Production method of high-strength cast-irons with ball-shaped or compacted graphite based on nanostructured recarburising agent |
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IPC classes for russian patent Production method of high-strength cast-irons with ball-shaped or compacted graphite based on nanostructured recarburising agent (RU 2495133):
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.
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.
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 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. EFFECT: invention allows obtaining high-strength cast-iron for mass casting of items with increased physic and mechanical properties. 4 cl, 1 tbl
The invention relates to metallurgy, foundry, to methods of manufacturing high-strength cast iron with nodular and compacted graphite based primary processing of nanostructured melt nagarajaram. There is a method of refining and modification of iron-carbon melt (patent RU №2192479), including the introduction of refining and modifying mixture consisting of materials containing oxides of barium, calcium, magnesium, rare earth metals, silicon, and bortovoy ore and aluminum. The mixture is injected at a melt temperature not less than 1300°C in 0,5...5 kg/t content, wt.%: the oxides of barium, calcium, magnesium - 50...70; oxides of rare earth metals - 1...10; Baratova ore - 2...5; aluminum - 5...20; silicon - 20...35. The disadvantages of this method are rich slag formation during melt processing and increased contamination of the melt of non-metallic inclusions of oxides of origin, and it reduces the stability and sustainability of the process of obtaining high physical-mechanical properties of the alloy. Closest to the claimed technical solution is the method of grinding graphite inclusions in high-strength cast iron (patent RU №2402617), including the melting of the charge in the melting unit, the finishing temperature of the melt to 1440...1450°C, ervine modification of fine si FS in the amount of 0.15...0.20 per cent by weight of the melt and inoculation complex ligature of 70% MgFeSi alloy-7 and 30% SIBAR22 fraction 4...8 mm Shutter speed between primary and secondary modification does not exceed 3 minutes, and the shutter speed and the modification of the melt is carried out until reaching the iron eutectic composition, wt.%: carbon 3,10...3,25; silicon 3,7...4,00; manganese...0,25 0,20; copper 1,00 1,50...; phosphorus 0,02 0,03...; sulfur 0,012 0,01...; magnesium 0,07 0,04...; iron - rest.. However, this method has several disadvantages: - instability and the first processing stage melt fine FS, because processing in the gutter at the junction of the metal does not provide the uniformity of absorption by volume of the melt, and the introduction of FS in the bucket followed by sublimation of the fine fraction of heat fluxes, which also reduces the effectiveness of treatment; - the integrated ligature (70% MgFeSi alloy-7 and 30% SIBAR22) does not provide the frequency of modification in the mass production of castings, as present natural vibration in the foundry leads to a natural separation of complex ligatures on densities and difficult physical observance of the ratio of masses between MgFeSi alloy-7 and SIBAR22 that leads to the effects nemodernizirovana iron and, therefore, instability of the process; narrow the time interval between the primary and secondary modification is not possible to ensure stable production of castings required. The invention is directed is to obtain a method of stable production of high-strength cast iron with nodular and compacted graphite iron for the mass production of castings with improved physical and mechanical properties. To achieve the goals of the production of high-strength cast iron with spherical graphite in the method of production of high strength cast iron with spherical graphite-based nanostructured nauglerozhivatelya, including the melting of the charge in the melting unit, the temperature of the melt processing, primary and secondary modification aged between them, the temperature melt processing is 1300...1650°C in the primary modification carried out carburizing nanostructured nagarajaram in the amount of 0.10...of 0.25% by weight of the melt by the method of injection under the mirror melt, and inoculation is spheroidizing treatment with consumption characteristics modifier containing 5...7% magnesium in the amount of 1,2...2,0% by weight of the melt, and the time between the carburizing and spheroidizing the modification does not exceed 24 hours, and the shutter speed and the modification is carried out until reaching the nodular cast iron next eutectic composition, wt.%: carbon 2,80...4,30; silicon 1,60...4,20; manganese 0,01...1,20; copper 0,001...10,0; phosphorus 0,005...to 0.80; sulfur 0,001...to 0.80; magnesium 0,025...0,09; iron - rest. The inventive method includes the following operations. The melting of the charge in the melting unit, temperature melt processing, primary and secondary modificy the Finance aged between them. While in the primary modification carried out carburizing nanostructured nagarajaram method of injection under the mirror melt, and inoculation is spheroidizing treatment with consumption characteristics modifier containing 5...7% magnesium in the amount of 1.2 to 2.0% by weight of the melt. The time between the carburizing and spheroidizing the modification does not exceed 24 hours. The shutter speed and the modification is carried out until reaching the nodular cast iron next eutectic composition, wt.%: carbon 2,80...4,30; silicon 1,60...4,20; manganese 0,01...1,20; copper 0,001...10,0; phosphorus 0,005...to 0.80; sulfur 0,001...to 0.80; magnesium 0,025...0,09; iron - rest. The melting of the charge is carried out in a melting unit, which can be used in the cupola, induction or electric arc furnace. Then hold the temperature of the melt processing at 1300...1650°C and carburizing nanostructured nagarajaram method of injection under the mirror melt. At temperatures below 1300°C due to the high viscosity of the liquid metal is not effective injection of nauglerozhivatelya in the melt, and temperatures over 1650°C leads to the formation of cracks in the refractory tube through which produce blowing nauglerozhivatelya. The number of nauglerozhivatelya is 0.10...0,5% by weight of the melt. Nanostructures graphite, available in nowheresville fall into the melt of cast iron and are evenly distributed in the liquid metal in the form of nanoclusters fullerene structure size up to 100 Nm, which ensures their stability and inertness to gases, non-metallic compounds present in the melt. The graphite nanostructures are ideal centers of crystallization of graphite inclusions in subsequent spheroidizing treatment. In this state, the graphite Nanostructures can melt iron within 24 hours, ensuring the stability and sustainability of the modification. The uniform distribution of centers of crystallization of graphite inclusions provides a high physico-mechanical properties of the cast iron during solidification and high technological characteristics in the liquid state: the fluidity and formusername. With the introduction of nauglerozhivatelya in amounts less than 0.10% of the weight of the melt is insufficient education centers of crystallization of graphite, resulting in the formation of the structure of cast iron in the subsequent spheroidizing treatment of cementite inclusions. With the introduction of nauglerozhivatelya 0.25% no further improvement of physico-mechanical properties and technological characteristics, but in the structure of cast iron in the subsequent modified the Institute appear include graphite dendritic distribution, that confirms the glut of centers of crystallization of graphite. Subsequent spheroidizing modification within 24 hours provides a stable and steady formation of nodular graphite in cast iron with compacted graphite iron. Temporal break of more than 24 hours between carburizing and modifying the melt processing is undesirable because it leads to burnout members of the cast iron main elements silicon and carbon, which is unacceptable in the production of ductile cast iron. Discharge characteristics of spheroidizing inoculant containing 5...7% magnesium, in quantities less than 1.2% of causes in the structure of inclusions compacted graphite castings from nodular cast iron, which is very undesirable; more than 2,0% leads to the formation is broken, there is a "degenerate" graphite, which reduces the physico-mechanical properties. The content of chemical elements in high-strength cast iron with spherical graphite is presented in the following eutectic composition, wt.%: carbon 2,80...4,30; silicon 1,60...4,20; manganese 0,01...1,20; copper 0,001...10,0; phosphorus 0,005...to 0.80; sulfur 0,001...to 0.80; magnesium 0,025...0,09; iron - rest; following reason. The carbon content is below 2,80% leads to a low fluidity of cast iron and insufficient quantity necessary for the formation of graphite phase; above 4,30% carbon is riodic education samachisa cast iron with reduced technological characteristics and low elongation. The silicon content below 1,60% leads to the formation of chemical compounds of the type Fe3C (cementite); over 4,20% silicon contributes to increased brittleness of cast iron and reduces technological properties. The presence of manganese less than 0.01% contributes to the formation of ferritic metal matrix cast iron, which is acceptable in limited options for production of castings, but at fusion requires the use of ultrahigh-purity charge materials, reducing the profitability of production of iron castings; more than 1,20% manganese promotes the formation of complex carbides and, consequently, impairs subsequent machining of castings, which is undesirable for the production of engineering castings. The presence of copper less than 0.001% requires the use of clean charge materials that is inappropriate; more than 10.0% of the copper does not increase the strength properties of cast iron. The phosphorus content below 0.005%, it is difficult to provide technically, due to the appreciation of blended materials; more than 0,80% phosphorus leads to the formation was eutectic, which leads to increased brittleness and hardness. The sulfur content of 0.01% requires spending modifiers, there is no influence on physical-mechanical and technological properties of cast iron; more than 0,80% sulfur prevents the formation of spherical graphite, which is unacceptable in PR is the production of high-strength cast iron. The presence of magnesium less than 0.025% does not provide the required form of graphite in cast iron; more than 0.90% magnesium leads to the effect of "premodification and degeneration of the required form of graphite. To achieve the goals of the production of high-strength cast iron with compacted graphite in the method of production of high strength cast iron with compacted graphite on the basis of nanostructured nauglerozhivatelya, including the melting of the charge in the melting unit, the temperature of the melt processing, primary and secondary inoculation, temperature melt processing is 1300...1650°C in the primary modification carried out carburizing nanostructured nagarajaram method of injection under the mirror melt, and inoculation is vermicularis inoculation with consumption characteristics modifier containing 3...5% magnesium and 3...6% rare earth elements in an amount of 0.3 to 0.8% by weight of the melt to obtain of compacted graphite iron next eutectic composition, wt.%: carbon 2,80...4,50; silicon 1,60...4,50; manganese 1,50 0,01...; copper 0,001...10,0; phosphorus 0,001...to 0.80; sulfur 0,001 1,00...; magnesium 0,01 0,06...; iron - rest. The method is as follows. The melting of the charge in the melting unit, temperature melt processing, primary and secondary is modificirovanie aged between them. While in the primary modification carried out carburizing nanostructured nagarajaram method of injection under the mirror melt, and inoculation is vermicularis inoculation with consumption characteristics modifier containing 3...5% magnesium and 3...6% rare earth elements in an amount of 0.3 to 0.8% by weight of the melt, and the time between the carburizing and vermiculation the modification does not exceed 24 hours, and the shutter speed and the modification carried out to achieve a compacted graphite iron next eutectic composition, wt.%: carbon 2,80...4,50; silicon 1,60...4,50; manganese 1,50 0,01...; copper 0,001...10,0; phosphorus 0,001...to 0.80; sulfur 0,001 1,00...; magnesium 0,01 0,06...; iron - rest. The melting of the charge is carried out in a melting unit, which can be used in the cupola, induction or electric arc furnace. Then hold the temperature of the melt processing at 1300...1650°C and carburizing nanostructured nagarajaram method of injection under the mirror melt. At temperatures below 1300°C due to the high viscosity of the liquid metal is not effective injection of nauglerozhivatelya in the melt, and temperatures over 1650°C leads to the formation of cracks in the refractory tube through which produce blowing nauglerozhivatelya The number of nauglerozhivatelya is 0.10...of 0.25% by weight of the melt. Nanostructures graphite, available in nowheresville fall into the melt of cast iron and are evenly distributed in the liquid metal in the form of nanoclusters fullerene structure size up to 100 Nm, which ensures their stability and inertness to gases, non-metallic compounds present in the melt. The graphite nanostructures are ideal centers of crystallization of graphite inclusions in subsequent vermicularis modification. In this state, the graphite Nanostructures can melt iron within 24 hours, ensuring the stability and sustainability of the modification. The uniform distribution of centers of crystallization of graphite inclusions provides a high physico-mechanical properties of the cast iron during solidification and high technological characteristics in the liquid state: the fluidity and formusername. With the introduction of nauglerozhivatelya in amounts less than 0.10% of the weight of the melt is insufficient education centers of crystallization of graphite, resulting in the formation of the structure of cast iron in the subsequent vermicularis modification of inclusions of cementite. With the introduction of nauglerozhivatelya 0.25% no further improvement of physico-mechanical properties and technology and the environmental characteristics, but in the structure of cast iron with subsequent modification appear include graphite dendritic distribution, which confirms the glut of centers of crystallization of graphite. Subsequent vermicularis modification within 24 hours provides a stable and steady formation of spheroidal graphite cast iron with compacted graphite iron. Temporal break of more than 24 hours between carburizing and modifying the melt processing is undesirable because it leads to burnout members of the cast iron main elements silicon and carbon, which is unacceptable in the production of ductile cast iron. Discharge characteristics vermicularis modifier containing 3...5% magnesium and 3...6% rare earth elements, in quantities less than 0.3% leads to the formation of the structure of cast iron individual inclusions plate shape, which is unacceptable in the production of compacted graphite iron; over 0.8% leads to the formation of a large number of spherical inclusions, which is undesirable in the manufacture of iron with compacted graphite iron. The content of chemical elements in high-strength cast iron with compacted graphite presents the following eutectic composition, wt.%: carbon 2,80...4,50; silicon 1,60...4,50; manganese 1,50 0,01...; copper 0,001...10,0; phosphorus 0,001...to 0.80; sulfur 0,001 1,00...; magnesium 0,0...0,06; iron - rest; following reason. The carbon content is below 2,80% leads to a low fluidity of cast iron and insufficient quantity necessary for the formation of graphite phase; above 4,50% of carbon leads to the formation of samachisa cast iron with reduced technological characteristics and low elongation. The silicon content below 1,60% leads to the formation of chemical compounds of the type Fe3C (cementite); over 4,50% silicon contributes to increased brittleness of cast iron and reduces technological properties. The presence of manganese less than 0.01% contributes to the formation of ferritic metal matrix cast iron, which is acceptable in limited options for production of castings, but at fusion requires the use of ultrahigh-purity charge materials, reducing the profitability of production of iron castings; more than 1.50% of manganese promotes the formation of complex carbides and, consequently, impairs subsequent machining of castings, which is undesirable for the production of engineering castings. The presence of copper less than 0.001% requires the use of clean charge materials that is inappropriate; more than 10.0% of the copper does not increase the strength properties of cast iron. The phosphorus content is lower than 0.001%, it is difficult to provide technically, due to the appreciation of charge material is s; more than 0,80% phosphorus leads to the formation was eutectic, which leads to increased brittleness and hardness. The sulfur content of 0.01% requires spending modifiers, there is no influence on physical-mechanical and technological properties of cast iron; above 1.0% sulfur prevents the formation of compacted graphite, which is unacceptable in the production of ductile cast iron. The presence of magnesium less than 0.01% does not provide the required form of graphite in cast iron; more than 0.06% of magnesium leads to the effect of "premodification and degeneration of the required form of graphite. In the production of cast iron JSC "KAMA-metallurgy tested materials produced and claimed in a known manner, selected as a prototype. On the physico-mechanical properties experienced nodular and compacted graphite iron (chshg and CGI). The results of the comparative data are shown in table 1.
Table of comparative data it is evident that the inventive method allows to obtain cast iron with globular (chshg) and compacted graphite iron (CGI), with: - higher tensile strength 550...820 MPa for chshg and 390...460 MPa for CGI vs. 340 MPa; higher fluidity 248...319 mm for chshg and 235...265 mm for against CGI 210 mm; - increased perception is sustained fashion elongation of 7.5...of 9.8% for chshg and 3.4...4,5% for CGI vs. 1.7%. The inventive method of production of high-strength cast iron with nodular and compacted graphite involves melt one of the possible ways the duplex process: - induction furnace - induction furnace; - induction furnace - electric arc furnace; - induction furnace - furnace; - electric arc furnace - induction furnace; - electric arc furnace - electric arc furnace; - electric arc furnace - a furnace. From the foregoing it is obvious that the inventive method of production allows to obtain different melting aggregates of high-strength cast iron with nodular and compacted graphite with improved physical-mechanical properties due to carburizing nanostructured nagarajaram containing graphite nanostructures, which are the perfect crystallization centers graphite inclusions in the subsequent stable and sustainable spheroidizing or vermicularis modification. 1. Method for the production of ductile irons using nanostructured nauglerozhivatelya, including the melting of the charge in the melting unit, the temperature of the melt processing, primary and secondary modification aged between them, characterized in that the temperature of the melt processing is carried out at 1300-1650°C, per the ranks of the modification carried out carburizing nanostructured nagarajaram in the amount of 0.10 to 0.25% by weight of the melt by the method of injection under the mirror melt, and inoculation spend spheroidizing inoculant containing 5-7% of the magnesium in the amount of 1.2 to 2.0% by weight of the melt, and the time between the carburizing and spheroidizing the modification does not exceed 24 h, and the shutter speed and the modification is carried out until reaching the nodular cast iron next eutectic composition, wt.%:
2. The method according to claim 1, characterized in that the melting unit use induction furnace, electric arc furnace or cupola. 3. Method for the production of ductile irons using nanostructured nauglerozhivatelya, including the melting of the charge in the melting unit, the temperature orbotsoyeva, primary and secondary modification aged between them, characterized in that the temperature of the melt processing is carried out at 1300-1650°C in the primary modification carried out carburizing nanostructured nagarajaram in the amount of 0.10 to 0.25% by weight of the melt by the method of injection under the mirror melt, and inoculation spend vermicularis modifier containing 3-5% magnesium and 3-6% of rare earth elements, in the amount of 0.3-0.8% by weight of the melt, and the time between the carburizing and vermiculation the modification does not exceed 24 h, and the shutter speed and the modification carried out to achieve a compacted graphite iron next eutectic composition, wt.%:
4. The method according to claim 3, characterized in that the melting unit use induction furnace, electric arc furnace or cupola.
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