43 results about "Ingot" patented technology

A deformable Al-Mn alloy contains Si (0-0.6%), Fe (0-0.7%), Cu (0-0.3%), Mn (0.3-1.6%), Mg (0-1.3%), Ti (0.005-0.15%), RE (0-0.4%), B (0-0.03%), impurities (0-0.7%) and Al (rest). Its preparing process includes such steps as smelting fine-crystal Al ingot, adding others, smelting Al-Mn alloy, and pressure machining.

The present invention relates to a casting-rolling process of magnesium alloy slab and its equipment. Said process includes the following steps: preheating magnesium alloy ingot, smelting said magnesium alloy ingot in smelting furnace with protective gas; transferring the molten magnesium alloy to front tank by means of runner rough, relaining constant temperature in front tank, feeding the molten magnesium alloy into casting-rolling machine by means of lip to make casting and rolling operation, finally using fine rolling machine to make warm-rolling and cold-rolling so as to obtain the finished product plate material with required thickness. Its equipment mainly includes smelting furnace, runner trough, front tank, lip, on-line mixed gas supply device and casting-rolling machine.

The invention relates to a control method of inclusions in a thick steel plate used for high heat input welding, which is characterized by adding a deoxidizing agent during steel liquid pouring, wherein the components and adding order of the deoxidizing agent are as follows: Mn and Si, Al, Ti, Ca and Mg; the Mg content is 0.0005-0.007%, when Mg is added for deoxidizing, the oxygen content in steel liquid needs to be adjusted and precisely controlled through adding Fe2O3 powder to a casting ingot mold, and the adding amount of the Fe2O3 powder is such that the oxygen content in the steel liquid is maintained at 0.001-0.008%; the Al content in steel is lower than 0.006%; the ratio of the inclusions with size smaller than 3mu m in the steel liquid is not lower than 80%, and the surface density of the inclusions is not smaller than 300 inclusions/mm<2>; the main components in the center of the inclusions are MgO or MgO and Ti2O3, and the main component on the external surface of the inclusions is MnS. The inclusions formed by using the method provided by the invention can favorably inhibit the growth of austenite crystal in a welding heat-affected zone and promote the growth of intracrystalline ferrite, thus improving the high heat input welding performance of the thick plate.

The invention relates to a casting method of an aluminum alloy wheel rim. The method comprises the following steps: firstly manufacturing an aluminum alloy ring by using a simple gravity casting mold and an aluminum ingot which is the same with material for manufacturing the aluminum alloy wheel rim, respectively pre-heating the aluminum alloy ring and a metal casting mold, putting the pre-heated aluminum alloy ring on the step of the bottom mold of a low-pressure casting mold, then closing the mold, pressing alloy-containing molten aluminum into the cavity, melting the molten aluminum and the aluminum alloy ring into a whole, wherein the aluminum alloy ring is put into previously; cooling, then demolding to obtain a blank, carrying out heat treatment; turning off the aluminum alloy ring and other excessive blanks; and reclaiming the waste materials, and manufacturing into the aluminum alloy wheel rim product. In the method, the aluminum alloy ring is firstly arranged at the original hot spot of the low-pressure casting mold as one part of the bottom die, achieves the effect equivalent to the side wall of the die in the casting process, is finally molten with the product into a whole, and is turned off by machining, thereby fundamentally eliminating the problems of shrinkage cavity, looseness and difficult demolding as a result of the wall unevenness caused by the hot spot of the cast and ensuring the quality of the product. The method is applicable to the aluminum alloy wheel rim production by any casting method.

The invention discloses a cold burden laying method and a casting starting technology of sizing-nozzle open type continuous casting billets. Crystallizer oil is firstly smeared before casting; a dummy bar where a dummy ingot hook and a cover plate are hooked is conveyed into a crystallizer; a gap is filled with heat-insulating materials; and then a broken steel drop layer, a cocoon-shaped cold burden layer and bowl-shaped cold burdens are sequentially laid. A crystallizer vibration mechanism, secondary cooling water and a draught fan are started. A ladle slide gate is opened, and molten steel is injected into a tundish. When the molten steel surface is 300-400 mm high, casting of the tundish starts; and after flames come up on the crystallizer for 4-5 s, casting starts when the molten steel surface rises to the position 250-350 mm away from an upper opening of the crystallizer. The starting pulling speed is 0.5 m/min; the speed is increased by 0.5 m/min every other 1-2 s; the pulling speed is increased to 2.5-2.8 m/min; the molten steel surface reaches the position 140-160 mm away from the upper opening of the crystallizer; and after the pulling speed is normal, slag fetching operation is performed in time. The cold burden laying method and the casting starting technology avoid the sputtering danger, waste and loss in the molten steel casting process; and the technical problems that because cold burden laying is not reasonable, pulling leakage is caused, and a dummy ingot hook head, the cold burdens and billet heads are not combined properly are solved.

The invention discloses a processing method of a seed crystal with a big drift angle. The method comprises the following steps: selecting a relatively complete horizontal gallium arsenide monocrystal ingot with good electrical parameters, determining (111) crystal face on a head of the monocrystal ingot, determining a drift angle value on the crystal face according to crystallographic direction requirement, diffracting with (331) diffraction angle, cutting out monocrystal blocks according to needed length, bonding the cut monocrystal segments with crystal head upward to a graphite plate with bottom fixedly bonded with metal blocks, orientating the drift angle of the (221) crystal face after the bonding, diffracting with the (331) diffraction angle, rotating the monocrystal blocks for 90 degrees after cutting according to needed height, cutting the needed width when the drift angle of the (110) crystal face is determined zero degree, and then cleaning. The method can help solve difficulty of processing the seed crystal with big drift angle, and has simple, accurate and rapid advantages.

The invention discloses a preparation method for an Nb-Zr alloy/Cu multi-core composite wire. The preparation method includes the following steps that firstly, Nb and Zr are melted to be cast into an Nb-Zr alloy cast ingot; secondly, hot extrusion is conducted, and an Nb-Zr alloy bar is obtained; thirdly, drawing is conducted, and an Nb-Zr alloy wire is obtained; fourthly, pretreatment is conducted; fifthly, primary compounding is conducted, and a pretreated Nb-Zr alloy/Cu primary composite wire is obtained; and sixthly, secondary compounding is conducted, and the Nb-Zr alloy/Cu multi-core composite wire is obtained. By means of the preparation method, due to electric arc melting and with the combination of a bundle drawing technology, preparation of the multi-core composite wire where core wires are evenly distributed and the organization structure is stable is successfully achieved; and the wire prepared through the method has high strength and high conductivity and also has good oxidation resisting capability and excellent corrosion resisting capability.

The invention provides Al-Fe-Ag aluminum alloy. The invention additionally provides a preparation method of the Al-Fe-Ag aluminum alloy. The preparation method of the Al-Fe-Ag aluminum alloy comprises the steps of a) casting aluminum alloy ingots; b) sequentially performing solid solution treatment and aging treatment on the aluminum alloy ingots, and rolling the aluminum alloy ingots after the aging treatment to obtain the aluminum alloy. The invention additionally provides an aluminum alloy cable. By selecting and controlling added elements and by adopting a proper preparation process, the aluminum alloy is enabled to have better comprehensive performance.

The invention belongs to the aluminum alloy manufacturing technology field and relates to a manufacturing method of an aluminum alloy three-layer composite material for brazing. The method mainly comprises the steps of component proportioning of a brazing layer, fusion casting, saw cutting, surface milling, hot rolling, proportioning of a base body layer, fusion casting, saw cutting, surface milling, surface treatment of the two, seaming assembling, heating, hot rough rolling compounding, hot finish rolling, cold rolling, withdrawal and straightening cleaning, finished product annealing, slitting and packaging. Through a component optimization design, strength of a composite material and anti-sagging performance after high-temperature brazing can be improved, meanwhile, balance between mechanical performance and corrosion performance is guaranteed, and a brazing requirement of controllable gas shielded welding can be well satisfied. A two-stage heating mode of homogenizing heat treatment and hot rolling heating is performed at the same time after a brazing material and a matrix cast ingot are combined so that production efficiency can be greatly improved, energy consumption is reduced and product performance requirements are satisfied.

Disclosed is a simple method for manufacturing pure copper plates which does not involve cold forging or cold pressing after hot forging or hot pressing, or heat processing thereafter; also disclosed is the finely uniform pure copper plate which is obtained by said method, has low residual stress and excellent processability, and is especially suitable as a copper sputtering target material. Pure copper ingots of purity no less than 99.96 wt% are heated to 550-800 DEG C, and after hot pressing with a total press rates of 85% or more and a temperature at press completion of 500-700 DEG C, are quenched at a cooling rate of 200-1000 DEG C/min until the temperature reaches 200 DEG C or less from the aforementioned temperature at press completion.

The invention discloses a high-purity titanium ingot purification method. The method comprises the steps of preparation of materials, loading of the materials into a furnace and electron beam melting.An electron beam furnace is adopted for melting, the temperature is raised to start electron beam smelting when the vacuum degree of a hearth of the electron beam melting furnace is maintain to be higher than or equal to 2.0*10<-2> pa, the melting temperature is controlled to be higher than or equal to 2350 DEG C, the melting speed is controlled to be higher than or equal to 25 kg/h, a titanium strip is fully melted, and a titanium ingot formed after electron beam melting is cooled in the hearth and then discharged out from the furnace. The content of iron, silicon, carbon and other impurityelements is effectively reduced, correspondingly the high-purity titanium ingot is obtained, and high-purity metallic titanium has no pores and no impurities.

The invention relates to a preparation method of aluminum alloy rod materials, and aims to solve the problems that in the prior art, structural defects including coarse grain rings and the like are easy to generate, so that physical properties of the material are reduced, normal use of the material is influenced, and using risks are caused. The preparation method comprises the following steps of casting ingots, heating ingots, performing an extruding technology, performing product quenching according to quenching condition requirements, and performing stretching and flattening. According to the preparation method disclosed by the invention, the extruding technology adopts a dual-hole mold for backward extruding, so that the extrusion ratio is reduced; in the extrusion process, the deformation of aluminium ingots is reduced, the formation of coarse grains is restrained, and besides, the production efficiency is improved; the tensile strength of the aluminum alloy rod materials preparedby the invention is greater than or equal to 460MPa; the yield strength is greater than or equal to 400MPa; the elongation percentage is greater than or equal to 10%; and the preparation method is applied to the field of forging of aluminum alloys.

The invention relates to a zinc alloy for steel component galvanizing, the ingot shape and the method. The comprised component and weight proportion are as follows: 0.008%-0.012%(wt)Al,0.02%-0.08%(wt)Bi, 0.006%-0.01%(wt)RE, the rest is zinc and unavoidable impurities. The ingot shape is'T'cuboid with two symmetrical ear-warps, the bottom of cuboid is plane, ear-warps are equipped with hoisting holes, and the four sides are inclined plane which is narrow-end-up shape. It is characterized by direct fusion of said alloy to zinc bath, simple utilization, stable and homogeneous aluminium, bismuth and rare earth content in zinc alloy, improved coating brightness and zinc flowability, decreased coating thickness, and saved zinc plating cost. The proper zinc alloy ingot shape and weight meets the demand of zinc addition for large-capacity galvanizing equipment, and it is convenient for hoisting and cross transportation, specific surface area is small, which is suitable for multi-layer stacking storage.

The invention belongs to the field of titanium alloy materials, and discloses a titanium alloy for a 3D printing ship. The titanium alloy comprises the following components: 4.0-8.0% of Al, 0.3-2.0% of Mo, 1.0-4.0% of Nb, 0.5-3.0% of Zr, 0.01-0.03% of Y, 0.03-0.12% of O, and the balance of Ti. A preparation method of the titanium alloy comprises the following steps that the materials are preparedaccording to the components of the titanium alloy; the raw materials are smelted and cast into ingots; the cast ingots are machined into rods after cogging and forging; the rods are machined into powder; the powder is screened to obtain titanium alloy powder for the 3D printing ship; and the titanium alloy powder for the 3D printing ship is used as a raw material for preparing a titanium alloy component by a 3D printing technology. The titanium alloy for the 3D printing ship is excellent in strength and toughness matching, is excellent in 3D printing laser forming performance, can be preparedinto a complex titanium alloy component through 3D printing, and is excellent in seawater corrosion resistance and welding performance.

The present application provides a draft tube of crystal growing furnace and the crystal growing furnace. The draft tube comprises an inner tube, an outer tube and a thermal insulating material sandwiched between the inner tube and the outer tube, wherein the inner tube has a thermal resistance lower than that of the outer tube. Accordingly, the outer tube having the higher thermal resistance reduces the heat transfer from the outer tube to the inner tube, thereby the temperature of the inner tube can be reduced, the heat radiation from the ingot surface to the inner tube can be enhanced, and the vertical temperature gradient of the ingot can be increased. At the same time, the temperature of the outer tube increases to reduce the condensation of silica vapor (SiOx) evaporated from the silicon melt surface, thereby impurity formation and dislocation defect caused by the SiOx fallen into the silicon melt can be prevented.

The invention provides a short-process preparation method of a Ti-Al-V-Fe alloy seamless tube. The method is characterized by comprising the following steps: 1) preparing materials; 2) mixing the materials and briquetting; 3) putting the materials into an electron beam gun EB furnace; 4) performing vacuum melting to obtain a Ti-Al-V-Fe alloy round ingot; 5) drilling centering holes in two ends of the ingot, and feeding the ingot into a two-roller skew rolling mill for skew rolling and perforating; 6), feeding the ingot to a three-roller continuous rolling machine for continuous rolling; 7) carrying out heating and sizing to obtain a seamless tube; 8) carrying out annealing treatment to obtain the Ti-Al-V-Fe alloy seamless tube. The Ti-Al-V-Fe alloy seamless tube has a uniform metallographic structure and are few in high-density and low-density inclusions and high in purity, the technological process is short, the mechanical property is superior to that of the prior art, the comprehensive yield is increased to 85% or above, the production cost is reduced by 20%-30%, and obvious market application prospects are achieved.

The invention discloses a method for preparing coarse granularity chromium carbide powder capable of simplifying the process, saving the energy consumption, improving the rate of qualified products ina milling process and well meeting requirements of preparation of wear-resistant, corrosion-resistant, high-temperature oxidation resistant novel materials in industries such as hard-face materials,flux-cored wires, high temperature alloys and the like. The method comprises the following steps: burdening chromium sesquioxide powder and carbon, and adding an adhesive to be uniformly mixed; molding with a press after uniform mixing; placing the molded material block in a high-temperature vacuum induction heating furnace graphite crucible, vacuumizing, performing power-on heating and raising the temperature, and maintaining the vacuum degree to be within 200-400Pa; carrying out a vacuum carbonation reaction between the chromium sesquioxide powder and carbon to produce chromium carbide, andcontrolling the carbonation reaction temperature to be 1350-1550 DEG C, wherein the carbonation reaction time is 8-15 hours; enabling the vacuum degree to be less than 100Pa, filling the furnace withargon after the carbonation reaction is completed, controlling the pressure in the furnace to be 40-80kPa, and increasing the heating power to melt the chromium carbide sintered body so as to obtain achromium carbide ingot; crushing the chromium carbide ingot into particles with the granularity of less than 10mm by using a mechanical method, milling by an impact crusher, and passing through a 60-mesh sieve, thereby obtaining the coarse granularity chromium carbide powder.

The invention discloses a Zr-Fe alloy for tritium storage and a preparation method thereof. The chemical formula of the alloy is Zr2-xTixFe1-y-zNiyCoz, wherein x, y and z represent the atomic ratios of Ti, Ni and Co replacing Zr and Fe correspondingly, x ranges from 0.01 to 0.05, y ranges from 0.01 to 0.05 and z ranges from 0.01 to 0.03. The preparation method of the Zr-Fe alloy comprises the following steps that (1) preparation is carried out according to the chemical formula, a vacuum non-consumable electric-arc furnace is adopted for carrying out turnover smelting 3-5 times, and a cast ingot is prepared; and (2) the smelted cast ingot is heated again into a smelted state, magnetic stirring is carried out for 2-5 min. The alloy is hydrogen storage alloy low in balance pressure, and has the beneficial effects that the room temperature balance pressure level is lower than 1 Pa, the hydrogen (tritium) adsorption and desorption rate is high, the cycle life is long, hydrogen induced disproportionation is resisted, and the hydrogen (tritium) storage capacity is large. In addition, the preparation method of the Zr-Fe alloy is easy to operate, easy to achieve and high in efficiency, andcompared with a common ZrCo alloy and ZrNi alloy, the cost is lower.

The invention provides a high-strength antibacterial titanium alloy plate and a preparation method thereof. The high-strength antibacterial titanium alloy plate comprises the following chemical components in percentage by weight of 5.5-6.5% of Al, 3.5 to 4.5% of V, 3 to 9% of Cu, and the balance Ti. The preparation method of the titanium alloy plate comprises the following steps of smelting in a vacuum consumable electrode furnace to obtain a raw material ingot; performing cogging and forging at the temperature of 1000 DEG C or above after the ingot is ground, and performing precise forging and machining to form a plate blank; carrying out heat preservation on the plate blank for a period of time at the temperature of 1000 DEG C to 1300 DEG C, then, rapidly cooling the plate blank, and enabling a plate to obtain an ultrafine nanometer lath structure; after quenching, performing rough rolling on the plate blank at the temperature of 800-900 DEG C, enabling the hot rolling accumulated deformation amount to be larger than or equal to 90%, and obtaining an ultrafine nanometer lath structure plate; and after rough rolling, performing finish rolling on the plate at the temperature of 700-780 DEG C to obtain the plate with the required size. The structure of the plate processed by the method is equiaxed grains, the size of the plate is less than 400nm, and the grains are not coarsenedand grow up within 3h of aging at 650 DEG C or below.

A drop feeder (1) for feeding molten metal into an ingot mould (15) comprises a distributor (3) having a substantially prismatic shape, with one of the faces open, in which the inside of the distributor comprises three tanks (4, 5, 6), separated by walls (7, 8) functioning as weir for the molten melt poured into the intermediate tank (5). There are provided slots (10) arranged on the faces of the distributor (3) for emptying of the molten metal from the distributor into the ingot mould or into a second distributor.

The invention discloses a preparation method of a niobium-zirconium 10 alloy tube. The method comprises the following steps: making niobium powder and zirconium sponge into a niobium ingot and a zirconium strip respectively, and welding the niobium ingot and zirconium strip together by use of a niobium wire in a vacuum furnace; performing smelting purification and hydrogenation treatment to obtain niobium-zirconium alloy powder; and performing dehydrogenation treatment and isostatic pressing and sintering to obtain the niobium-zirconium 10 alloy tube. According to the preparation method of a niobium-zirconium 10 alloy tube disclosed by the invention, by making the niobium ingot and zirconium strip into alloy powder and then performing isostatic pressing to obtain the tube, the niobium and zirconium can be sufficiently alloyed without segregation; and moreover, the niobium-zirconium crystal grain has good structural uniformity and is resistant to corrosion and wear, and the service life is prolonged.