54results about How to "The melting process is simple" patented technology

The invention provides a low-cost multi-component heat-resistant magnesium alloy and a preparation method of the magnesium alloy. The low-cost multi-component heat-resistant magnesium alloy comprises the following components in percentage by weight: 4.2-6.7% of Al, 0.5-1.2% of Zn, 0.7-0.9% of Sr, 0.2-0.8% of Ca, 1.1-1.5% of Sn, 0.8-1.3% of Sb, 0.05-0.4% of Mn, 0.2-0.6% of Bi, 0.4-0.9% of Si and the balance of Mg. According to the low-cost multi-component heat-resistant magnesium alloy, a right amount of low-cost alloy elements such as Sr, Ca, Sn, Sb, Mn, Bi and Si are introduced; the high-temperature performance of the magnesium alloy can be remarkable improved; the application range of the magnesium alloy can be expanded; the magnesium alloy is low in cost, simple in smelting and heat treatment process and uniform in microscopic structure; the mechanical performance and the heat resistance of the alloy can be remarkably improved; after the alloy is solidified and aged, the maximum room-temperature tensile strength reaches 278MPa; the maximum tensile strength at 150 DEG C reaches 236MPa; the maximum tensile strength at 200 DEG C reaches 207MPa.

The invention discloses high-frequency FeSiAl alloy powder and a preparation method of the high-frequency FeSiAl alloy powder and belongs to the technical field of powder preparation. According to thepreparation method, rodlike polished iron, bulky metal silicon and pure aluminum ingots are used as raw materials, material mixing and weighing are conducted according to the ratio, and alloy steel liquid of the needed component is obtained through vacuum smelting; and then, alloy raw powder is prepared through inert gas atomization is prepared, and fine powder is obtained after the raw powder iscollected and screened. By the adoption of the high-frequency FeSiAl alloy powder, the alloy powder uniform in component and high in purity is obtained beneficially, the sphericity degree of the powder is high, a uniform compact insulated layer can easily form after insulated cladding, contact of an alloy matrix is effectively isolated, a pressed magnetic powder core has the advantage of low consumption and is suitable for a high-frequency scene.

The invention discloses an aluminum alloy material capable of being used for manufacturing a cylinder cover. The aluminum alloy material is characterized by consisting of the following components in percentage by mass: 45-50% of waste aluminum intermediate alloy powder, 7-7.5% of silicon, 3% of glass fiber powder, 0.4-0.45% of zinc, 0.2-0.25% of magnesium, 0.06-0.08% of scandium, 0.01-0.02% of arsenic, 0.05-0.07% of titanium and the balance of aluminum. According to the invention, by optimizing alloy components, adopting a scientific and reasonable thermal treatment process, and adding a rare earth element scandium, the aluminum alloy material has degassing effect; a smelting process is simple, scientific and easy to operate, complex operation equipment is not required, mechanical property, especially high-temperature mechanical property of the alloy can be improved, the stability of a strengthening phase can be improved, separation and growth of the strengthening phase can be prevented, and impact resistance of the alloy is improved. The product has high strength, light weight, good resilience force, and various qualified indexes, and is suitable for producing an engine cylinder cover.

The method for preparing semisolid slurry for magnesium alloy ultralow temp. casting includes the processes and steps of melting magnesium, adding compound fire-resisting elements, adding alloy elements, heat-insulating and standing still and semicontinuous casing. Said invention utilizes the addition of compound fire-resisting elements to implement magnesium alloy smelting free from covering agent, and utilizes the pouring process which is made under the condition of the temperature of liquid phase line or the temperature below liquid phase link at a certain cooling rate after properly standing still to implement that its interior has no dirt inclusion or porosity.

The invention discloses a method for producing huge high-purity nickel ingot square billets through a four-gun electron beam cold bed furnace. The method comprises the following steps that electrolytic nickel with the purity of 99.5 percent is selected, the surface of the electrolytic nickel is cleaned, the electrolytic nickel is cut into small blocks with the diagonals smaller than or equal to 120 mm, the small blocks are cleaned, dried and smelted in the electron beam cold bed furnace, continuous casting is carried out through a square crystallizer, and the huge high-purity nickel ingot square billets are obtained. According to the method, the electron beam cold bed furnace is used for carrying out smelting, the smelting speed is high, the whole smelting process is carried out under a highly vacuum condition, air pollution is avoided, and gas impurities can be effectively eliminated. As a refining cold bed is arranged, removal of saturated low-steam-pressure impurities, high-density impurities and low-density impurities can be realized in the smelting process, and smelting and purification can be carried out simultaneously. By replacing the crystallizer, the huge high-purity nickel ingot square billets of different specifications can be produced, the processes of skinning, forging and the like in the prior art are simplified, the production cost is reduced, and the production efficiency of nickel plates and strips is largely improved.

The invention discloses a casting method of zinc base alloy for a stamping die basal body, including moulding, pouring, clotting and taking out cast product; wherein molten zinc base alloy is poured in a cavity exposed in the air during pouring. The invention is convenient in raw material (zinc base alloy) selection, a pouring system is not required to be designed during moulding as casting in open is adopted, the technology of removing the pouring system in post cleaning is spared, thus being convenient; the zinc base alloy cast product can be directly molten down to be utilized repeatedly, melting process is simple, cost is low, and casting speed is fast, thereby being especially applicable to making of fast moulding mould for car stamping parts; and especially for sample car mould of a large outer panel, cost can be saved and mould making period can be shortened, thus reducing development cost of entire car and shortening development period of entire car.

The invention discloses a silicon and aluminum alloy material used for a novel cylinder cover. The silicon and aluminum alloy material used for the novel cylinder cover is characterized by being composed of, by mass, 7-8 parts of silicon, 0.2-0.25 part of magnesium, 0.55-0.6 part of zinc, 2.5-3 parts of nickel, 0.1-0.3 part of titanium, 45-50 parts of aluminum scrap intermediate alloy powder and the balance aluminum. By optimizing alloy components and adopting a scientific and reasonable heat treatment technology, the mechanical property of an alloy can be improved, and particularly the high-temperature mechanical property of the alloy can be improved; besides, stability of chemical phases can be improved, strengthening phases are prevented from being precipitated and growing larger, and the impact resistance of the alloy is improved. The smelting process of the manufactured aluminum alloy material is simple and easy to operate, no complicated operating devices are needed technologically, and the alloy material is universal, beneficial to popularization and capable of being used for manufacturing engine cylinder covers.

The invention relates to a multi-element heat-resistant magnesium alloy and a preparation method thereof. The multi-element heat-resistant magnesium alloy comprises, by weight, 5.5%-6.5% of Sm, 3.5%-5% of Sn, 2.5%-4% of Zn, 0.5%-1.0% of V, and the balance Mg and inevitable impurities. According to the multi-element heat-resistant magnesium alloy, the alloy is endowed with good aging precipitationstrengthening and solid solution strengthening effects by the Sm; the Sn is capable of forming a high-melting-point Mg2Sn intermetallic compound in the magnesium alloy, so that the effect of dispersion strengthening is achieved; the performance of a surface film can be improved by the Zn; and the V is added to enable the microscopic structure of the magnesium alloy to be obviously refined, and theeffect of fine grain strengthening can be achieved; The alloy elements mutually support one another and synergistically act in the above proportion range, the room temperature mechanical property andthe high-temperature mechanical property of the magnesium alloy are remarkably improved, the plasticity of the magnesium alloy is improved, and the application range of the magnesium alloy is expanded.

The invention discloses a non-aluminium low-calcium lead-silver-calcium rare earth alloy and a preparation method thereof; the non-aluminium low-calcium lead-silver-calcium rare earth alloy comprisesthe following components by weight percent: 0.15 to 0.7 percent of silver, 0.03 to 0.09 percent of calcium, 0.02 to 0.08 percent of rare earth metal, and the balance lead. The preparation method comprises the following steps: raising the temperature to 400 to 500 DEG C, to melt the lead in a lead-melting furnace and then holding the temperature; adding the silver, calcium and rare earth metal withweight ratio in lead solution, stirring, and applying a direct-current potential difference of 3 to 36V between a melt and the furnace in the stirring process; standing 30 to 50 minutes after the melt is evenly alloyed, removing oxidizing slag on the surface of the melt and obtaining the non-aluminium low-calcium lead-silver-calcium rare earth alloy. The invention is characterized by low impedance of an anodic oxide film, good corrosion resistance and long service life.

The invention relates to a pure copper smelting cleaner and a preparation method thereof. The pure copper smelting cleaner comprises the components in percentage by weight as follows: 20-30% of Aoki powder, 20-30% of cullet 7SiO2.2Na2O, 40-50% of calcium carbide CaC2, 5-10% of borax Na2B4O7 and less than or equal to 1% of other impurities. The preparation method comprises the following steps of: burning Aoki to block charcoal; preparing cullet in sheet which is 10-15mm; preparing calcium carbide in a drying environment to particles which are 10-20mm, and then vacuum packaging; placing borax crystalline to a resistance furnace, first, melting to remove crystal water at about 900 DEG C, then condensing to block; then, preparing particles which are 5-10mm; and preparing and packaging the components in the drying environment, packaging and vacuumizing, and then, storing in the drying environment for later use.

The invention relates to a flame retardant magnesium alloy material and a preparation method thereof, and belongs to the technical field of magnesium alloys and manufacturing thereof. The flame retardant magnesium alloy material is prepared from the following components in percentage by mass: 8.6 to 10.4 percent of Gd, 2.6 to 3.4 percent of Nd, 1.6 to 2.9 percent of Ce, 1.1 to 1.5 percent of Al, 1.1 to 1.6 percent of Sb, 0.26 to 0.38 percent of Sr, 0.78 to 1.0 percent of Ca and the balance of Mg and unavoidable impurities. Compared with the prior art, the flame retardant magnesium alloy material disclosed by the invention has the advantages that by reasonable matching of different elements, the comprehensive performance of the flame retardant magnesium alloy material is obviously improved, particularly the mechanical performance and the flame retardancy characteristic at room temperature and high temperature are obviously improved; and meanwhile, the tensile strength of the flame retardant magnesium alloy material has an abnormal temperature effect, namely with the increase of tensile temperature, the tensile strength is also improved.

The invention relates to the technical field of amorphous alloys, in particular to a method for rapidly smelting a zirconium-based amorphous alloy master alloy. The method comprises the following steps that a niobium block and sponge zirconium are pretreated to obtain niobium particles and a zirconium electrode; the niobium particles, the zirconium electrode and the rest alloy raw materials are uniformly mixed to obtain alloy raw materials; a crucible is installed in an inductor, baking and vacuumizing are carried out, and the crucible is preheated through coil induction heating; the alloy rawmaterials are added into the crucible, protective gas is introduced, and the raw materials are heated to be molten uniformly through coil heating, poured into a mold and cooled, and therefore the zirconium-based amorphous alloy master alloy is obtained. The raw materials are pretreated, the sponge zirconium is mechanically compacted, zirconium is change from a honeycomb structure to a solid structure, induction melting is facilitated, and ingredient uneven caused by element nonmelting in the melting process can be avoided; the niobium block is crushed into small niobium particles, therefore niobium is easier to melt, and the problem that niobium is not thorough in melting due to the high melting point is solved.

The invention discloses an energy-saving environment-protecting secondary lead multi-chamber metal smelting furnace and a treatment method and belongs to the technical field of secondary metal smelting. A furnace shell is mounted on a furnace foundation; a smelting furnace device and a gasification furnace are connected into a whole; a furnace steel frame is disposed outside the furnace shell to tightly hoop the furnace shell; a refractory material furnace building body is disposed on the inner side of the furnace shell; the smelting furnace device communicates with the upper portion of the interior of the gasification furnace through a smoke channel; liquid slag chutes are disposed between the smelting furnace device and the gasification furnace; the two ends of the liquid slag chutes communicate with liquid slag outlets of the smelting furnace device and liquid slag inlets of the gasification furnace correspondingly; smoke outlets are formed in the smelting furnace device and communicate with flues; and flue gates are disposed on the flues. The two sides of the top of the gasification furnace are connected with the flues of smelting furnaces, straight flowing of liquid hot slag can be achieved, the flues mutually communicate, the gates are opened and closed to control the smoke flowing direction so as to perform smelting, gasification, heat preservation and pre-heating on materials, continuous material feeding is performed during production, continuous melting is performed, latent heat of the liquid slag and waste heat of the smoke are utilized, the environment-protectingeffect is good, and the economic benefits and social benefits are remarkable.

The invention discloses a high-temperature antioxidant heat storage aluminum alloy, which aims to overcome the problem of high-temperature easy oxidation of heat storage aluminum alloy. The heat storage aluminum alloy comprises the following components by weight percent: 10.0-14.0 percent of Si (silicon), 1.0-4.0 percent of Mg (magnesium), 10.0-20.0 percent of Cu (copper), 0-0.5 percent of RE (rear earth) and the balance of Al (aluminum); the heat storage aluminum alloy has good comprehensive performance, especially higher oxidation resistance, due to the addition of trace mixed rare earth elements; the oxidation kinetics curve is coincident with the parabolic law based on 650-DEG C quasi-isothermal oxidation experiments and the oxidation time of less than 250 hours and shows that the oxidant film has better protection; after 150 thermal circulations, the latent heat of phase change is maximally reduced only by 3.53 percent, the starting phase change temperature is just reduced by 0.1 DEG C, the final phase change temperature is just increased by 3.1 DEG C, and therefore the heat storage aluminum alloy shows better thermal stability. The heat storage aluminum alloy has good high-temperature oxidation resistance, simple melting process, and is easily achieved industrial production; and the raw materials of the alloy are rich and obtained easily.