Method for obtaining high-strength cast-iron with vermicular graphite by intra-mould modification using alloy combinations of fe-si-rem system |
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IPC classes for russian patent Method for obtaining high-strength cast-iron with vermicular graphite by intra-mould modification using alloy combinations of fe-si-rem system (RU 2497954):
    
 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.
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.
 Additives reducing steel grain size, manufacturing methods and use / 2449027
Invention refers to metallurgy and can be used during modification of steel melting with additives in the form of composite material containing high volume ratio of specially manufactured particles. Material includes composition of particles (XaSb) or (XaOb) and element X, where X - one or several elements chosen from group of Ce, La, Pr, Nd, Y, Ti, Al, Zr, Ca, Ba, Sr, Mg, Si, Mn, Cr, V, B, Nb, Mo and Fe, and S - sulphur, O - oxygen, where the above material also includes oxygen, sulphur, carbon and nitrogen; at that, "a" and "b" - arbitrary positive numbers which are determined with total content of elements S, O, C, N and X, where content of sulphur or oxygen is between 2 and 30% of the weight of the above material, while total content of oxygen or sulphur, carbon and nitrogen and the other specified elements chosen from group X is between 98 and 70% of the weight of the above material, and the above material includes high volume ratio of particles (XaSb) or (XaOb) built in metal matrix X.
 Method of producing thick-wall castings from cast iron with spherical graphite / 2440214
Invention relates to metal forming, namely, to producing housings of containers intended for storage and transportation of waste nuclear fuel and other radioactive wastes. Proposed method comprises iron smelting in two furnaces, spheroidising liquid iron in teeming ladle. Iron is filled in charging ladle. Mould consists of outer lateral iron mould, top and bottom half-moulds and central cooled core. Iron is modified in charging ladle by the mix of microcrystalline rich alloys making 0.21-0.6%. Modifying mix consists of alloys Si-Mg, Si-Ba and Si-REM taken in the following ratio: 1:1:(0.5…1.0). Iron is charged into mould cavity is carried out through all feeders at a time after homogenising for 1…5 minutes.
Producing ingots from aluminium alloys by semi-continuous casting / 2430807
Invention relates to metallurgy. Proposed method comprises adding rod-like aluminium oxide particles to crystalliser melt. Said rod is produced in placing aluminium alloy granules into container for them to be heated and formed with crushing granule oxide film to dispersed particles on fitting rod in die hole.
 Method and device for obtaining liquid-solid metal composition / 2404274
Method involves loading of molten alloy (3) to vessel (2), mixing of molten alloy (3) at cooling; at that, mixing is performed by using mechanical mixer (5), and loading of hard alloy (6) to vessel (2). Hard alloy is attached to mixer (5) and loaded to vessel (2) by means of mixer (5). Amount of hard alloy (6) is chosen so that in molten alloy (3) owing to enthalpy exchange between hard alloy (6) and molten alloy (3) there formed are solid particles (7) in amount of at least 1 wt %, but not more than 65 wt %. At least some part of added hard alloy (6) is molten owing to heat transferred to it with molten alloy (3). Device includes vessel (2) with molten alloy (3) and at least one mechanical mixer (5); at that, the above hard alloy (6) is attached to the above mixer (5) and loaded to vessel (2) by means of mixer (5).
Method of manufacturing foundry from grey cast iron / 2384630
There is implemented melting of cast iron, its pouring into non-metallic forms, crystallisation of ingots and heating of ingot located in non-metallic mould in induction-arc furnace up to 1147-1300°C with isolation 0.2-0.5 hours.
 Method of fabricating castings of working wheels of immersed multi-stage centrifugal pumps for oil production (versions) / 2370339
Invention refers to foundry engineering. The method consists in implementation of a casting mould with a gate channel part of which is made in form of a spiral. Behind the spiral section the gate channel is divided in plane of perpendicular axis of spiral into two channels for supplying melt to peripheral and central zones of a working cavity of the casting mould correspondingly. To perform inter-mould modified treatment of melt there is used a mixture containing a component, density of which exceeds density of melt or with bigger dimensions of particles, designed for modification of part of melt filling the peripheral zone of the working cavity and containing a component, density of which is less, than density of melt or having smaller dimensions of particle; it is and designed for modification of part of melt filling the central zone of the working cavity.
 Processing method of liquid copper by nanosecond electromagnetic pulse (nsep) for increasing of its heat- and corrosion resistance / 2355511
Invention relates to foundry field. Method includes heating of melt up to the temperature 1300°C, isolation at this temperature during 5 minutes and melt treatment by nanosecond electromagnetic pulses during 10 minutes.
 Method of grey cast iron treatment by nano-second electro-magnetic pulses (nemp) for improving heat conductivity, corrosion stability and heat resistance / 2354496
Invention relates to foundry production. The method provides for heating and electromagnetic treatment of melt by nano-second electro magnetic pulses. The melt is heated to 1500°C and cured under the above temperature during 5 minutes. The melt is subject to electromagnetic treatment at 1350°C during 10 minutes.
 Method of treatment of liquid aluminium and silumin with nano-second electro-magnetic impulses (nemi) to upgrade their thermo-conductivity / 2347643
Melt is heated to the temperature of 900°C. When temperature is stabilised the melt is treated with nano-second electromagnetic impulses during 10-15 minutes, then it is cooled to ambient temperature.
Complex modifier / 2316609
Complex modifier contains components at next relation, mass%: silicon carbide, 0.2 - 76; copper, 0.2 - 57; magnesium silicide, 0.2 - 47; titanium carbide, 0.1 - 51; calcium, 0.1 - 56; tungsten carbide, 0.1 - 52; boron nitride, 0.5 - 28; vanadium carbide, 0.3 - 39; niobium carbide, 0.5 - 46; cerium nitride, 0.5 - 27; chrome silicide, 0.1 - 81; tantalum carbide, 0.3 - 28; aluminum nitride, 0.5 - 49; molybdenum boride, 0.4 - 71; molybdenum carbide, 0.4 - 52; vanadium boride, 0.1 - 36; tungsten boride, 0.2 - 70; boron carbide, 0.1 - 45; titanium nitride, 0.5 - 60; titanium boride, 0.1 - 50; zirconium carbide, 0.2 - 59; zirconium nitride, 0.5 - 40; zirconium boride, 0.1 - 25; silicon nitride, 0.2 - 70; niobium boride, 0.5 - 15; chrome boride, 0.1 - 65; magnesium carbide, 0.2 - 35; magnesium nitride, 0.5 - 20; magnesium boride, 0.2 - 15; cerium carbide, 0.1 - 50; cerium silicide, 0.2 - 40; cerium boride, 0.1 - 45.
Castings making method / 2268106
Method comprises steps of pouring powder of pseudo-alloy with additives into heated and rotating ingot mold; casting melt iron in liquid-solid state that is quickly solidifies and its heat is transferred to powder of pseudo-alloy. Powder melts not mixing with solidified cast iron and forms on surface of casting wear resistant layer.
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FIELD: metallurgy. SUBSTANCE: 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. EFFECT: stable obtainment in the cast-iron structure of fully vermicular shape of graphite throughout the surface area of all the casting sections without formation of any inclusions of free cementite. 6 dwg
The invention relates to metallurgy, in particular to a method for producing high strength compacted graphite iron (VCUG) form modification. Widely known methods of inoculation to obtain high-strength cast iron with compacted graphite iron (Neteller E. synthesis, properties and application of compacted graphite iron [Text] / E. Neteller // Foundry. - 1986. No. 9. - P.7-9): - introduction to the molten cast iron is insufficient for the graphite spheroidizing hanging type modifier MgFeSi alloy (bucket, form). The disadvantage of this method is a very narrow concentration range of residual magnesium 0,015-0,025%, which is very difficult to sustain in practice produce castings of VCUG (S. p. Korolev Problems and prospects of compacted graphite iron [Text] / S. p. Korolev // Foundry. - 2004. No. 3. - P.6-7; Lithuanian VI vermicular graphite [Text] / V. Litovka, I. Tkachuk, NI beh, E.A. Arystanov // Foundry. - 1989. No. 1. - P.3-6); - deterioration degree of the graphite spheroidizing due to the melt of cast iron titanium (bucket). The disadvantages of this method are very intensive slag formation and contamination of the melt cast iron non-metallic inclusions, as well as the inability to use the return ductile iron for production of high-strength nodular cast iron (ductile iron) (S. p. Korolyov Problems and prospects of compacted graphite iron [Text] / S. p. Korolev // Foundry. - 2004. No. 3. - P.6-7; Lithuanian VI vermicular graphite [Text] / V. Litovka, I. Tkachuk, NI beh, E.A. Arystanov // Foundry. - 1989. No. 1. - P.3-6); - introduction into the melt of cast iron modifiers of the system Fe-Si-P3M (bucket, form). The disadvantages of this method are-side receiving jankovoy (pseudoelasticity) in the form of graphite (otherwise diffuse, dispersed explosive form, preserving the spherical contour), the propensity of iron to chill, and when the ladle method of treatment of molten pig iron increased consumption modifier (Sasari M Getting compacted graphite iron [Text] / M. Sasari, K. Taniguchi, .Yoshida // Imono. I. Jap. Foundrymen's Soc. - 1984. - V.56. No. 5. - P.295-302; Riposan J. Gubeisen mit Vermikulargraphit [Text] / J.Riposan, M.Chisamera // Giesserie-Praxis. - 1985. No. 11. - P.161-173). The present invention is the reduction of the flow modifier, in order to obtain a stable process of obtaining compacted in the form of graphite in cast iron without the formation of inclusions of free cementite. The technical result in the implementation of the invention is to provide a combined method of obtaining high strength compacted graphite iron in form modification on compacted graphite and graphitizing is their modification with low flow modifier, allows to obtain a stable compacted form of graphite in cast iron without the formation of inclusions of free cementite. From the prior art analogues are not detected. The problem is solved in that a method of obtaining ductile iron, whereby the reaction chamber Gating system sleep required the addition of modifier type Fe-Si-RM providing initial concentration of REE in the melt of 0.075%. Then after Assembly of the mold in its filling the Cup to the standard premodification placed a piece FS (GOST 1415-93) weight 0.24 to 0.46 per cent) from the metal form and produce the filling of molten iron from the furnace. Microstructure VCUG 1-m and 8-m (in the direction of molten metal for filling the cavity of the casting) casting details "Shaft distribution obtained using the developed method of inoculation, presented in Fig.1-6. Graphite in the microstructure of cast iron presents fully compacted form. Research conducted on the sources of patent and scientific and technical information, showed that the proposed method for high strength cast iron with vermicular graphite form modification ligatures type Fe-Si-RM with the standard premodification lump ferrosilicon is unknown and is not explicitly ledue is studied from the prior art, that is, 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". A method of obtaining a high-strength cast iron with compacted graphite form a modification of the alloys of the system Fe-Si-REE, characterized in that the reaction chamber Gating system poured a portion of the modifier in the form of alloys Fe-Si-REE, providing the initial concentration of REE in the melt of cast iron 0,075%, then after Assembly of the mold in its filling the Cup to the standard premodification placed a piece FS weight of 0.24 to 0.46% of the metal form and fill with molten iron from the furnace.
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