313 results about "Vacuum induction melting" patented technology

The invention discloses a pickling-free cold heading Kovar alloy wire production process which comprises the following steps: S1, raw material preparation: preparing the following raw materials in percentage by mass: 41.5% of Ni, 0.5% of Co, less than or equal to 0.03% of C, less than or equal to 0.05% of Mn, less than or equal to 0.05% of Si, less than or equal to 0.02% of P, less than or equal to 0.02% of S and the balance of Fe; mixing the materials, and carrying out vacuum induction melting and electroslag remelting to prepare an alloy ingot; the alloy cast ingot is subjected to hot rolling treatment to form a hot-rolled wire rod with the diameter being 12.0-16.0 mm; s2, peeling treatment is conducted, specifically, surface layer defects of the hot-rolled wire rod in the step S1 are removed through a peeling machine; s3, dry-type drawing treatment is conducted, specifically, the hot-rolled wire rod treated in the step S2 is subjected to dry-type drawing through a dry-type drawing die to form an alloy wire; s4, intermediate annealing treatment is conducted, specifically, the alloy wire in the step S3 is placed in an annealing furnace, sufficient hydrogen is input into the annealing furnace, intermediate annealing is conducted under the hydrogen protection atmosphere, the annealing temperature is 950-1100 DEG C, and the annealing walking speed is 3-5 m / min; the surface quality and the size consistency of the wire can be improved, meanwhile, the defects of environmental pollution, hydrogen embrittlement and the like are reduced, and the use requirements of high-end precise cold heading parts are met.

The invention belongs to the technical field of vacuum centrifugal casting and vacuum induction melting, and particularly relates to a complex thin-wall casting vacuum induction remelting pouring temperature gradient control device and method, and the device comprises a calculation system, a temperature measurement mechanism, a rapid induction remelting mechanism and a bottom pouring crucible; the calculation system is used for achieving simulation calculation of rapid induction remelting and bottom pouring of the alloy ingot, and the temperature measuring mechanism outputting target remelting characteristic parameters is used for measuring temperature changes and temperature gradient distribution of the top, the middle and the bottom of the alloy ingot in the remelting process in real time. The rapid induction remelting mechanism is used for melting the alloy ingots and achieving the melting sequence of the alloy ingots from top to bottom and from outside to inside. By means of the high-temperature alloy remelting device, the problem that in the high-temperature alloy remelting process, due to the fact that the temperature gradient is disordered, alloy is completely melted or part of alloy liquid flows out from the bottom firstly is effectively solved, and casting defects are reduced.

The invention discloses a smelting method of a large-size Fe-based high-temperature alloy for a gas turbine. The smelting method comprises the following two steps: casting a metal raw material into a 710mm electrode bar through a vacuum induction furnace, and then feeding the electrode bar into a consumable electrode vacuum furnace for remelting to produce a 810mm steel ingot. According to the method, the vacuum induction melting and vacuum consumable remelting (VIM and VAR) combined process is adopted for smelting, so that the burning loss of the Ti element can be effectively controlled to ensure that the content of the Ti element reaches the standard, excessive generation of Ti-series carbonitride can be avoided, and the negative influence on the purity of the molten steel is fundamentally avoided.

The present application relates to high-temperature alloy smelting technical field, specifically relates to a kind of high-aluminum titanium cast nickel-based high-temperature alloy purification smelting method.The pure smelting method, step one, low calcium nickel alloy preparation;Step two, pure smelting: batching and furnace charging, melting period, refining period, alloying period, calcium treatment purification period and casting period;Pure smelting process is carried out in vacuum induction melting furnace, 2 / 3 low calcium nickel alloy is directly loaded into magnesium oxide crucible when furnace charging, and the remaining 1 / 3 low calcium nickel alloy is added in calcium treatment purification period.The present application prepares a kind of component accurately controllable "low calcium nickel alloy" as master alloy by pre-preparation, is added in key smelting stage, solves the problem of calcium element direct addition, realizes the deep deoxidation denitrogenation desulfurization of alloy melt, significantly reduces the oxygen, nitrogen, sulfur impurity content in alloy, to improve the purity and comprehensive mechanical properties of alloy.

The invention discloses a method for reducing impurity element sulfur in cast high-temperature alloy return scraps, and belongs to the technical field of metal material smelting. The method comprises the following steps: carrying out vacuum induction melting on pretreated cast high-temperature alloy return scraps of the same mark to obtain a return scrap alloy induction ingot; surface oxide skin of the obtained return scrap alloy induction ingot is removed, a primary shrinkage cavity in the upper end is cut off, then the return scrap alloy induction ingot and an auxiliary electrode are coaxially welded, and a consumable electrode is obtained; and after the consumable electrode is baked, electroslag remelting is conducted under the protective atmosphere, and an electroslag ingot is obtained. On the basis of vacuum induction melting, the protective atmosphere electroslag remelting technology is further adopted for conducting deep purification melting treatment on the return scrap alloy ingot, the content of the impurity element S in the return scrap alloy ingot can be reduced to 0.5 ppm or below, and the content of the impurity element S in the return scrap alloy ingot reaches the level lower than the content of the element S in a new material; and the high-temperature oxidation resistance and corrosion resistance of the alloy can be obviously improved, and the fatigue, durability and other mechanical properties of the alloy are improved.

A vacuum induction melting (VIM) furnace and method of using. A VIM is configured for use with metal-containing carbon powders. In operation, the metal-containing carbon powders are formed into a pellet so as to minimize or eliminate ejection of material during introduction of the pellet into the VIM processor. The VIM processor may be substituted or used in combination with a vacuum arc melt processing apparatus, an electron beam melt furnace, an ion plating furnace, a plasma flame source, a smelter, a traditional metal-metal melt furnace, or any equivalent. Pelletizing can be accomplished through use of a press or through application of any pelletizing technique and / or use of any apparatus that is able to generate pellets that have sufficient mass to avoid ejection from a VIM processor.

The invention discloses a preparation device of a titanium hydrogen storage alloy for solid hydrogen storage, which comprises a vacuum induction melting system and an ultrasonic generation system, the vacuum induction melting system comprises a vacuum chamber, a melting mechanism and a heatable mold which are arranged in the vacuum chamber, and a vacuum pump communicated with the vacuum chamber; the ultrasonic generation system comprises an ultrasonic generator, an amplitude-change pole and an ultrasonic probe which are connected in sequence, one end of the ultrasonic probe extends into the vacuum chamber, and a mobile positioning system for controlling the position of the ultrasonic probe is arranged on the vacuum induction melting system; the invention further discloses a preparation method of the titanium hydrogen storage alloy for solid hydrogen storage. According to the device, the ultrasonic generation system is arranged, ultrasonic waves are applied in the raw material smelting process, segregation of the Ti element is effectively restrained, meanwhile, dendritic crystal arms are broken in the alloy solidification process, more nucleation sites are formed to refine grains, and the device is suitable for preparing the titanium hydrogen storage alloy for solid hydrogen storage.

The application belongs to the field of high-entropy alloys, and particularly relates to a preparation method of an ultra-high strength and plasticity product Fe50Mn30Co10Cr10 alloy. Firstly, a cast slab is prepared through vacuum induction melting, then the cast slab is subjected to multi-pass hot rolling with a reduction ratio of 70% to 75%, and after pickling, the cast slab is subjected to multi-pass warm rolling with a reduction ratio of 80%, and finally, high-temperature short-time annealing is carried out at 1050 to 1150 DEG C to obtain a final annealing plate. In the application, the phase transformation behavior in the alloy deformation process is inhibited by controlling the hot rolling and warm rolling temperatures, and the rolling plasticity of the material is improved. Meanwhile, by optimizing the annealing process, the grains are refined as much as possible, and a certain dislocation density is retained, and the strength and plasticity of the alloy are improved through the comprehensive action of multiple strengthening mechanisms. The prepared Fe50Mn30Co10Cr10 alloy has a tensile strength of 1050 to 1280 MPa, an elongation of 35% to 58%, and a strength and plasticity product of 40 to 73 GPa.

The application belongs to the technical field of metal material forming, and relates to a high-strength plastic titanium-based composite material ring-shaped piece and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing titanium alloy powder and reinforcing phase powder, preparing a ring-shaped blank according to a process flow of "melting -> plasma rotating electrode atomization -> degassing and sealing welding -> hot isostatic pressing -> ring rolling", and finally performing annealing treatment on the ring-shaped blank to obtain a target ring-shaped piece. The application replaces the traditional laboratory small-batch ball milling method for preparing titanium-based composite material powder by using "large-batch mixing + vacuum induction melting rod preparation + plasma rotating electrode atomization method", so that the reinforcing phase can be introduced into the titanium matrix crystal and uniformly distributed, and the application is suitable for industrialized mass production requirements. The titanium-based composite material ring-shaped piece is prepared through the "powder metallurgy blank preparation + hot deformation" process, the size accuracy of powder metallurgy forming and the high efficiency of special-shaped ring rolling are utilized to achieve the effects of reducing the processing period, improving the material utilization rate and the forming rate.

The invention provides a corrosion-resistant iron-based amorphous material suitable for ultrahigh-speed laser cladding and a preparation method of the corrosion-resistant iron-based amorphous material. The corrosion-resistant iron-based amorphous material is characterized in that an iron-based amorphous coating comprises the following components in percentage by weight: 27-29 wt% of Cr, 2-3 wt% of Co, 1-3 wt% of Nb, 3-5 wt% of Mo, 5-8 wt% of Ce, 3.6-3.8 wt% of B, 4.3-4.5 wt% of Si, 0.7-0.9 wt% of C and the balance of Fe. Amorphous alloy powder is prepared by combining vacuum induction melting with a gas atomization powder preparation technology, a coating is prepared on the surface of a base body by adopting an ultra-high-speed laser cladding technology, the coating has high amorphous content and excellent corrosion resistance, and meanwhile, low porosity (llt) is achieved through the ultra-high-speed laser cladding technology; the coating has the advantages of high hardness (greater than or equal to 800HV) and strong bonding strength (greater than or equal to 70MPa), prolongs the service life of maritime work equipment in a marine environment, is suitable for industrial popularization, is suitable for surface protection of marine equipment, chemical equipment and other severe environments, and has the advantages of efficient process, environmental protection, low cost and strong corrosion resistance.

The invention discloses a preparation method of a novel low-alloy steel solid welding wire. The preparation method comprises the following steps of S1, raw material smelting, S2, a hot working stage, S3, a cold working stage, S4, surface treatment and S5, quality detection. During raw material selection, C-Mn-Si is adopted as a basic alloy, the content of C is 0.06-0.12%, the content of Mn is 1.2-1.6%, then a Ti-B microalloy is added, the hardenability is improved, the O / N content is limited at the same time, then a two-stage refining process combining vacuum induction melting and electroslag remelting is adopted, the melting temperature, time and refining slag system components are regulated and controlled, and the hardness of the alloy is improved. The method comprises the following steps: preparing a copper plating solution through equipment, deeply removing harmful impurities such as S and P, promoting floating and size refinement of inclusions by applying an electromagnetic stirring technology, remarkably improving the purity of a metal matrix, thereby improving the purity of raw material smelting, proportioning the copper plating solution through the equipment, setting the parameters of the copper plating equipment to be 10-15A / dm in current density and 2-3mu m in plating thickness, and carrying out a copper plating process on a welding wire.

The invention discloses a V-Ti-Ni shape memory alloy with high elasticity modulus and high hardness and a preparation method of the V-Ti-Ni shape memory alloy. The preparation method comprises the steps of raw material proportioning, V-Ni pre-alloy smelting, vacuum induction smelting and argon protection pouring, multi-pass hot forging and hot rolling and fine cold drawing, and particularly, 7-9 at% of vanadium element is introduced, so that the diameter phi of the prepared V-Ti-Ni shape memory alloy wire is 0.10-0.50 mm. According to the V-Ti-Ni shape memory alloy prepared through the method, the elasticity modulus at the room temperature reaches 100-110 GPa, the microhardness is 320-360 HV, the phase transition temperature regulation and control range of the NiTi-based shape memory alloy is widened, and the structural rigidity, abrasive resistance, plasticity and cycle stability of the V-Ti-Ni shape memory alloy material are remarkably improved. The V-Ti-Ni shape memory alloy prepared through the method is mature in process route, can be produced in batches and is suitable for precise elastic components in medical instruments, micro electro mechanical systems, thermal actuators and spaceflight structures.

The application belongs to the technical field of metal materials, and particularly relates to a kind of multi-element micro-alloyed Al-Zn series magnesium alloy for semi-solid injection and a preparation method thereof, which comprises the following steps: raw materials and pretreatment; vacuum induction melting and purification are carried out on the raw materials to obtain a melt containing multi-element micro-alloyed Al-Zn series; the melt is rapidly solidified and powdered to obtain petal-shaped magnesium alloy granules; the magnesium alloy granules are subjected to semi-solid injection molding to obtain a magnesium alloy molded part; the magnesium alloy molded part is subjected to special gradient heat treatment to obtain a magnesium alloy heat-treated part; and finishing treatment is carried out on the surface of the magnesium alloy heat-treated part. In addition, the application also prepares a multi-element micro-alloyed Al-Zn series magnesium alloy by using the above preparation method. The application realizes the synergistic improvement of strength-plasticity-corrosion resistance by constructing a unique grain boundary dispersed micro-tube core-shell structure and combining semi-solid injection molding and special heat treatment process.

The invention discloses a thin metal strip preparation method and a thermal bimetal composite strip, and the method comprises the following steps: adopting a vacuum induction melting process to smelt all raw materials in a preset proportion to obtain alloy liquid with preset components, and pouring in a protective atmosphere to obtain an alloy ingot; the alloy cast ingot is sequentially subjected to forging, hot rolling, acid pickling and surface coping treatment, and an intermediate steel coil is obtained; the middle steel coil is subjected to multi-pass cold rolling, a strip is obtained, multi-pass cold rolling is executed through a preset deformation sequence, and at least one time of middle solution annealing treatment is conducted in the multi-pass cold rolling process; and the strip is subjected to final cold rolling and finished product solution annealing treatment, and the metal thin strip for the passive layer of the thermal bimetal composite strip is obtained. The alloy components and the purity are accurately controlled by adopting vacuum induction melting, and the corrosion resistance and the stability of thermal expansion and resistivity of the passive layer thin strip are improved by combining the multi-pass cold rolling with the preset deformation sequence and the intermediate solution annealing process.

The invention relates to the technical field of metal material preparation, in particular to a multi-stage regulation and control aluminum-lithium-magnesium-zinc system additive manufacturing alloy which is prepared through the following steps that vacuum induction smelting is conducted, specifically, weighed raw materials are smelted under the oxygen partial pressure smaller than or equal to 10 <-3 > Pa, and 0.1-0.3% O2 / Ar mixed gas is introduced for 3-8 min before pouring; homogenizing treatment is conducted, specifically, the temperature is increased to 300 + / -5 DEG C and kept for 1-3 h, then the temperature is increased to 470 + / -5 DEG C and kept for 10-14 h, and argon protection is conducted in the whole process; thermomechanical processing is conducted, multi-directional forging is conducted firstly, the total deformation is 55%-65%, and the temperature is gradually reduced to 250 + / -5 DEG C from 350 + / -5 DEG C; then hot rolling is conducted to obtain a plate with the thickness being 6 mm, the pass deformation is 12-18%, then cold rolling is conducted to obtain the plate with the thickness being 2 mm, and the total deformation is 60-70%; wherein the raw materials comprise the following components in percentage by weight: 9.0 to 10 percent of Li, 3.5 to 5 percent of Al, 1.0 to 2.5 percent of Zn, 0.2 to 0.6 percent of Sc, 0.4 to 0.8 percent of Zr, 0.3 to 0.7 percent of Mn and the balance of Mg and inevitable impurities; wherein the molar ratio of Sc to Zr is (1: 1.4)-(1: 1.6). According to the technical scheme, the molar ratio of Sc to Zr is strictly controlled to range from 1: 1.4 to 1: 1.6, and balance of high strength and good plasticity is achieved.

The invention discloses an H65 brass alloy doped with rare earth element yttrium and a preparation method and application thereof, and belongs to the technical field of alloy materials, and the H65 brass alloy doped with rare earth element yttrium comprises the following components in percentage by mass: 65% of copper element, 0.05-0.35% of rare earth element yttrium and the balance of zinc. Based on thermodynamic calculation, the range of the yttrium adding amount is obtained through phase change, and H65 brass and rare earth element yttrium are smelted in a vacuum induction smelting furnace. According to the H65 brass alloy doped with the rare earth element yttrium and the preparation method and application of the H65 brass alloy doped with the rare earth element yttrium, 0.5-0.35 wt% of the rare earth element yttrium is added into H65 brass in the smelting stage, impurities in the H65 brass are purified through the rare earth element yttrium, crystal grains are refined, the composition of the alpha / beta'phase is adjusted, the dezincification reaction is inhibited, and the quality of the H65 brass is improved. And the tensile strength, microhardness and corrosion resistance of the material are remarkably improved.

The invention belongs to the technical field of nickel-tungsten alloy preparation, and particularly discloses a medium-density high-strength high-plasticity-toughness nickel-tungsten alloy bar and a preparation method thereof, and the preparation method comprises the steps of cast ingot preparation, high-temperature homogenization, cogging forging, intermediate forging, finished product forging and heat treatment. Firstly, a cast ingot is prepared through vacuum induction melting and vacuum consumable arc melting, after high-temperature homogenization, cogging forging adopts combination of a hard sheath and a soft sheath and upsetting deformation, intermediate forging reduces the temperature and adopts upsetting, edge surface alternation and octagonal deformation, and finished product forging is subjected to room-temperature cold deformation after solution treatment. And finally, Ni4W phase precipitation is promoted through aging heat treatment. The prepared nickel-tungsten alloy bar has the density of 10.9 g / cm < 3 >-11.6 g / cm < 3 > and the tensile strength of 1600 MPa, has the characteristics of uniform structure, fine grains, medium density, high strength and high plasticity and toughness, and is suitable for the fields of industrial manufacturing, mechanical engineering and the like.

The application discloses a kind of high plasticity single crystal high-entropy high-temperature alloy without Fe and Ti and a preparation method thereof.The chemical composition of the alloy includes Co, Ni, Cr, Al, Ta, Mo and W seven elements, and the atomic percentage of each element is Co 35-45at%, Ni 30-40at%, Cr 3-5at%, Al 10-13at%, Ta 1-4at%, Mo 1-3ar% and W 3-5at%.The preparation method includes the following steps: sequentially putting elemental Co, Ni, Cr, Ta, Mo and W into the crucible of vacuum induction melting furnace for heating and melting, adding elemental Al when the temperature rises to the refining temperature, and pouring into master alloy ingot;using high-speed solidification Bridgeman method and seed crystal method to prepare single crystal high-entropy high-temperature alloy test rod with <001> grain orientation;and sequentially carrying out solid solution treatment, primary aging and secondary aging on the single crystal high-entropy high-temperature alloy test rod, to obtain the high plasticity single crystal high-entropy high-temperature alloy without Fe and Ti.The single crystal high-entropy high-temperature alloy of the application has the advantages of high-entropy alloy and single crystal high-temperature alloy, and has excellent room temperature and high temperature mechanical properties.

The invention relates to the field of metallurgy, and discloses a large-size maraging stainless steel bar and a preparation method thereof, the diameter of the bar is larger than or equal to 300 mm, and the method comprises a vacuum induction melting stage, a vacuum consumable remelting stage, a fast forging cogging stage and a precision forging forming stage; wherein the vacuum consumable remelting stage comprises an arcing stage, a stable smelting stage and a filling smelting stage; in the arc starting stage, a molten pool is formed by adopting a current of 8-12 kA; in the stable smelting stage, the smelting speed is 4.2-4.8 kg / min, the molten drop is 3-5 s <-1 >, the molten drop short-circuit time is 0.6-0.8 s, and inert gas is started to be filled for cooling after smelting is conducted by the preset weight; and in the filling smelting stage, inert gas filling is stopped, and the current and the melting speed are controlled to descend in a stepped mode. According to the method, the uniformity of components and structures can be improved, so that the mechanical property of the large-size maraging stainless steel bar is improved.

The invention discloses a method for preparing a stainless steel seamless tube with ultra-high cleanliness for an integrated circuit and an IC industry preparation device, and a stainless steel seamless tube with ultra-high cleanliness. The stainless steel seamless tube which comprises, by mass, C≤0.010%, P≤0.020%, S≤0.010%, Mn≤0.10%, Si≤0.30%, Se≤0.010%, Al≤0.010%, Cu≤0.20%, Cr16.50-17.00%, Ni14.50-15.00%, Mo2.20-2.50%, N≤0.010%, Ni≤0.010%, Ti≤0.010% and the balance Fe and impurities is prepared through a: a stainless steel refining process; b: a vacuum induction melting and vacuum consumable remelting process; c: a stainless steel forging process; d: a hot piercing process; e: a cold working process; f: an inner bore electrolytic polishing, pickling and passivation process; and g: a cleaning process. The stainless steel seamless tube with ultra-high cleanliness prepared through these processes meet the requirements for ultra-high cleanliness and high performance of 316L stainless steel tubes for a semiconductor preparation device.

A method for preparing a sealing ring material for ultra-supercritical steam turbines belongs to the field of metallic materials. A master alloy is prepared by vacuum induction melting, followed by gas-supported electroslag remelting to obtain an electroslag ingot. The composition of the electroslag ingot is (3.5–4 wt%) Fe, (7.5–8 wt%) Mn, (1.8–2.0 wt%) Nb, (1.5–1.8 wt%) Si, (1.9–2.1 wt%) Ti, (17–18 wt%) B, with the remainder being Co. The electroslag ingot is then processed into a sealing ring blank of the required size using conventional hot deformation technology, held at 250–280°C for 60–90 minutes, and then precision-machined to obtain the finished sealing ring. The material of this invention exhibits excellent wear resistance, corrosion resistance, and high-temperature resistance. Two highly hard submicron-scale dispersed reinforcing phases are formed in the Co matrix. These two reinforcing phases possess high hardness and high strength, and are small in size, ensuring excellent high-temperature resistance of the sealing ring. At application temperatures above 400°C, some Co... 54 B 40 Fe6 can dissolve into the matrix, causing the amorphous matrix lattice to expand, which is beneficial to improving the sealing performance of the sealing ring.

The application discloses in-situ nitride reinforced 3D printing nickel-based superalloy powder, and the sum of the mass percentages of components of the powder is 100% in mass percentage, and the powder comprises the following components: Co: 12-17%, Nb: 3-4%, Al: 4-6%, Ru: 0.3-3%, Ta: 1-2%, Y: 0.02-0.1%, La: 0.05-0.1%, Cr: 8-12%, Si: 0.2-1.5%, Re: 0.02-0.05%, B: 0.01-0.015%, and the balance is Ni. The powder is used for preparing a dispersion-strengthened nickel-based superalloy by in-situ generation of nitrides through 3D printing. The application prepares a new type of nickel-based superalloy powder suitable for 3D printing by reasonably designing the proportion of each alloy element, combining vacuum induction melting and atomization powder preparation technology. The nickel-based superalloy forming piece prepared by using in-situ generated Si3N4 strengthening second phase in the printing process has high density, good internal quality, few defects, excellent tensile strength and ductility, the tensile strength of the nickel-based superalloy at room temperature is up to 1.62 GPa at the highest, and the elongation is up to 16.8% at the highest.

This invention discloses a lightweight, high-strength Ni-Co-based single-crystal high-entropy alloy and its preparation method. The chemical composition of this single-crystal high-entropy alloy includes eight elements: Ni, Co, Cr, Al, Ti, Mo, W, and Hf. The atomic percentages of each element are: Ni 45-55 at%, Co 15-20 at%, Cr 9-12 at%, Al 9-12 at%, Ti 4-8 at%, Mo 1-2 at%, W 0-1 at%, and Hf 0-0.1 at%. The preparation method includes the following steps: obtaining the liquidus temperature through simulation calculation and the eutectic dissolution temperature through melting point testing; sequentially placing the elemental elements Ni, Co, Cr, Ti, Mo, and W into a crucible in a vacuum induction melting furnace and casting them into a master alloy ingot; and preparing a grain with a specific orientation using the Bridgeman high-speed solidification method and the seed crystal method. <001> A single-crystal high-entropy alloy test rod was prepared; the single-crystal high-entropy alloy test rod was subjected to solution treatment, first-stage aging, and second-stage aging in sequence to obtain a lightweight, high-strength Ni-Co-based single-crystal high-entropy alloy. The single-crystal high-entropy alloy prepared by this invention has a low density and excellent room-temperature and high-temperature mechanical properties.

The invention relates to the technical field of precise alloy materials, in particular to a high-permeability rare earth soft magnetic alloy plate for a magnetic shielding case and a preparation method of the high-permeability rare earth soft magnetic alloy plate. The alloy plate comprises the following main components in percentage by weight: 79 to 81 percent of Ni, 3.9 to 4.1 percent of Mo, 0.4 to 0.6 percent of Mn, 0.15 to 0.25 percent of Si, less than or equal to 0.02 percent of C, less than or equal to 0.015 percent of P, less than or equal to 0.008 percent of S, 0.035 to 0.055 percent of Ce and the balance of Fe and impurities. The preparation process comprises the steps of vacuum induction melting, electroslag remelting, homogenization treatment, forging, hot rolling, solution treatment, cold rolling, final heat-magnetic treatment and the like, and it is ensured that the material has excellent magnetic performance and machinability. By optimizing components and process parameters, especially adding a trace amount of Ce, the magnetic conductivity is effectively improved, the coercive force is reduced, and the magnetic shielding effectiveness and the temperature stability are improved.

The invention discloses a nickel-based high-temperature alloy coarse powder return scrap remelting method for regulating master alloy ingot components based on multi-stage material supplementing. The method comprises the following steps that chemical component values of all elements in coarse powder return scraps are detected, and material supplementing is conducted for the first time; designing the material ratio of the composite purifying agent and weighing the raw materials for later use; the packaged metal container is put into a crucible of a vacuum induction melting furnace to be smelted, and meanwhile primary purification is carried out; increasing the vacuum degree, carrying out secondary purification, and refining to obtain a coarse powder return material melt; detecting the chemical component value of each element, and supplementing the material for the second time; carrying out third purification after electromagnetic stirring treatment; chemical component values of all elements are detected, and third-time material supplementing is carried out; standing and cooling, detecting the chemical component value of each element, and supplementing the material for the fourth time; and pouring after three-stage filtration. According to the method, ultra-clean smelting and ultra-high recycling of the nickel-based high-temperature alloy coarse powder return scrap are achieved.

The invention belongs to the technical field of tin alloy target material pouring, particularly relates to a tin alloy target material pouring method and equipment for inhibiting shrinkage cavity and composition segregation, and provides the following scheme aiming at the core problems of volume shrinkage and composition segregation during solidification, easy target material shrinkage cavity, shrinkage porosity and nonuniform composition in tin alloy pouring: a vacuum induction melting furnace is adopted; a feeding box is arranged at the top end of the vacuum induction melting furnace, an out-furnace pipeline is fixedly connected to the outer side of the vacuum induction melting furnace, and an external furnace is arranged at the bottom end of the out-furnace pipeline. The tin alloy target material pouring method and equipment for inhibiting shrinkage cavities and composition segregation have the advantages that the pressure sealing cake applies constant low-pressure mechanical pressure to melt in the mold, the melt is forced to continuously shrink and feed in the solidification process, gaps formed by volume shrinkage are directly filled, shrinkage cavities and shrinkage porosity are reduced to the maximum extent, and the casting quality of the tin alloy target material is improved. And the use effect of the internal density of the target is improved.

The utility model relates to the field of vacuum induction melting furnaces, and discloses a vacuum induction melting furnace for stainless steel welding rod production, which comprises a furnace body, one side of the furnace body is rotatably connected with a furnace cover, one side of the furnace cover is rotatably connected with a lock catch, the inside of the furnace body is fixedly connected with an air pump, and one end of the air pump is provided with an air filtering assembly. An adjusting assembly is arranged in the furnace body, a melting assembly is arranged in the furnace body, a gas filtering assembly comprises an annular water pipe and a gas filtering tower, a spray head is fixedly connected to the interior of the annular water pipe, a drainage valve is fixedly connected to one side of the outer wall of the gas filtering tower, and a water inlet is fixedly connected to the interior of the annular water pipe. According to the utility model, through the synergistic effect of the annular water pipe and the gas filtering tower and the combination of an atomized water spraying system of the spray head, harmful gas and tiny impurities generated in the smelting process can be actively adsorbed and cooled, the welding performance of stainless steel welding rods is improved, and the crack resistance, high temperature resistance and corrosion resistance of the stainless steel welding rods are enhanced.

The invention relates to the technical field of silicon slag recovery and purification, and particularly discloses a silicon slag refining and purifying process which comprises the following steps: mixing silicon slag with oxide activated functional pellets, and performing synchronous activation and reduction heat treatment in a weak reducing atmosphere at 1350-1450 DEG C to realize efficient separation of a slag phase and a silicon-rich phase; and deeply removing impurities through vacuum induction melting and electron beam zone melting to obtain the high-purity silicon ingot with the purity higher than 99.999%. The oxide activation functional pellet is of a core-shell structure with a reducing carbon core and an oxide shell, controllable and efficient in-situ oxidation and slagging reaction can be achieved, impurities such as Al, Fe, P and S in silicon slag are oxidized in situ through active oxygen provided by the pellet and captured into a low-melting-point slag phase, systematic and targeted purification of the silicon slag with complex components is achieved, and the purpose of purifying the silicon slag with the complex components is achieved. The method has the advantages of wide raw material adaptability, high purification efficiency, good process flow integration degree and the like, and successfully converts the silicon slag solid waste into a high-value material.

The invention discloses a vacuum induction melting method for AlSn20Cu, and relates to the technical field of aluminum alloy preparation. The method aims to solve the problems of high gas content, more inclusions, tin segregation and poor formability of cast ingots caused by traditional atmospheric smelting. The method comprises the following steps: preparing raw materials and a mold of a lining graphite pipe, and preheating; the pure aluminum, the AlCu50 intermediate alloy and the AlSn50 intermediate alloy are loaded in sequence; after vacuumizing, inert gas is filled, and furnace burden is melted through furnace baking and melting; after stirring and standing at 760 DEG C, cooling to 720 DEG C, and carrying out vacuum degassing refining; and finally, carrying out electrified casting to a mold at 700 DEG C under the vacuum degree of 2000-3000 Pa. According to the method, vacuum induction melting is combined with a specific graphite pipe lining mold, gas and inclusions are effectively reduced, the density and the structure uniformity of the cast ingot are improved, the process is simplified through process integration, and the obtained cast ingot is accurate in component and few in defect and meets the requirement of a high-performance sliding bearing material.