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18129 results about "Ingot" patented technology

An ingot is a piece of relatively pure material, usually metal, that is cast into a shape suitable for further processing. In steelmaking, it is the first step among semi-finished casting products. Ingots usually require a second procedure of shaping, such as cold/hot working, cutting, or milling to produce a useful final product. Non-metallic and semiconductor materials prepared in bulk form may also be referred to as ingots, particularly when cast by mold based methods. Precious metal ingots can be used as currency (with or without being processed into other shapes), or as a currency reserve, as with gold bars.

Method for casting composite ingot

A method and apparatus are described for the casting of a composite metal ingot comprising at least two separately formed layers of one or more alloys. An open ended annular mould has a feed end and an exit end and divider wall for dividing the feed end into at least two separate feed chambers, where each feed chamber is adjacent at least one other feed chamber. For each pair of adjacent feed chambers a first alloy stream is fed through one of the pair of feed chambers into the mould and a second alloy stream is fed through another of the feed chambers. A self-supporting surface is generated on the surface of the first alloy stream and the second alloy stream is contacted with the first stream such that the upper surface of the second alloy stream is maintained at a position such that it first contacts the self-supporting surface where the self-supporting surface temperature is between the liquidus and solidus temperatures of the first alloy or it first contacts the self-supporting surface where the self-supporting surface temperature is below the solidus temperatures of the first alloy but the interface between the two alloys is then reheated to between the liquidus and solidus temperatures, whereby the two alloy streams are joined as two layers. The joined alloy layers are then cooled to form a composite ingot. This composite ingot has a substantially continuous metallurgical bond between alloy layers with dispersed particles of one or more intermetallic compositions of the first alloy in a region of the second alloy adjacent the interface.

AlCoCrFeNiTix high-entropy alloy material and method for preparing same

The invention relates to a high-entropy alloy material and a method for preparing the same. The component of the high-entropy alloy material is AlCoCrFeNiTix, wherein x represents a molar ratio, and the value range is between 0.1-0.4. The method for preparing the material comprises: preparing raw materials, adopting the alloy smelting raw materials including Al, Co, Cr, Fe, Ni and Ti, and accurately weighing and proportioning according to the molar ratio; then, purifying oxide on a metal surface; putting the prepared raw materials into a tank in a water-cooling copper-formed mold smelting pool, vacuumizing, filling argon, controlling smelting current to be at about 250 ampere and smelting time for 30-60 seconds, turning an alloy block after alloys are fully mixed, putting an alloy ingot into a tank of a water-cooling copper-formed mold, regulating the smelting current, opening a suction casting air suction valve after the alloys are uniformly smelted, utilizing the negative pressure in a pump for suction casting, and taking out the alloy ingot after an alloy mould is cooled. Compared with the conventional crystalline state alloy, the high-entropy alloy material has relative high thermal stability, hardness, yield strength, breaking tenacity, plastic deformation and work hardening capacity.

7000 series aluminum alloy material and preparation method thereof

The invention relates to a 7000 series aluminum alloy material and a preparation method thereof. The aluminum alloy material has alloy components of, by weight: 7.6-11.0% of Zn, 1.2-3.0% of Mg, 1.3-2.6% of Cu, 0.04-0.30% of Zr, 0.10-0.60% of Cr, no more than 0.08% of Si, no more than 0.10% of Fe, no more than 0.10% of Ti, no more than 0.15% of total other impurities (wherein the content of single other impurity is no more than 0.05%), and balance of Al. The alloy elements Zr and Cr can be added optionally or simultaneously. The materials are prepared according to the alloy composition; the raw materials are molten; in-furnace refining and standing are carried out; and the material is cast into alloy ingots with required specifications. The alloy ingots are subjected to a preferable graded uniformization process, and is forged or extruded, such that the alloy ingots are molded; the molded materials are subjected to graded solid solution treatment, and are quenched; and artificial forced aging is carried out, such that the material can be processed into parts. The microstructures of the material are uniform, and the property of the material is stable. The ultimate tensile strength of the material can be more than 750MPa. The extensibility of the material is higher than 10%. The T-L direction KIc of the material reaches 28MPam1 / 2.

High-entropy alloy with dispersion nano-sized precipitate strengthening effect and preparing method thereof

The invention discloses high-entropy alloy with the dispersion nano-sized precipitate strengthening effect and a preparing method thereof. The method comprises the steps of removing oxidized skin of a metal material, and then conducting weighing and burdening accurately according to a ratio; conducing smelting in an electric-arc furnace in an argon shield atmosphere of titanium absorbed oxygen to obtain an initial high-entropy alloy ingot, and conducting cold rolling, wherein rolling reduction is 20-50%; placing the ingot in a heat treatment furnace with a temperature ranging from 900 DEG C to 1000 DEG C for heat preservation for 0.5-2 hours, and conducting quenching; placing the ingot in a heat treatment furnace with a temperature ranging from 700 DEG C to 800 DEG C for heat preservation for 2-18 hours, and conducting quenching. By means of precipitation strength, on the premise that high plasticity is kept, yield strength and tensile strength are improved greatly. The room-temperature tensile strength of (FeCoNiCr)94Ti2Al4 in the final state reaches 1094 MPa, plastic elongation is 35%, work hardening effect is remarkable, comprehensive room-temperature mechanical property is prominent, high-temperature tensile strength can reach 400 MPa at the temperature of 800 DEG C and strain rate of 10<-3>, steady creep rate is smaller than or equal to 10<-8> under the stress of 100 MPa and at the temperature of 750 DEG C, and high-temperature tensile strength and creep mechanical property are excellent.

High-performance marine mooring chain steel and manufacturing method thereof

The invention relates to high-performance marine mooring chain steel and a manufacturing method thereof. The method comprises the following steps: a. tapping compositions comprise the following by weight percentage: C: 0.16 to 0.27, Mn: 0.40 to 1.45, Si: 0.15 to 0.50, Cr: 1.25 to 2.50, Ni: larger than 0 and less than 1.20, Mo: 0.20 to 0.60, Al: 0.01 to 0.06, N: 0.004 to 0.015, S: not larger than 0.005, P: not larger than 0.015, Cu: larger than 0 and less than 0.50, and the balance of Fe; b. a steel ingot or a continuous casting billet is casted after the steps of primary smelting in an electric stove or a converter, external refining and vacuum degassing; c. the charging temperature of a heating oven is not larger than 900 DEG C, the heating rate is not larger than 150 DEG C/h; when being raised to 1100 to 1300 DEG C, the temperature is kept for more than 40 minutes, cogging bloom or rolling by a finisher is carried out, and the finishing temperature is not larger than 1050 DEG C; and d. after heated at the temperature of 1000 to 1250 DEG C, the cogged ingot is hot-rolled or forged into round steel, the finishing temperature is not larger than 1050 DEG C, and after rolling, the steel is air-cooled, slow cooled or softening heat-treated at the temperature of not less than 600 DEG C. The performance of finished products achieves or exceeds the requirement of level 4.5 and level 5 of mooring chain steel.

Continuous casting technique for aluminum alloy thin belt blank

InactiveCN101269406AImprove organizationComprehensive mechanical properties of high thin stripIngotMaterials science
The invention discloses a continuous casting process of an aluminum thin billet, which is characterized in that the following steps are included: aluminum alloy ingots are preheated and are melted in a melting furnace in the role of a flux; before casting, a side closure system is preheated to 400-450 DEG C, when the temperature of a melting body ranges from 650 DEG C to 680 DEG C, the aluminum alloy ingots are arranged into a tundish for 15 to 30 minutes in the role of the flux, then through a flux distributing device, the aluminum alloy ingots flow into an equant vertical twin-roll thin strip billet continuous caster, with a left forging seam gap being 0 mm and maintaining the height of a melting pool between 90 mm and 340 mm, the casting is carried out in a sinking way; when in casting, the casting speed of the casting machine ranges from 20 to 120m / min, the thin strip blank is sent into a pinch roll after leaving a casting roller, and the forged aluminum alloy thin strip has a thickness between 1.0 mm and 3.5 mm. The continuous casting process can directly make aluminum alloy thin strip blank from the liquid aluminum alloy, the forged thin strip blank has good quality on the surface, and the internal organizational structure is uniform, thereby being conducive to succeeding rolling processes. The continuous casting process for an aluminum thin blank has short process and low cost.

Method for recovering polysilicon ingots, carborundum powder and polyethylene glycol from cutting waste mortar

The invention discloses a method for recovering polysilicon ingots, carborundum powder and polyethylene glycol from cutting waste mortar. The recovering method comprises the following steps shown as an attached diagram, wherein the high temperature purification comprises the following steps of: mixing the prepared silicon micro powder with a fluxing agent according to the weight ratio of 1: 0.5-5 into lumps, carrying out high temperature treatment in a high temperature vacuum furnace with the treatment temperature range of 1450-1800 DEG C and the treatment time range of 1-10h; and then carrying out directional solidification on melting-state high purity silicon subjected to the high temperature treatment to obtain the polysilicon ingots; wherein the fluxing agent is selected from one or any mixture of silica, alumina, calcium oxide, magnesium oxide, potassium oxide, sodium oxide, calcium fluoride, magnesium fluoride, sodium fluoride, sodium chloride, potassium chloride and calcium chloride. The invention has the advantages that: the yields of carborundum and polyethylene glycol are high and can reach more than 70-80 percent; and the recovered polysilicon ingots reach the purity of 6-7N and completely satisfy of the requirement for preparing silicon slices of silicon solar cell.

Method for producing wind-electricity principal axis with gathering stock full fibre upset forging

The invention relates to a method for producing a wind-power mainshaft by local continuous upsetting and all-fibre upset forging. The method comprises the following: step one, the heating of steel ingot; step two, forging; step three, first heat processing; step four, rough machining and ultrasonic inspection; step five, quenching and tempering and heat processing; step six, fine machining, wherein, during the step two, the forging comprises that: (1) a first fire, during which, a steel ingot is subject to upset forging at a forging temperature of between 1250 and 900 DEG C; firstly, the bottom of the steel ingot is sawed off, and the steel ingot is subject to capping and upset forging; (2) a second fire, during which, the steel ingot is stretched towards various directions, marked and subject to intermediate billet cogging; after a pole part is molded, scrap on a T end is chopped and removed; after the forging is finished, the steel ingot returns to a heating furnace for being reheated; (3) a third fire, during which, the steel ingot is subject to local continuous upsetting and all-fibre upset forging; (4) a fourth fire, during which, the steel ingot is subject to rolling and leveling; the pole part is stretched; the disc edge of a hub end on the head part of an intermediate billet material after the local continuous upsetting and all-fibre upset forging is subject to rolling operation; after the rolling, the intermediate billet material is inserted into a leaking disc component again; the end face of the disc is pressed and leveled; after the shaping of the disc end is completed, a manipulator clamps the disc and stretches the pole part of the intermediate billet material to a dimension of a forgeable piece; thus, the mainshaft forging is completed. The method can improve the fatigue resisting strength of a wind-power mainshaft forging piece.

Aluminium-titanium-horon rare earth fining agent, and its preparing method

The invention relates to the thinning reagent having the aluminum, the boron and the lanthanide of the aluminum and the aluminum alloy, it belongs to the domain of the applied technique of the aluminum alloy. The said thinning reagent factors include the aluminum, the boron, the titanium and the lanthanide (mainly includes the lanthanum and the Ce), the said producing process is showed as follows: the pure aluminum ingot, the alloy ingot having the aluminum and the lanthanide, the potassium hexafluorotitanate and the potassium borofluoride are prepared according to the thinning reagent element confecting in advance; the aluminum ingot and the aluminum lanthanide ingot are heated and melted in the intermediate frequency inducing stove, then several material are added; the fusing body acts with the high temperature; the temperature keeps even and the dregs is removed after the action; then the fusing body is irrigated to the ingot or connecting cast and rolled to the line material. According to the said process condition, the high pure aluminum can be removed the pole crystal, the size of the crystal grain of the industry pure aluminum and all series of distortional aluminum alloy can be divided to under the 100um, the casting form crystal grain core can be reduced to under 2um firmly to all sorts of the aluminum used in the foil material; the size of the crystal grain of the alloy of the aluminum and the silicon can be reduced to under 150-200um. At the same time, the intension, the molding ability and the tenacity of the industry pure aluminum and all sorts of the aluminum alloy can be improved highly.

Preparation method of ultra-fine grain high-entropy alloy

The invention belongs to the technical field of metal materials and machining and relates to a preparation method of an ultra-fine grain high-entropy alloy. Firstly, smelting is conducted, an FeCoCrNiMn series high-entropy alloy is compounded to be an intermediate alloy composed of pure metal with the purity being higher than 99.5% or alloy elements, a vacuum furnace is adopted for smelting, and the furnace casting temperature is 1550-1600 DEG C; then after cast ingots are subjected to homogenization heat treatment at the temperature of 1000-1350 DEG C, strong deformation asynchronous and synchronous mixed cold rolling treatment is conducted, continuous rolling is conducted through single-pass large percent reduction, the total rolling quantity is no smaller than 85%, and alloy structure nanocrystallization is achieved; and the rolled alloy is subjected to annealing treatment under the temperature of 450-800 DEG C, and the high-entropy alloy of an ultra-fine grain structure is obtained. Compared with the prior art, the preparation method is simple in technique, easy to achieve on a plate rolling production line, high in production efficiency and low in cost; and the size of the prepared ultra-fine grain high-entropy alloy is large, the comprehensive mechanical performance is excellent, and the preparation method can be applied to the fields of engineering machinery, aeronauticsand astronautics, military industry, electronics, instruments and the like.
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