Alloy for alloying of steel with titanium |
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IPC classes for russian patent Alloy for alloying of steel with titanium (RU 2482210):
Method for production of aluminium-zirconium ligature (versions) / 2482209
For production of aluminium-zirconium ligature, aluminothermal recovery of zirconium is carried out from its compounds in the environment of melted metal halogenides. Zirconium is recovered from its fluoride or oxide, and also from fluozirconate or oxifluozirconate of alkaline or alkaline-earth metal in presence of potassium chloride, sodium fluoride and aluminium fluoride, introduced into the melt or formed in the process of aluminothermy. The temperature of the process amounts to 850-1150°C. Recovery is carried out under the layer of chloride cover flux, containing potassium and sodium chlorides at the following ratio of components, in the mixture, wt %: potassium chloride 42-45, sodium chloride - balance. The melt is soaked for 15-30 minutes, and bars are poured. The invention makes it possible to produce bars of ligature with homogeneous structure with dimensions of intermetallides of up to 15-30 mcm, at the same time non-return losses of zirconium are reduced down to 7-9%, environmental characteristics of the process are improved.
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.
Method for obtaining nitrogen-containing alloy for alloying of steel and cast iron, and nitrogen-containing alloy for steel and cast iron alloying / 2479659
Bearing titanium-chrome ferroalloy is crushed to powder with particle size of less than 0.2 mm. Titanium-chrome ferroalloy contains the following, wt %: chrome - 5.0-35.0, titanium - 15.0-30.0, aluminium - 5.0-10.0, silicon - 5.0-8.0, and iron is the rest. Total amount of Ti, Cr, Si, Al is 30.0-82.0 wt %. Powder is loaded to the container that is moved to a SHS reactor; an exothermic burning reaction is initiated in a layer-by-layer mode at nitrogen pressure of 1.0-15.0 MPa.
 Method for obtaining aluminium-titanium alloy combination (versions) / 2477759
Invention refers to non-ferrous metallurgy and can be used for obtaining alloys based on aluminium. In order to obtain aluminium-titanium alloy combination, alumino-thermal reduction of titanium from its compounds is performed in the environment of molten halogenides of metals. Titanium is reduced from its fluoride or oxide, as well as from fluorotitanate or oxyfluorotitanate of alkali or alkali-earth metal in presence of potassium chloride, sodium fluoride and aluminium fluoride, which are introduced to molten metal or formed during aluminothermic process. The temperature of the process is 850-1150°C. Reduction is performed under the layer of covering flux chloride, which contains potassium and sodium chlorides at the following ratio of components in the mixture, wt %: potassium chloride 42-45, sodium chloride is the rest. Molten metal is exposed during 15-30 minutes and poured into billets. The invention allows obtaining billets of the alloy combination with homogeneous structure with intermetallides with the size of up to 15-30 mcm, reducing non-collectable titanium scrap to 7-9% and improving environmental characteristics of the process.
Foundry alloy for casting heat-resistant titanium alloy and method of its making / 2470084
Invention relates to metallurgy of nonferrous metals, particularly, to production of foundry alloy for alloying refractory titanium-base alloys. Proposed composition contains the following substances, in wt %: tungsten 48.0-52.0, titanium 10.0-20.0, hafnium 0.08-0.1, aluminium making the rest. Charge is smelted in vacuum arc furnace with nonconsumable tungsten electrode. Note here that at first step, titanium placed on bottom of copper water-cooled casting mould and tungsten of higher density is placed there above. Titanium and tungsten are dissolved and melted in proportion corresponding to their content in foundry alloy to make integral ingot at arc current between charge and electrode of 750-1100 A and melting time of 3-10 min. To average ingot chemical composition, ingot is removed from casing mould to subject it to remelting at temperature higher than liquidus temperature of the alloy of titanium and tungsten. Then, required amount of aluminium and hafnium is added to remelted ingot to be placed under aforesaid ingot to proceed with melting at 1750-1900°C.
 New generation nanomodifier (ngnm) / 2468110
Complex modifier contains the following components, wt %: fullerenes 0.1-27, nanosized composite particles of metal carbides selected from the following group: cobalt, iron, nickel 1-43, nanosized composite particles of cobalt 0.2-20, nanosized particles of lanthanum 0.1-29, nanosized composite particles of tungsten 0.5-42, nanosized composite particles of cerium 0.7-33, nanosized composite particles of iron 1-41, nanosized composite particles of nickel 0.6-36, nitrides or silicides or borides or oxides or carbonitrides of metals - balance.
Method of producing aluminium alloys with transition metals / 2467086
Invention relates to nonferrous metallurgy and may be used in production of foundry alloys based on aluminium with transition metals. It comprises making aluminium melt overheated to above alloy liquidus temperature and adding alloying components into melt by fusing the wire. Note here that electric current flows between wire and aluminium melt. Layer of fused flux is produced on aluminium melt surface while said wire is fused by heat released in flux layer at electric current existing therein. Note also that said flux contains cryolite - 40-45 wt %, aluminium oxide - 10-20 wt %, and magnesium fluoride - 35-40 wt %.
 Method for obtaining aluminium-titanium-boron alloy combination / 2466202
Method involves melting of primary aluminium, batch introduction to molten aluminium of titanium-containing and boron-containing components, mixing of molten metal and its pouring, cooling and heat treatment. As titanium-containing component there used is potassium hexafluorotitanate K2TiF6 in quantity of 10÷35 wt %, and as boron-containing component there used is crystalline boric acid H3BO3 in quantity of 4÷10 wt %. Titanium-containing and boron-containing components are pre-mixed and packed into cover from technical aluminium with weight of 0.2÷0.6 kg; packed components are added in portions to molten aluminium with temperature of 950÷1050°C; after that, molten metal is mixed and exposed during 0.2÷0.5 hours, and pouring of alloy combination is performed at molten metal temperature of 800÷850°C to water-cooled moulds with ratio of dimensions of length of casting to height and width of 15÷25:1÷1.5:1.5÷2 and weight of casting of 1.5÷2.5 kg; at that, cooling of molten metal in moulds is performed at the rate of 200÷250°C/min.
Aluminium alloy combination obtaining method / 2464337
Aluminium molten metal is prepared and heated over temperature of 950-1000°C. Liquid flux layer of the following composition, wt %, is induced on aluminium molten metal: cryolite 80-85 and aluminium oxide 15-20. Liquid flux is heated over solution temperature of alloying component with electroslag process and alloying component is added in the required quantity.
 Method to obtain nitrogen-containing ligature / 2462526
To obtain the ligature the source alloy containing 40-85% vanadium, 2-57% of iron and one or more elements selected from a number of calcium, aluminium, silicon, carbon and manganese in an amount of 1.0-21.0%, the powder is milled with a particle size of less than 1.5 mm, the powder is placed in an atmosphere of nitrogen with a purity not less than 99.0% at pressures above 0.1 MPa, an exothermic reaction of creation of vanadium nitride is initiated by local heating of the part of surface layer of the powder; the powder is saturated with nitrogen in so-called self-propagating high-temperature mode of synthesis (SHS) to obtain a composite alloy based on vanadium nitride with the density of 4.0-7.0 g/cm3, which consists of vanadium nitride in an amount of 44-92% and a binder alloy, which is an iron-based alloy comprising at least two elements selected from a number of calcium, aluminium, silicon, carbon, manganese and vanadium in an amount 1.0-20.0% and having a start of melting temperature less than 1500°C.
 Method of making steel flat products / 2481407
Steel smelting is performed, steel is refined to obtain that containing the following substances in wt % 0.25-0.35 of C, 0.6-0.7 of Si, 0.6-0.9 of Mn, 0.10-0.15 of Al, 0.70-0.95 of Ni, 3.1-3.3 of Co, 0.4-0.6 of Cu, 2.9-3.3 of Cr, 0.4-0.5 of Mo, 0.1-0.2 of V, not over 0.005 of S, not over 0.005 of P, Fe making the rest, ingots are cast and casting is terminated at temperature, at least 8°C higher than liquidus temperature. Obtained ingots are heated and subjected to multipass blooming in lengthwise direction with total relative reduction of, at least, 85% for production of slab. Said slab is subjected to rolling in several steps. Note here that, in first step, slab is reduced to sheet depth 2-10 times larger than final depth and cooled by water at the rate of 400°C/min. Then, sheet is heated to, at least, 900°C and rolled to final depth at rolling end temperature of, at least, 650°C and subjected to water tempering immediately. Low-temperature tempering is performed in, at least, 8 h at 100-200°C.
 Method for steel making with low sulphur content / 2479636
Method involves production of a semi-finished product in a steel making unit, steel tapping to a ladle, cutoff during furnace slag tapping, addition to the ladle at tapping of solid slag-forming mixture, and out-of-furnace treatment at a furnace-ladle unit. At tapping, solid slag-forming mixture in quantity of 2.0-2.7 kg/t consisting of lime 75-80 wt % and fluorite-sellaite concentrate 20-25 wt % is added to the ladle; treatment is performed at the furnace-ladle unit during 45-75 minutes; at that, in order to complete metal desulphurisation, the same solid slag-forming mixture in quantity of 0.3-0.6 kg/t consisting of lime 75-80 wt % and fluorite-sellaite concentrate 20-25 wt % is added to the ladle; steel is blown with argon during treatment through bottom porous tuyere blocks with flow rate of 20-50 m3/h.
Boron steel making method / 2477324
Following operations are performed: steel making, deoxidation, out-of-furnace treatment, addition of ferroboron and argon blowing through bottom tuyeres, pouring at a continuous casting machine so that a billet is obtained, heating of the billet in a continuous furnace, rolling to the specified profile size; at that, melting and out-of-furnace treatment is performed so that the steel containing the following, wt %, is made: carbon 0.36-0.39, boron 0.001-0.003, aluminium 0.015-0.045, and after the billet is obtained, the content of silicon, manganese, aluminium and titanium is determined; the billet is rolled to the required dimensions; at that, the rolling end temperature is specified based on the required hardness value.
Method for obtaining magnesian modifying agent / 2476608
Method involves mixing of products containing magnesium compounds and/or carbon component, which form gaseous agent at heating, magnesian component burned in rotating and/or shaft furnace and binding substances, briquetting or granulation. At the mixing stage, the charge composition additionally contains unburned calcium-containing component, and at least one of burned magnesian components is introduced in the form of a fraction with size of less than 0.088 mm, which is obtained by means of complete or partial grinding, or caught in aspiration systems of material burning furnaces.
 Device for degassing steel melt furnished with perfected exhaust sleeve / 2473704
Device comprises teeming ladle 3, vessel 2 arranged there above, inlet sleeve 4 with device 5 fitted therein for gas blowing, and discharge sleeve 1. Exhaust sleeve 1 is arranged nearby edge 9, in radial direction relative to central lengthwise axis 6 of exhaust sleeve, with at least one opening 7.
Method of removing titanium from high-chromium melts / 2471874
Method comprises tapping metal from furnace to ladle, building CaO-SiO2-MgO-system slag up on metal melt surface, and adding iron chloride as chlorinating agent to liquid slag. Then, melts are soaked to termination of reaction of titanium removal from metal in gas phase in the form of volatile titanium chloride. To accelerate reaction of refinement and removal of titanium chlorides from reaction zone, the melts are blown by neutral gases, for example, argon or carbon oxide.
 Flux cored wire for out-of-furnace treatment of iron-based molten metals / 2471001
Filler of flux cored wire contains the following components, wt %: metal magnesium 30-50, calcium 10-15, alloy of calcium and silicon 30-50, fluor spar up to 5%, total content of metal barium or mixture of metal barium and barium silicide 10-20, and iron is the rest. Total calcium content is 20-50% of filler content.
 Repair method of vacuumiser branch pipe lining / 2469101
Method involves application of refractory mass to the product to be repaired, lowering of hot vacuumiser with branch pipe on it; for that purpose, repairable product is manufactured by means of casting the concrete into the mould; the above product has inner cylindrical hole equal to diameter of hole of branch pipe in original form, and outer diameter is less by 5-25 mm than diameter of used lining of branch pipe.
 Supply sleeve for degassing reservoir for metallurgical melts operating using rh method / 2468092
Invention refers to the field of metallurgy, and namely to circulation vacuumising of liquid steel. The supply sleeve of the degassing reservoir comprises areas of supply with tubular blowers for introduction of inert gas, distributed along the axial length of the sleeve. Between areas of inert gas supply there are separate sections provided with conducting elements arranged in the form of grooves. Conducting elements stretch upwards in direction of the longitudinal axis of the sleeve and are twisted in its respect by the angle equal to 20° - 45°.
 Carcass for wire coil intended for immersion in molten pool / 2467939
Invention relates to metallurgy, particularly, to coil of powder wire to feed substances into molten pool. Proposed carcass comprises struts to tighten said coil with inner sides getting in contact with outer layer of wire coil. Inner sides of struts are provided with means for reinforcing contact between said struts and wire by increasing adhesion of wire coils or by retaining them at seats made in said struts. Said means are composed of the layer of high-adhesion material, for example, rubber, or by corrugation of strut inner wall, or rods arranged thereon, or roughness made thereon.
 Device for treatment of liquid metal / 2244021
The invention is dealt with the field of metallurgy. The device for treatment of liquid metal contains a rotor (9) and is intended for treatment processing treatment of molten metals in a reactor (20) or any analogous device. A gas and-or solid particles are fed into metal mainly through the shaft (8) of the rotor through made in it holes (18) from cavity (16) of the rotor. The shaft (8) passes upward through the base of the reactor (20) with a capability of rotation inside a pipe (3) of a stator. The pipe passes upward from the base of the reactor. The shaft of the rotor and the pipe (3) of the stator are passing through a hole (21) in the lower part of the rotor (9) into a cavity (16) of the rotor. The shaft (8) is fused with the rotor (9) by a fastening tool (13) inside the cavity (16). The pipe (3) of the stator is ended in the cavity (16). The technical result is an increase of service life of the shaft of the rotor, reduction of price of the device.
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FIELD: metallurgy. SUBSTANCE: alloy contains the following components, wt %: titanium 45-75, silicon 5-45, aluminium 5-15, carbon not more than 0.2, iron - balance, at the same time the mass ratio of titanium to aluminium is within the limits from 3:1 to 15:1. EFFECT: invention makes it possible to melt steel with specified narrow limits of titanium at minimum consumption of ligature, and provides for minimum contamination of a metal with hazardous admixtures. 6 cl, 1 tbl
The invention relates to ferrous metallurgy, in particular to the alloy to alloy, and is intended for use in the smelting of such steels. Currently, titanium is widely used for alloying steels of different grades. The greatest amount of production of such brands accounted for the low-alloy steel, intended for the manufacture of pipes, building materials, fasteners and other positive actions titanium on steel properties are increased toughness, strength, corrosion resistance, wear resistance and cold resistance. The improvement of physico-mechanical properties of the metal mainly due to the formation of nitrides, carbides and carbonitrides of titanium. In particular, in low-alloy steels the formed titanium nitride increase their strength and durability. In stainless steels titanium is used to increase their plasticity, which is achieved by coupling in nitrides tverdorastvornogo nitrogen. In these steels titanium forms carbides of titanium, thus preventing the formation of chromium carbides at heating and increasing the resistance of the metal to intergranular corrosion. In boron steels titanium is an indispensable technological additive used to protect the boron from nitriding. Difficulty is ispolzovanie titanium as an alloying element in steel related mainly to its high chemical affinity to oxygen. Eskikaya ability titanium is much higher than other microeconomic components: V, Nb, V, etc. the Problem of reducing smoke titanium relevant to this day and requires decisions to ensure the required concentration in steels in a narrow range, which is especially important for achieving consistently high qualities of modern steels. Currently used alloying titanium containing materials often contain significant amounts of impurities non-ferrous metals and gases (si, Sn, Zn, N, O, H, and others), and in some alloys increased concentration of C, S and R. This is often the reason for the decline in quality metal and even zabramski separate heats. Traditionally for alloying steels titanium is used ferrotitanium, manufactured according to GOST 4761-91. Depending on the method of obtaining it is produced with high (~70% Ti)and low (~40% Ti) titanium content. High-grade ferrotitanium usually obtained by a method of melting titanium containing waste in induction furnaces. Ferrotitanium with ~40% titanium produce secondary recovery of ilmenite concentrate in a special melting aggregates. As the charge materials used ilmenite concentrate, iron ore, aluminum powder, ferrosilicon and lime. In both cases, ferrotitanium is characterized by a high concentration of hydrogen, nitrogen and sour the ode, and in some cases non-ferrous metals. In addition, the use of this alloy is only possible with careful preliminary deoxidation of the steel melt. Known alloy based on titanium (U.S. Pat. Of the Russian Federation No. 2335564, publ. 10.10.2008, B. I. No. 28), contains, wt%:
This alloy is produced by two-stage melting of the starting components. In the first phase of the blend containing ilmenite, iron and/or steel scrap, electrode fight and/or coke, lime and/or limestone, to remove containing titanium oxide slag and part of the iron melt. In the second stage in an electric arc furnace melt crushed slag first stage with aluminum. The invention allows to obtain the finished product in the form of a compact commodity ingot with a specified content of titanium that can be used in the smelting of various steel grades. However, this alloy contains almost no high-level elements that would reduce the frenzy of titanium. Therefore, when using the alloy will be elevated oxidation, which ultimately will lead to a higher share of the consumption. In addition, such ligatures received the above method, usually include a considerable amount of hydrogen that can impair the quality of any metal. More effective in the application of complex titanium containing alloys, including strong eskikaya elements, which prevent the oxidation of the titanium. One such alloy that is selected as a prototype of the claimed invention, an alloy containing, by weight.%:
This alloy contains a small amount of aluminum and silicon, which have high affinity to oxygen. So much of these elements to some extent helps to protect titanium from oxidation, therefore, can increase the degree of mastering. At the same time, the alloy prototype is characterized by a low content of titanium, and its use requires a specific consumption ligatures, resulting in the constant increase of metal. Thus, in the present invention the task of creating a new alloy, which at its minimum flow would allow to melt steel with specified narrow concentration limits for titanium and ensure minimum contamination of the metal harmful impurities. The problem is solved in that the proposed alloy comprising titanium, silicon, aluminum, carbon and iron, in which the components are taken in the following ratio:
the ratio of titanium to aluminum is in the range from 3:1 to 15:1. It was found experimentally that the high absorption of titanium is achieved when the content of 45-75%. The content less than 45% of Ti is impractical, as in this case will have an increased flow rate of the alloy. Increasing the concentration of titanium over 75% reduces the degree of assimilation due to the decrease in deoxidizing elements. The best results were obtained when the concentratie titanium from 60 to 70%. To increase the absorption of titanium alloy which has both strong eskikaya elements, aluminum and silicon. Having a high chemical affinity to oxygen, aluminum and silicon are actively engaged in metal with dissolved oxygen, preventing oxidation of the titanium. In addition, their presence is compatible with the composition of the majority of such steels. Silicon is widely used steel for deoxidation and alloying, its content is regulated in many of such steels. The lower concentration limit of silicon in the alloy of 5% corresponds to the minimum number, which begins to show its eskikaya ability. The upper concentration limit of silicon is limited to 45%, with the higher its content in the steel will be an excessive amount of silicon, which will contribute to increased formation of silicate compounds. The optimal concentration limits for silicon are 13-18%. Aluminum is one of the most strong deoxidizing elements of steel. In this technical solution, the amount of aluminum is selected in the range of 5-15%. When the aluminum content is below 5% eskikaya the ability of the alloy drops, which leads to a high frenzy of titanium. When the content is higher than 15% in metal is formed higher concentration of oxides of aluminum is of, which degrade the quality of the metal, reducing its physical and mechanical properties and surface quality of the casting due to the formation of a large number of non-metallic inclusions. The optimum amount of aluminum is 8-12%. In the best embodiments of features alloy containing calcium in an amount of from 0.1 to 15%. Calcium effectively reduces the concentration of active oxygen in the steel tub even with a small addition. In addition, calcium has the ability to improve the quality of the metal modification of non-metallic inclusions and removing the sulfur through the formation of sulfide CaS. The lower concentration limit of calcium in the alloy of 0.1% corresponds to the minimum number, which begins to show its eskikaya ability. When the calcium concentration in the alloy > 15%, the formation of the metal increased amount of oxide, which can cause graciloplasty steel. Experimental studies have found that to achieve a given technical effect in the present invention between the concentrations of titanium and aluminum must follow the strict ratio. For high and stable absorption of titanium melt by protecting it from oxidation and to prevent the introduction of excessive amounts of aluminum ratio t is tan to aluminum should be in the range of from 3:1 to 15:1. When the ratio of titanium to aluminum of more than 15:1 the aluminum content is not enough to "protect" titanium from oxidation. At a ratio less than 3:1 in steel appears excessive amounts of aluminum, which is undesirable due to excess formation of non-metallic inclusions. Best results are obtained when the ratio of titanium to aluminum of from 6:1 to 8:1. We offer alloy can be obtained in different ways: method of fusing materials containing titanium, aluminum, silicon and calcium, method of melting titanium waste with additional introduction of aluminium, silicon and calcium components, metallothermic recovery process by burning a mixture of initial components in an inert gas environment. For carrying out industrial tests have produced a test batch of flux-cored wire with three fillings: alloys I, II and III (table). As the charge materials were used sponge powders titanium grade TG-130, technical grade silicon KR1 and aluminum brand AMD, of which the method of process of combustion were obtained and tested alloys of three different compositions. Experimental melting was carried out on commercially available low-alloy steel, strength class C intended for the manufacture of gas pipes. The composition of steel reglamentirovannyj limit on Titan 0,025±0.005%. Conventional technology for the production of this steel provides smelting 380 ton basic oxygen furnace, circulating pump down, the processing unit, the furnace (AIC) and the pouring of the metal on the key slab caster. Alloying titanium is performed after preliminary deoxidation of steel with aluminum on agriculture by introducing a cored wire filler with ferrotitanium brand PTI 70. The average absorption of titanium in this case amounts to 31.1%, the specific flow rate of 0.92 kg/T. During the experimental heats cored wire with experimental fillers were injected under the same process conditions (the moment you enter, feed rate, time of mixing and blending, etc). For each composition of the new alloy was carried out on two trunks. The table presents the composition of the used fillers, the concentrations of titanium in the finished car, assimilation steel titanium. Thus, the use of a new alloy ensures minimal contamination become harmful impurities due to the high "purity" of the alloying material and allows you to melt steel with narrow concentration limits for titanium by reducing specific consumption ligatures due to the higher titanium content and increased absorption. Consumption of such alloying material is reduced to 1.2 to 2 times.
1. Alloy to alloy steel, titanium, including titanium, silicon, aluminum, carbon, iron, characterized in that it contains components in the following ratio, wt.%:
the ratio of titanium to aluminum is in the range from 3:1 to 15:1. 2. The alloy according to claim 1, characterized in that it contains not more than 0.5% of nitrogen. 3. The alloy according to claim 1, characterized in that it contains not more than 0.5% oxygen. 4. The alloy according to claim 1, characterized in that it contains not more than 0.02% of hydrogen. 5. The alloy according to claim 1, characterized in that it contains components in the following ratio, wt.%:
the ratio of titanium to aluminum is in the range from 6:1 to 8:1. 6. The alloy according to claim 1, characterized in that it additionally contains calcium in an amount of from 0.1 to 15%.
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