43results about How to "No macrosegregation" patented technology

The invention provides a manufacturing method of micron and nanometer metal spherical powder. The manufacturing method comprises the steps of 1 preparing metal powder; 2 preparing evenly mixed powder of the metal powder and carbon material powder or ceramic material powder; 3 performing high-temperature annealing to enable metal to be molten and solidify to form a metal ball, wherein the temperature for the high-temperature annealing is the temperature for metal melting, especially the temperature is higher than metal melting point temperature and ranges from 40 DEG C to 100 DEG C; 4 removing the carbon material powder or the ceramic material powder to obtain the micron and nanometer metal spherical powder. All metals of the metal spherical powder are elemental metals containing gold, silver, copper, aluminum, gallium, tin, zinc, lead, iron, cobalt, nickel, rare earth and the like, and alloy and compounds formed by the elemental metals are alloy and compounds formed by the metals including boron, silicon, carbon, phosphorus, germanium, nitrogen and the like and nonmetal.

Disclosed is a manufacturing method of spherical bronze alloy powder. The manufacturing method includes steps of preparing bronze alloy powder; preparing uniform mixture of the alloy powder with carbon powder or ceramic powder; subjecting the uniform mixture to thermal treatment so as to melt bronze alloy and solidify to obtain metallic balls; separating the carbon powder or ceramic powder to obtain spherical alloy powder. The component of the bronze alloy includes CudSnaXbYc according to the weight percentage, wherein X indicates one or several kinds of Al, Be, Zn, Ni, Cr, Mn, Co, F3, Ag, Sb and Pb, Y indicates one or several kinds of Li, Ti, In, RE, P, Si and B, the weight percentage of a, b and c is 1-40, 0-30 and 0-2 respectively, and the balance is the weight percentage of d. The manufacturing method of the spherical bronze alloy powder is simple and applicable to bronze alloy added to multi-element intensified elements.

The invention mainly aims at providing a forming method of a hydrogenation reactor barrel. The method is efficient, low in cost and good in mechanical property. The method comprises the steps that an electric smelting head and a base material are connected to two electrodes of a power source, and in the forming process, metal raw material wires are conveyed to the surface of the base material through a conveying mechanism and the electric smelting head; under accumulation protection of granular auxiliary materials, an electric arc is generated between the raw material wires and the base material, and a molten slag pool is formed by stacking and laying the auxiliary materials on the smelting portion; current flows through the raw material wires and the molten auxiliary material slag pool to form resistance heat and electric slag heat; under the effect of three component high-energy heat sources of electric arc heat, the resistance heat and the electric slag heat, the raw material wires are molten; a local molten pool is formed on the surface of the base material, and the raw material wires and the auxiliary materials are continuously conveyed; according to layered section data of a forming component, a computer is adopted to control relative movement of the electric smelting head and the base material; and the aim that the molten pools are rapidly cooled, solidified and stacked layer by layer on the base material is achieved, and finally the hydrogenation reactor barrel is formed.

The invention relates to an ultrahigh strength aluminium alloy material and a preparation method thereof. The ultrahigh strength aluminium alloy material is characterized by comprising the following concrete components in percentage by weight: 12-14% of Zn, 2.4-3.2% of Mg, 1.0-1.5% of Cu, 0.2-0.5% of Zr, 0.1-0.3% of Mn, 0.1-0.6% of Ni and the balance of Al. The preparation method of the ultrahigh strength aluminium alloy material comprises the following steps: smelting raw materials, moulding a billet, carrying out machining deformation on the billet, carrying out solution treatment for 1 hour at the temperature of 450 DEG C and for 2 hours at the temperature of 475 DEG C, and carrying out manually intervened natural ageing treatment for 240-360 hours at the temperature of 70-80 DEG C. The ultrahigh strength aluminium alloy material is prepared by adopting a spray deposition technology, solution strengthening treatment is carried out on alloy, and aging treatment, carried out for 240-360 hours at the temperature of 70-80 DEG C, instead of the traditional natural ageing treatment is adopted, so that natural ageing time is shortened, and mechanical properties of the alloy are improved; meanwhile, the developed ultrahigh strength alloy is uniform and tiny in structure, has no macrosegregation and has the performances that tensile strength is 780-820MPa, yield strength is 700-740MPa, elongation percentage is 9-13% and fracture toughness property is 30-35MPa.m<1/2>, so that overall performance of the ultrahigh strength aluminum alloy material is at the international advanced level.

The invention provides an electric smelting forming method of a CAP1400 main steam pipe penetration piece which is efficient, low in cost and excellent in mechanical properties. According to the method, an electric smelting head and a substrate are connected to the two poles of a power source; while forming, a metal raw material wire is conveyed to the surface of the substrate by a conveying mechanism and the electric smelting head; under the protection of the accumulation of granular accessories, the electric arc is generated between the raw material wire and the substrate to melt partial surfacing accessories to form a molten slag pool; the current flows through the raw material wire and the molten slag pool to form resistance heat and electro-slag heat; under the actions of the three composite high-energy heat sources, namely the electric arc heat, the resistance heat and the electro-slag heat, the raw material wire is melted to form a local molten pool on the surface of the substrate; the raw material wire and the accessories are fed continuously; the relative movement of the electric smelting head and the substrate is controlled by a computer according to the stratified slicing data of a formed part so as to realize quick cooling and layer-by-layer solidification accumulation of the molten pool on the substrate, and finally, the main steam pipe penetration piece is formed by virtue of layer-by-layer accumulation.

The invention discloses a continuous production process of an injection molding ingot. The production process adopts the organic combination of the injection molding technology and the skew rolling mill assembly continuous rolling technology; the injection molding adopts an atomizing nozzle to atomize alloy fluid flowing from a guide tube into tiny molten drops by inert gas such as nitrogen gas, argon gas, and the like, or the mixture thereof, and the molten drops deposit on a dummy sketch to form the ingot; the dummy sketch and the ingot rotate with the skew rolling mill assembly, and move outwards with the rotation of the skew rolling mill assembly; and the ingot is rolled by an inner skew roll of the skew rolling mill to form a round billet and realize the densifying and continuous production. The continuous production process solves the problems that the density of the existing injection molding ingot is low, and the ingot is restricted by the mechanical structure of an ingot depositor and the inner chamber size of an atomization chamber; and the continuous production process can realize production of infinitely long ingots.

The invention provides an electric-smelting formation method for a barrel of a pressure vessel of a nuclear power station. According to the method, electric arc heat, resistance heat and electro-slag heat are combined to form a high-energy heat source for smelting continuously-conveyed metal wires so that the metal wires are solidified and stacked layer by layer on a base material to form a metal component; a computer is used for controlling relative movement between an electric smelting head and the base material so as to realize rapid cooling and layer-by-layer solidification and stacking on the base material in a smelting bath, and finally the barrel of the pressure vessel of the nuclear power station is formed. The electric-smelting formation method provided by the invention has the advantages of high efficiency, low cost, good mechanical properties and the like.

The invention discloses a neodymium iron boron magnet surface flame spray welding layer and a preparation method thereof. The method comprises the step of neodymium iron boron magnet surface pretreatment in which the magnet is subjected to chamfering, sand blasting and pickling in sequence, and after cleaning, the magnet is preheated, the step of flame spray welding layer preparation in which theflame spray welding technology is adopted to perform spray welding of spray welding powder on the surface of the preheated magnet, and the step of heat treatment in which heat treatment is carried outon the magnet after spray welding and preparation of the neodymium iron boron magnet surface flame spray welding layer is completed. Through pretreatment optimization, the flame spray welding layer with good compactness, corrosion resistance and high bonding strength is successfully prepared on the surface of the sintered neodymium iron boron magnet, and the failure to apply the flame spray welding technology to sintering of the surface protection on the neodymium iron boron magnet in the prior art is remedied.

The invention discloses a CAP 1400 main steam pipe penetration assembly electric smelting forming method. Through a heating source of high energy which comprises arc heat, resistance heat and electro slag heat, metal wires transported continuously are smelted, the smelted product is solidified and accumulated layer by layer on a base material to be made into shaped metal components; according to layered section data of the shaped components and through relative movement between an electric smelting head controlled by a computer and the base material, a molten pool is fast cooled, and solidified and accumulated layer by layer on the base material, and the CAP 1400 main steam pipe penetration assembly are formed finally. The CAP 1400 main steam pipe penetration assembly has the advantages of high efficiency, low cost, good mechanical property and the like.

The invention relates to a preparation method of a vacuum centrifugal TiAl intermetallic compound plate, comprising the following steps: S1, smelting: smelting pure Ti and pure Al into a TiAl alloy melt; S2, centrifugal casting: pouring the TiAl alloy melt into a centrifugal In the casting mold of the casting equipment, the alloy melt is constrained to form under the action of centrifugal force to obtain a TiAl alloy cast tube billet; S3, cutting: cutting the TiAl alloy cast tube billet to obtain a TiAl alloy billet; S4, pressing and forming: The TiAl alloy billet is pressed and surface treated to obtain a TiAl alloy slab. The invention adopts the method of vacuum centrifugal casting, so that the liquid TiAl alloy melt can be directly and rapidly condensed to form a tube blank, and then the structure and size are effectively controlled by pressing forming, and a TiAl alloy slab that can be directly used or suitable for thermal deformation processing is prepared. The realization of low-cost, short-process and large-scale manufacturing broadens the industrial application of TiAl alloy plates.