compacted graphite scoop modification of light magnesium-containing ligatures. It is widely known that to obtain high-strength cast iron with nodular and compacted graphite iron light alloys (specific gravity less than the specific gravity of the molten cast iron) used such methods of the bucket spheroidizing modification as "sandwich-process", "bucket with lid and other (Knustad, O. Problems in the production of ductile cast iron. A review of existing methods of obtaining HF and used modifiers [Text] / O. Knustad // Caster Russia. - 2011. No. 4. - P.19-26; Konikow, GA Basics of casting production [Text] / Gasonics. - St. Petersburg: St. Petersburg state Polytechnical University, 2002. - 204 S.; Alexandrov, N.N. High quality cast iron for castings [Text] / N.n.alexandrov. - M: mechanical engineering, 1982. - 222 S.; RF patent №2074894). The existing methods of the bucket spheroidizing modification require the use of special technological schemes for placement of a modifier, such as the reaction pocket for modifier on the bottom of the ladle, and/or additional equipment for filling the ladle with the molten iron from the furnace, such as cap-reservoir with an opening for the accumulation of molten pig iron from the furnace and dosed it in the feed bucket, forklift for removing and fitting the lid on the bucket. The disadvantages of the known methods of the bucket spheroidizing inoculation of cast iron are: increased complexity, the need for additional equipment and machinery, reducing productivity. The present invention is to reduce the complexity, the rejection of the use of additional equipment, increasing productivity. The technical result in the implementation of the invention is to provide a simplified compared to the "sandwich" process method of the bucket inoculation of ductile iron without the use of additional equipment and machinery and to consistently obtain the required quality of iron castings. The problem is solved in that a method of the bucket spheroidizing inoculation (figure 1), whereby the rear part of the bottom bucket (front tip) using an inclined chute have one or more depending on the weight of the treated molten iron welded containers from sheet steel with a thickness of 1.5 to 2.0 mm, a bulk volume of up to 10 kg with densely Packed spheroidizing inoculant ("light" ligature type MgFeSi alloy) and sealed, after which the bucket intensivosa no more than 40 is filled with molten cast iron jet direction in the free (Noskova) part of the bottom of the bucket. The condition of the rapid filling of the ladle with the molten cast iron is due to the fact that "consumable" container made of sheet steel with a thickness of 1.5 to 2.0 mm, melted fairly quickly, and the reaction rate of the molten cast iron with modifier high. However, the most active phase of the reaction melt cast iron modifier with this method of inoculation occurs less intensively than the "sandwich"process, not accompanied by a strong boiling and bubbling, which is confirmed by a visual assessment of the process. Otherwise, a method of the bucket modification of melt cast iron light magnesium-containing ligatures can be named as "the sandwich process with a consumable reactionary pocket". Research conducted on the sources of patent and scientific and technical information, showed that the proposed method for high strength cast iron with nodular and vermicular graphite scoop modification of light alloys is unknown and is not obvious from the investigated prior art, i.e. meets the criteria of "novelty" and "inventive step". The inventive method modification can be used in conditions of iron production and meets the criterion of "industrial applicability". The results of the analysis of the composition, structure, and SV is ist castings parts from high-strength cast iron grades VC (2101-2402018 "the gear case rear axle and 2101-3103015 "Hub of front wheel") and Gh56-40-05 (2108-2303018 "Box differential") (table 1, 2), obtained by container modification modifier Fsmg showed their full compliance with the technical requirements for the material castings.
The way the bucket modification of melt cast iron light magnesium-containing ligatures, characterized in that the rear part of the bottom of the bucket, front toe, with the help of inclined chutes feature depending on the weight of machined cast iron one or more fusible welded, hermetically sealed containers from sheet steel with a thickness of 1.5 to 2.0 mm, densely Packed spheroidizing inoculant in the form of magniysoderzhaschee ligatures and bulk up to 10 kg, after which the bucket intensively for no more than 40 filled with molten cast iron jet direction in the free part of the bottom of the bucket.
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