High-strength nonmagmetic composition steel |
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IPC classes for russian patent High-strength nonmagmetic composition steel (RU 2360029):
 Austenitic corrosion-resistant steel / 2359064
Invention relates to metallurgy field, particularly to development of compositions of alloyed austenitic corrosion-resistant steels for atomic electric power installation with liquid-metal coolant. Steel contains components at following ratio, in wt %: carbon 0.05÷0.1, silicon 0.4÷0.8, manganese 1.0÷1.8, chrome 17.5÷19, nickel 8÷9, niobium 0.03-0.06, vanadium 0.02-0.07, titanium 0.05-0.15, sulphur ≤0.002, tin ≤0.015, lead ≤0.004, iron is the rest. Relation of total content of titanium, niobium and vanadium to carbon is not less than 1.6, and relation of chrome content to total content of nickel and manganese must be in the range 1.7÷2.0.
 Corrosion-resistant steel "НЕРЖСТОМ" for prosthetic dentistry / 2354740
Steel contains carbon, silicon, manganese, chrome, nickel, molybdenum, nitrogen, iron and unavoidable admixtures, at following components ratio, wt %: carbon 0.1-0.2, silicon 1.3-2.5, manganese 1.0-2.5, chrome 19.0-25.0, nickel 15.0-23.0, molybdenum 2.5-5.5, nitrogen 0.04-0.15, iron and unavoidable admixtures - the rest. Equivalents of austenite former and ferrite former are related by following dependence Aequ/Fequ≥0.85, where Aequ=%Ni+30%C+27%N+0.5%Mn, Fequ=%Cr+%Mo+1.5%Si.
Method of receiving incredible cold-rolled sheet made of austenitic steel, containing iron, carbon and manganese, allowing high mechanical properties, and received by this method sheet / 2354716
Sheet is received from austenitic steel, containing, wt %: 0.35 ≤ C ≤ 1.05, 16 ≤ Mn ≤ 24, iron and unavoidable admixtures from smelting - the rest, it is subject to cold rolling, and then recrystallisation annealing in furnace, having an atmosphere, which recovers iron and oxidise manganese, with annealing parametres are chosen so that sheet is coated from both sides by sublayer to the point of amorphous oxide (Fe, Mn)O and external layer of crystalline manganese oxide MnO, with total thickness of these two layers is equal or more than 0.5 micron. Sheet is implemented of steel, additionally containing, wt %: Si ≤ 3.0, Al ≤ 0.050, S ≤ 0.030, P ≤ 0.080, N ≤ 0.1, and, not necessarily, one or more such elements from the group: Cr ≤ 1.0, Mo ≤ 0.40, Ni ≤ 1.0, Cu ≤ 5.0, Ti ≤ 0.50, Nb ≤ 0.50, V ≤ 0.50.
Steel / 2352681
Steel contains, wt %: carbon 0.55-0.65, silicon 0.8-1.2, manganese 1.8-2.2, chromium 2.5-3.5, nickel 0.3-0.5, calcium 0.05-0.1, tungsten 0.1-0.3, phosphorus 0.1-0.3, beryllium 0.01-0.03, antimony 0.001-0.003, boron 0.12-0.16, barium 0.01-0.03, iron - the rest.
Stainless steel / 2350683
Invention concerns ferrous metallurgy field. Particularly it concerns stainless maraging steel, used for manufacturing of highly-loaded details. Steel contains carbon, silicon, manganese, chrome, nickel, niobium, copper, aluminium, nitrogen, strontium, calcium, barium, iron and admixtures, at following ratio of components, wt %: carbon 0.02 - 0.15, silicon 0.15 - 1.5, manganese 0.15 -2.0, chrome 11.0 - 20.0, nickel 2.0 - 10.0, niobium 0.1 - 1.0, copper 1.5 - 5.0, strontium 0.001 - 0.050, calcium 0.001 - 0.10, barium 0.001 - 0.050, aluminium 0.005 - 0.10, nitrogen 0.01 - 0.10, iron and admixtures are the rest. At that there are implemented following relations: (Al+Ca):(Ba+Sr)≥2 and 22≤[Cr+1.5*Ni+0.7*Si+0.75*Mn+0.2*Cu+k*(C+N)]≤32, where k=45±5.
 Heat-resistant alloy / 2350674
Invention concerns metallurgy of heat-resistant alloys with cast structure on the basis of iron-chrome-nickel with carbide strengthening and can be used while creating of units for high-temperature pyrolysis for petrochemical industries. Alloy contains carbon, nitrogen, chrome, nickel, niobium, tungsten, molybdenum, titanium, silicium, manganese, aluminium, copper, magnesium, zirconium, yttrium, boron, cerium, lanthanum, neodymium, praseodymium and iron, at following ratio of components, wt %: carbon 0.35 - 0.55, nitrogen 0.02 - 0.05, chrome 22 - 27, nickel from 25 till less than 40, niobium 1 - 2, tungsten 0.5 - 5, molybdenum 0.2 - 0.6, titanium 0.05 - 0.6, silicon 0.8 - 2.0, manganese 0.8 - 1.5, aluminium 0.1 - 1.0, copper 0.1 - 1.0, magnesium 0.01 - 0.1, zirconium 0.005 - 0.15, yttrium 0.008 - 0.1, boron 0.007 - 0.01, cerium 0.022 - 0.063, lanthanum 0.006 - 0.027, neodymium 0.002 - 0.005, praseodymium 0.005 - 0.008, iron - the rest. At that there are kept correlations %C+%N-((%Nb+2×%Ti)/10)=0.24÷0.28 and (%La+%Ce+%Nd+%Pr)/%B=5÷10.
Steel / 2347005
Invention refers to ferrous metallurgy, particularly to compositions of steel which can be used for fabrication of machine parts operating under friction. Steel contains carbon, silicon, manganese, chromium, nickel, calcium, tungsten, aluminium, phosphorus, sodium, germanium and iron at the following ratio of components, wt %: carbon 0.55-0.65, silicon 0.8-1.2, manganese 1.8-2.2, chromium 2.5-3.5, nickel 0.3-0.5, calcium 0.05-0.1, tungsten 0.4-0.6, phosphorus 0.1-0.3, sodium 0.0001-0.0005, aluminium 0.1-0.2, germanium 0.01-0.03, iron-the rest.
Steel of upgraded corrosion resistance / 2344194
Invention refers to metallurgy, particularly to production of carbonic and low-alloyed steels with upgraded corrosion resistance for fabricating pipe lines transporting liquids aggressive in corrosion respect. Steel contains carbon, manganese, silicon, chromium, nickel, copper, phosphorus, sulphur, aluminium, iron and unavoidable impurities, oxygen including, at the following ratio of components, wt %: carbon 0.03-0.25, manganese 0.15-1.60, silicon 0.01-0.80, chromium 0.01-0.50, nickel 0.01-0.60, copper 0.01-0.30, phosphorus not more, than 0.035, sulphur not more, than 0.010, aluminium 0.01-0.06, oxygen not more, than 0.005, iron and unavoidable impurities - the rest. The maximum alowed value of density of corrosion-active non-metallic inclusions in steel NCANMI (corrosion active non-metallic inclusions)- inclusions/ mm2- is determined depending on oxygen contents in steel in compliance with condition |NCANMI|≤7-1000|O2|, where |NCANMI| is the absolute value of density of corrosion-active non-metallic inclusions, and |O2| is the absolute value of oxygen contents. Manganese contents are determined depending on sulphur contents in compliance with condition |Mn|≤2.0-145|S|, where |Mn| and [S| are the absolute values of manganese and sulphur contents. Additionally steel may contain niobium at amount of 0.01-0.07 wt %, vanadium at amount of 0.01-0.1 wt % and calcium at amount of 0.0001-0.008 wt %. Steel possesses upgraded corrosion resistance, hardness, viscosity, cold resistance and weldability at low production cost.
Steel / 2340700
Steel is used for manufacturing of wear-resisting part, in preference for manufacturing of armor fettling of ball crusher and inter chamber partitions of these crushers. Steel contains carbon, manganese, silicon, sulphur, phosphorus, chrome, nickel, copper, molybdenum, aluminum and iron, at following ratio of components, wt %: carbon 2.0-2.5, manganese 1.20-1.70, silicon not more than 0.5-1.0, sulphur not more than 0.035, phosphorus not more than 0.040, chrome 12-15, nickel not more than 1.0, copper not more than 0.40, molybdenum 0.4-0.6, aluminum 0.01-0.10, iron - the rest.
Steel / 2339730
Invention concerns metallurgy field. Particularly it concerns steel content used in transportation equipment, machine-tool construction, pump-and-compressor equipment. Steel contains carbon, silicon, manganese, chrome, nickel, molybdenum, vanadium, nitrogen, copper, boron, titanium, niobium and iron at following ratio, wt %: carbon 0.25-0.27, silicon 0.3-0.5, manganese 4.9-5.3, chrome 0.9-1.5, nickel 0.9-1.5, molybdenum 3.4-4.8, vanadium 0.4-0.45, nitrogen 0.07-0.15, copper 0.9-1.7, boron 0.005-0.1, titanium 0.1-0.2, niobium 0.3-0.5, iron is the rest.
Method of receiving of chrome-bearing alloy / 2354735
Invention can be used for processing of chrome ore, concentrates and aluminium-bearing wastes of non-ferrous metallurgy. In the method in the capacity of aluminium-bearing material it is used preprepared aluminium-bearing wastes from manufacturing of secondary aluminium in amount 0.6-1.1 wt % per 1 wt % of content Cr2O3 in chrome-ore concentrate. Isolation of received in furnace melt is implemented with blending during 10-15 minutes, after which it is preliminary pumped out in slag pan 70-90% of dross major part from the total dross mass, then it is pumped out part of the rest slag into metallic reservoir, isolated during 3-5 minutes and discharged the rest part and metal to the same metallic reservoir.
 Extraction method of metallic element, particularly metallic chromium, from charge containing metal oxides in arc furnace / 2352672
Invention relates to extraction method of metallic elements, particularly, metallic chromium from slag, which contains oxides, particularly chrome oxide, in arc furnace. Additionally slag is not reduced at separated stage after melting, but there are implemented following stages: after charge introduction into arc furnace it is melted, forming molten metal and slag. Melt is discharged, keeping unreduced slag in furnace. Then it is fed following scrap portion, including reducers for slug. At melting of this charge slag is reduced. Then slag and melt are merged. Method can be used also in aggregates of ladle or convertermetallurgy.
Method of receiving products made of iron with carbon alloy / 2352671
There are received products from alloy of iron and carbon with carbon content more than 2.14 wt % by means of melting, melt heating till the temperature for 400-600°C higher of eutectic temperature, isolation at this temperature no less than 10 minutes, ingot plastic deformation at the temperature higher than 600° and following cooling till the ambient temperature in water. Sulfur content in alloy is provided, not exceeding 0.001 wt %, phosphorus - not exceeding 0.01 wt %.
Melting method of ferrotitanium / 2351678
Invention relates to metallurgy field. Particularly it relates to production of ferroalloys by aluminothermy process. In the method in the capacity of titanium-bearing raw material it is used liquid titanic slag, it is mixed metallothermic part of charge, consisting of iron-ore concentrates, aluminium powder, lime and ferrosilicium in relation 1:(1.09-1.18):(0.27-0.33):(0.08-0.09) agreeably, in amount 126-146% of titanium slag mass, then it is mixed and penetrate main part of charge, consisting of iron-ore concentrate, lime and aluminium powder in relation 1:(0.1-0.29):(0.43-0.46) agreeably, in amount 15-25% of titanium slag mass. In the capacity of titanium-bearing raw material it is used liquid titanic slag with content 85-95% % TiO2 at temperature 1700-1850°C.
 Method of concentrates treatment from ore, containing oxides of ferric, titanium and vanadium and facility for its implementation / 2350670
Method is implemented by means of liquid-phase recovery of metals from oxides of concentrate batches, consisting of main and additional parts, in conditions of melt revolution by electromagnetic field. During the melting it is effectively used centrifugal effect, accelerated fused fed for melting charge, containing concentrate, and in it there are selectively recovered metals from oxides. At that likewise accelerated iron is diluted in aluminium while production of ferroaluminium. Method is implemented almost excluding gas emission from melt. Facility for method implementation is outfitted by collector circulating ferrosilicium that simplifies process of charge treatment, reduces treatment time of each regular charge batch. Under the bottom of circulating ferrosilicium collector there are located induction units which are equal in structure to induction units, located around walls and under the bottom of assembly that provides decreasing of costs for induction units manufacturing and for electricity supply.
Method of manganese ore reducing fusion / 2348727
Invention concerns pyrometallurgy. Particularly it concerns production of ferromanganese, and provides excluding of formation of dump waste slag at extraction of manganese from ore. In method it is implemented forming in furnace of reactionary capacity on the basis of fluorite melt, charging and reducing fusion of manganese ore, discharge from furnace of slag and ferromanganese. Before discharge from furnace of slag and ferromanganese into reactionary capacity it is add manganese ore in amount, depending on content of manganese in ore, content of manganese in slag and slag mass in furnace, till the receiving of slag with content 10-20% of manganese, used for preparation of welding flux.
 Charge for melting of high carbon ferromanganese / 2347835
Invention refers to metallurgy, particularly to processing of manganese raw material by melting in ore reducing furnaces. Charge contains manganese raw material, carbon reducer and flux. As manganese raw material there is used mixture of concentrate of rare phosphorous manganese ore with ratio P/Mn=0.0052-0.042 and high grade manganese ore with ratio P/Mn≤0.0021 at following ratio of components, wt %: carbon reducer 12-18, flux 8-20, concentrate of rare phosphorous manganese ore with ratio P/Mn=0.0052-0.042 5-40, high grade manganese ore with ratio P/Mn≤0.0021- the rest. The invention facilitates processing low grade native manganese containing materials.
 Method of electroslag melting of ferrotitanium / 2346994
Invention refers to special electrometallurgy and is designed for production of ferrotitanium of high quality out of titanium and steel chips. Melting of titanium and steel chips is performed in a slag bath in a water-cooled crystalliser by means of supply of electric current into slag through a non-consumable graphite electrode. Chips are loaded into the crystalliser by portions at amount of 20-50% from the total weight of chips. After melting of each portion of chips density of current is lowered at the electrode at 50-70% relative to density of current of melting and holding is carried out at lowered current density during 1-5 minutes. Further next portion of chips is melted.
Method of alumino-thermal production of ferro-titanium / 2338805
Invention refers to metallurgy of high-melting rare metals, particularly to metallurgy of titanium, and can be used at production of ferro-titanium for alloys on base of titanium and structural items. The method consists in out-of-furnace alumino-thermal reduction; ore titanium concentrates are used as titanium containing element of charge; elements of charge are mixed till obtaining the ratio of iron and titanium oxides 1:(1.0÷3.0) of wt, calcium oxide 0.2÷0.5 from the total weight of titanium and iron oxides and aluminium till obtaining ratio of total contents of titanium and iron oxides to aluminium as 1:(0.45÷0.55). Before reduction charge is heated to the temperature of 800-1000°C in inert medium and held to equalise temperature in charge volume; the process of reduction is initiated by firing of charge followed by heating turn off.
 Method of melting of ferronickel out of oxidised nickel ores and products of their concentration and assembly for implementation of this method / 2336355
Inventions refer to metallurgy and can be used fro production of ferronickel with various contents of nickel out of Ural and other oxidised nickel ores. The assembly is equipped with injectors for blowing dust into slag melt, the said dust caught in gas cleaning system while carried out with exhaust gases out of a chamber. Fuel oxygen burners are installed in side walls of the chamber above the level of the slag melt at 0.5-1.2 m at an angle of 15-60° to the surface of the melt and at an angle of 35-65° to the lengthwise axis of the assembly, while nozzles of the injectors for blowing into the slag melt carbon containing materials and dust caught in gas cleaning and carried off with exhaust gases out the chamber are installed at 0.25-0.60 m above the level of reduced metal. Heat exchangers of cooling circuit of liquid metal heat carrier are connected via nitrogen lines with injectors installed in the walls of the chamber, the said injectors facilitate injection of carbon containing materials and caught in gas cleaning and carried off by the exhaust gases out of chamber dust in a stream of heated nitrogen.
Wearproof sintered alloy on basis of iron / 2359056
Invention relates to powder metallurgy, particularly to compositions of wearproof sintered alloys on the basis of iron. It can be used in mechanical engineering. Alloy contains, wt %: manganese 4.0-5.0; chrome 4.0-4.5; molybdenum 1.0-1.5; copper 1.5-2.0; nickel 4.0-4.5; boron 0.2-0.3; tungsten 1.0-1.5; germanium 0.01-0.015; stibium 0.003-0.005; iron - the rest.
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FIELD: metallurgy. SUBSTANCE: invention relates to metallurgy field, particularly to composition of high-strength non-magnetic corrosion-resistant composition steel, used in mechanical engineering, aircraft building, special shipbuilding, instrument making and at creation of high-performance drilling engineering. Steel contains carbon, silicon, manganese, chrome, nickel, nitrogen, niobium, molybdenum, vanadium, zirconium nitride, iron and unavoidable admixtures at following ratio of components, wt %: carbon 0.04 - 0.12, silicon 0.10 - 0.60, manganese 5.0 - 12.0, chrome 19.0 - 21.0, nickel 4.0 - 9.0, molybdenum 0.5 - 1.5, vanadium 0.10 - 0.55, niobium 0.03 - 0.30, nitrogen 0.4 - 0.7, zirconium nitride 0.03 - 1.00, iron and unavoidable admixtures are the rest. Zirconium nitride is in the form of particles with nano-dispersibility. EFFECT: there are increased strength properties of steel at simultaneous increasing of plasticity and viscosity index. 2 cl, 2 tbl, 1 ex
The invention relates to the field of metallurgy and can be used in mechanical engineering, aircraft construction, shipbuilding, instrument and to create a high-performance drilling equipment. Known non-magnetic steel of the following chemical composition, wt.%: carbon 0,01-0,05; chrome 21,0-24,0; manganese 12,0-15,0; Nickel 1,0-8,0; nitrogen 0,65-0,80; molybdenum 0,5-1,0; vanadium 0,25-1,0; calcium 0,0015-0,020; iron rest (Ed. mon. The USSR №1225876, M CL SS 38/58, publ. 23.04.1986). The disadvantage of steel is insufficiently high performance ductility and toughness and development of intergranular corrosion due to the presence of vanadium in steel, which is bonded to the nitrogen and carbon forms nitrides and carbides of vanadium, released during solidification boundaries of austenite grains. In addition, vanadium as territooriumil element promotes the release of the ferromagnetic phase (δ - ferrite), increasing the magnetic permeability. Closest to the technical essence and the achieved result is a high-strength non-magnetic corrosion-resistant weldable steel of the following chemical composition, wt.%: the carbon of 0.04 to 0.9, the silicon of 0.10 to 0.60, manganese 5,0-12,0 chrome 19,0-21,0, Nickel 4,5,0-9,0, molybdenum 0.5 to 1.5; vanadium 0,10-0,55; calcium 0,005-0,010; niobium 0,03-0,30, nitrogen 0,40-0,70; unavoidable impurities and iron rest. For values of concentrations of alloying elements in the filled condition: [Ni]+0,1[Mn]-0,01[Mn]2+18[N]+30[C]/[Cr]+l,5[Mo]+0,48[Si]+2,3[V]+l 75[Nb]=0,70-0,90, where [N], [C], [Si], [Mn], [Ni], [Cr], [Mo], [V], [Nb] is the concentration of nitrogen in steel, carbon, silicon, manganese, Nickel, chromium, molybdenum, vanadium and niobium, respectively, expressed in mass percent. The ratio of carbon to nitrogen content is 0.05 to 0.15. In addition, steel has developed subgrain structure after hot plastic deformation at a temperature of 1000-1050°C With compression 50-80% and then cooled in water to room temperature. The steel has a fine-grained austenitic structure after quenching in water from a temperature 1030-1070°C (RF Patent No. 2205889, M CL SS 38/58, publ. 06.10.2003, prototype) The disadvantage of this steel are not high performance ductility and toughness of steel, since the presence of strong carbide - and nitridebased elements niobium and vanadium will lead to selection of large size as carbides and nitrides of niobium and vanadium boundaries of austenite grains during solidification of steel that will reduce the characteristics of ductility and toughness. The problem solved by the invention is to obtain a steel having high strength with high ductility and toughness. This task is solved in that a high-strength non-magnetic corrosion-resistant composite is tal, includes carbon, silicon, manganese, chromium, Nickel, nitrogen, niobium, molybdenum, vanadium, iron, further comprises a nitride of zirconium in the following ratio, wt.%:
Steel contains a nitride of zirconium in the form of particles with nanoscale dispersion. The introduction of the steel fine nitrides of zirconium with nanoscale dispersion will form a large number of crystallization centers uniformly distributed in the volume of metal is A. In the process of hardening steel chemically resistant particles of zirconium nitride, while in high melting have increased resistance to dissociation and will be the inoculators, centers of crystallization of austenite grains, which will significantly solicit primary austenitic grain will increase the area of the boundaries of austenite grains, as well as increase the rate of solidification of castings. This will greatly reduce the number and increase the dispersion of the carbides and nitrides of vanadium and niobium, drop down along the boundaries of austenite grains, which ultimately will lead to an increase in strength properties and at the same time indicators of ductility and toughness. When the content in the steel of fine nitrides of zirconium in an amount less 0.03 wt.% does not increase the strength properties, because no sufficient grinding grain and stabilization of grain boundaries. When the content of nitrides of zirconium more than 1.00 wt.% occurs deterioration of ductility and toughness, as nitrides of zirconium start to stand out in excess at the grain boundaries. Thus, the technical result of the invention is to improve the strength properties of steel while increasing performance ductility and toughness. Example. Steel produced in an open primary and zuccinni furnace with a capacity of 160 kg method of welding stainless nitrogen-containing waste and clean ferroalloys. Nitrogen was introduced into the composition of the nitrided steel waste and nitrided ferroalloys chromium and manganese. The zirconium nitride was obtained by the SHS method in the mode of filtration combustion. After nitriding sintered zirconium nitride was crushed, and crushed to particles less than 100 nm in a ball mill for 5 minutes. The nitride Zirconia was introduced in metal capsules stream of metal with the release of melt in the ladle. Metal is poured from above into ingots weighing 130 kg with a diameter of 150 mm, the Ingot was heated in a gas furnace to a temperature 1175-1220°C and forged at a temperature not lower than 1050°C for clamping section 70×70 mm Of rods made of longitudinal specimens for tensile and impact strength, which was subjected to heat treatment by quenching in water from 1050°C. The metal structure was studied by metallographic microscope Neophot-2. Phase composition of the steel was determined by x-ray diffractometer DRON-3M. Mechanical tensile test according to GOST 1497-80 were performed on a universal testing machine Type u-10, and tests for impact strength - impact-testing machine KM-30 according to GOST 9454-80. The results of chemical analysis of the proposed steel shown in table 1. The test results presented in table 2. Test results shows that the proposed steel has higher strength at elevated characteristics of plasticity is the viscosity, that will increase the durability of products made from this metal.
1. High strength non-magnetic corrosion resistant composite steel containing carbon, cream the s, manganese, chromium, Nickel, nitrogen, niobium, molybdenum, vanadium, iron and unavoidable impurities, characterized in that it further comprises a nitride of zirconium in the following ratio, wt.%:
2. The steel according to claim 1, characterized in that it contains a nitride of zirconium in the form of particles with nanoscale dispersion.
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