Method of production of aluminium iron with compact inclusions of graphite |
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IPC classes for russian patent Method of production of aluminium iron with compact inclusions of graphite (RU 2487950):
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.
Procedure for melting iron-carbon alloys in induction furnaces / 2395589
Invention refers to ferrous metallurgy, particularly to melting iron-carbon alloys in induction furnaces. The procedure consists in charging metal part of the charge, in melting and in alloying melt with silicon and carbon containing materials. Alloying is carried out with a complex mixture containing silicon and carbon at ratio CΣ: Si=(25÷90):(0.5÷65), where Si is contents of silicon in the complex mixture, and CΣ - is summary contents of carbon in the complex mixture. Also silicon is present in the composition of the mixture as silicon carbide metallurgical and/or its slimes, while carbon is present as heat treated carbon containing materials of electrode production and/or graphite.
Addition alloy for modification and alloyage of alloys / 2394929
Addition alloy contains wt %: magnesium 14-17, cerium 0.4-0.6, iron 14-16, silicon 4-7, copper - the rest.
Method of cast iron receiving with globular graphite / 2375461
Invention relates to metallurgy field and can be used for casting of products from cast iron with globular graphite. Method includes melting of intermediate product and discharge of melt into ladle. At melt temperature 1300÷1550°C it is introduced flux cored electrode, filler of which contains iron, silicon and not less than 18 wt % of magnesium, at a rate of wire feeding 0.1÷2.5 m/s and magnesium consumption 0.5÷3 kg per tone of melt. Before introduction of flux cored electrode into melt it is preliminarily introduced soda ash or mixture of soda ash and fluorspar in equal ratio in amount 1÷5 kg per tone of melt. Filler of flux cored wire can additionally contain 0.5÷10 wt % in total amount of rare-earth metals, barium, calcium, titanium, aluminium.
 Modifier with refinement effect / 2364649
Invention relates to metallurgy immediately dealing with extrafurnace refinement and modification of steel, cast iron and non-ferrous alloys. The modifier is represented by a dispersion product resulting from conversion of by-products of the ANP mineral fertiliser production, its chemical composition (wt %) being as follows: calcium carbonate - 90-94%; strontium carbonate - 2-5%; impurities represented by magnesium and barium carbonates and silica, titanium, aluminium and ferric oxides - balance.
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.
Complex modifying agent for producing cast pieces of cast iron with vermiculite or compact graphite / 2323270
Complex modifying agent contains next relation of components, mass %: magnesium, 0.5 - 10; calcium, 0.1 - 10; aluminum, 0.1 - 10; silicon, 30 - 80; total content of cerium and yttrium, 0.5 - 15; manganese, 0.1 - 15; lanthanum, 0.001 - 10; magnesia, 0.001 - 5; total content of oxides of rare earth metals, 0.001 - 10; iron, the balance.
Synthetic cast iron production method / 2324742
Invention concerns the siderurgy area and may be used when manufacturing the remelting fabricating parts that are used in the cast iron foundry production. The metal stock is loaded for melting inside an induction furnace until the melted down composition is obtained. In the furnace, upon the mirror of fusion the carbonates of the alkaline-earth metals are introduced in amounts of 10-20%, and the carboniferous material depending upon the required chemical composition of cast iron. The invention permits to intensify impregnation with carbon process, eradicates occurrence of refining foam and facilitates the sulfur removal.
 Fluxed cored wire filler for desulfurising and modification of cast iron / 2337972
Invention concerns metallurgy field and can be used in foundry. Particularly it is used for desulfurising and modification of cast iron and receiving of cast iron products with structure of globular and vermicular graphite. Filler contains, wt %: 18÷75 magnesium, part of which is introduced in metal phase; aluminium, barium, calcium, titanium, rare-earth metals at its total content 1÷10, and also iron and silicon (as the rest) - in the form of one or several materials, choose from group, including ferrosilicium, magnesium - iron - silicon alloy; mixture of metal silicon with cast iron and/or steel rattle, and/or chip, and/or powder. In filler content can also be included passivator in the form of one or several materials from group, including fired dolomite, calcium fluoride, calcium carbide, silicon carbide, soda, in amount which is a part of total content in filler of iron and silicon.
 Control mode of process for manufacturing graphite and high-duty cast iron with globular and vermicular graphite for casting receiving / 2337973
Invention concerns metallurgy field, foundry. Particularly it concerns control modes of grey and high-duty cast iron and can be used at single-piece, large-scale and mass production of cast iron castings. In method there is received basic alloy of cast iron with usage of alloying, modifying and graphitising admixtures, process qualities are controlled and corrected including operation by effect of spheroidising and vermiculising modification at the section of casting mold charging. It is implemented one-time ladleman cast iron treatment, making preliminary calculation the quantity of alloying, modifying and graphitising admixtures depending on weight of liquid metal, containing of sulphur and oxygen, basic elements and alloying inside of basic cast iron melt and time of holding modifying effect, at that control of all process parameters is outfitted by overall video surveillance system for manufacturing operations with registration and delivering of received results into computer data base and to the lighting panel. Finishing of modifying effect is alerted by acoustic alarm.
 Ligature for modification of high-strength cast irons, method of its receiving and usage / 2355803
Invention relates to metallurgy field, particularly to magnesium-bearing ligature making practice for high-strength ligatures, used for manufacturing of hard part, for instance automobile crankshaft. Ligature contains, wt %: magnesium 17-20, cerium 0.4-0.6, copper is the rest. In the method in the capacity of integumentary flux it is used powdered baric flux, which is charged on magnesium, copper is fractional introduced: at first 60-70 wt % of its total amount, and then - by 10 wt % by components melting with addition of flux for saving of melt blanket, process is implemented at the temperature 725-800°C, chosen on the basis of binary constitution diagram Mg-Cu, during 40-60 min with conclusive layer induction of refining flux of thickness 1-2 cm and introduction of cerium with solid subsurface mixing of received ligature. Then ligature is crushed for pieces 2-4 kg, after what it is introduced into the cast iron in amount 0.65-0.85 wt % of cast iron weight.
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FIELD: metallurgy. SUBSTANCE: 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. EFFECT: higher strength due to compact graphite inclusions. 1 ex
The invention relates to metallurgy, in particular to methods of producing aluminum cast iron with compact forms of graphite. Aluminum cast irons have a number of unique special features and a first resistance coupled with sufficient strength at low densities. These circumstances have predetermined the main area of application as a heat-resistant material for use in aggressive environments - part heat-treatment furnaces, sintering machines, equipment, chemical equipment, internal combustion engines, chills, etc. the Best combination of properties, allowing higher heat resistance, corrosion resistance in various corrosive environments, wear resistance, manifested in aluminum cast iron containing about 16% Al. This is because at the specified concentrations of aluminum on the surface of the casting to form a continuous solid film of Al2O3. However, such aluminum cast iron cannot claim the role of a structural material for castings due to increased hardness and fragility. This disadvantage is caused by the structure of the aluminum cast iron with Al content of 9.8-19.7 percent, unwilling to graphitization: alloyed aluminum ferrite +Fe3AlCx(γ1-phase). Known events [Konikow GA, Sukhanov A.S. Vysokokaloriynaya cast iron prom is mediate zone // Foundry. - 1999. No. 2. - P.5-6], which allows to reduce the negativity of this drawback. They are that in the ladle with molten aluminum cast iron enter the additives of copper and ferrosilicon FS. The disadvantage of this event is to achieve partial graphitization of obtaining a halfway iron with low strength. Another one from the same series event is the introduction in the bucket for compacting graphite cerium mischmetall. This allows you to increase the strength of iron and aluminum to provide a satisfactory cutability. These activities have the disadvantages of: 1) carrying out the modifying operations expenditure of expensive materials, 2) incomplete graphitization process. Closest to the claimed method of obtaining aluminum cast iron with a compact inclusions of graphite is the way to get iron with compact nodules [RF Patent №2201967]. According to this method, the molten cast iron is first subjected to quenching from the liquid state by pouring in the metal mold, located in the salt bath with a temperature of 750-850°C. is Then carried out isothermal aging for 0.5-2 hours at a temperature of 950-1100°C With subsequent cooling. Specified regulated temperature casting of cast iron in the form and its cooling allows for cast iron Fe-C-Si to obtain in the structure of the compact form of graphite inclusions without the operation of the modification. The complexity of the regulated temperature of the hot metal charging system Fe-C-Si in the form and cooling due to the need to fix after casting and crystallization of a metastable structure in which the carbon is in a bound state. Subsequent isothermal aging leads to the decay of the metastable structure with the formation of graphite compact form. In the inventive production method of aluminum cast iron with compact nodules regulated temperature casting of cast iron in the form and its cooling is simplified. This mode consists in pouring molten aluminum cast iron in metallic form located in the salt bath at a temperature of 950-1100°C, and isothermal aging zakristallizuetsya casting at the same temperature for 0.5-2 hours. This simplified regulated temperature casting of cast iron in the form and cooling due to the fact that, due to the lack of inclination aluminum cast iron containing Al of 9.8-19.7 percent, to graphitization, it is not necessary to take measures for organization of metastable crystallization. A sufficient condition for a compact graphitization is isothermal aging zakristallizuetsya casting at a temperature of 950-1100°C for 0.5-2 hours. This high speed process due to hardened the output state of the iron, obtained by filling in the form under conditions of high thermal activity. The upper limit temperature (1100°C) isothermal aging zakristallizuetsya casting due to the undesirability of course of phase transformations. The lower limit (950°C) is limited to a significant delay of the graphitization process. The time interval (0.5 to 2 hours) isothermal aging zakristallizuetsya casting due to the following circumstances. When increasing the exposure time of more than 2 h speed graphitization is reduced to such limits, upon which the resulting technological-economic effect is not significant. If the shutter speed is less than 0.5 h in the structure of cast iron there is a large number of Fe3AlCx(γ1-phase), the presence of which leads to an increase in the hardness and brittleness of the casting. A specific example of the inventive method of producing aluminum cast iron with compact nodules. Melt aluminum cast iron received in an induction furnace with a basic lining using top slag composed of CaF2, Na3AlP6Caso3, charcoal. Aluminum was introduced under the mirror melt. Superheated up to 1530°C cast iron is poured into the form, placed in the salt bath composed of molten salts NaCl and BaCl in equal molar ratio. Salt VA is on had a temperature of 1080°C. The composition of iron, certain spectral method is characterized by the following data on the concentration of impurities, % (mass.): Al - 15,8; Si Is 0.33, With A 2.2. The time of isothermal holding the casting at a specified temperature for 1 hour 30 minutes The study of the structure of iron was observed the following. Metal matrix represented by ferrite and has a hardness of 370 HV. Graphite inclusions are distributed evenly, have a compact shape, a size of 15-20 microns. The method of obtaining aluminum cast iron with compact nodules, comprising preparing a melt of cast iron, pouring the melt into the metal mold, and cooling the melt, characterized in that the prepared molten pig iron containing by 9.8-19.7% of Al, the pouring of the melt is carried out in a metal mold, placed in a salt melt with a temperature of 950-1100°C, zakristallizuetsya casting isothermal maintained at a temperature of 950-1100°C for 0.5-2 hours
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