503 results about "Brass" patented technology

The invention relates to the technical field of powder metallurgy, in particular to a preparation process of a graphene composite profile prepared from brass waste, which comprises the following steps: selecting the brass waste containing different components according to the application scene of the graphene composite profile; the brass waste materials are smashed into brass block-shaped smashed materials; the preparation method comprises the following steps: adding 0.001-10% by mass of graphene into the brass block-shaped crushed aggregates, and carrying out wet ball milling to form a first-size mixed powder liquid; carrying out semi-solid rotary shearing and stirring processing on the mixture; and continuously extruding the graphene-brass mixed base material to form a graphene composite profile blank, and carrying out post-process to obtain the graphene composite profile capable of overcoming brass spot, line and surface defects. According to the invention, a powder metallurgy process is combined with a medium-temperature continuous extrusion process, so that the brass waste is efficiently and directly recycled without pollution, and the physical properties and chemical properties such as hardness, strength, conductivity, corrosion resistance and high-temperature creep resistance of the composite material are greatly improved. The invention further correspondingly discloses the graphene composite profile and application.

The invention relates to the technical field of friction plates for vehicles, and particularly discloses a resin-based friction plate for an aluminum-ceramic brake disc and a preparation method of the resin-based friction plate for the aluminum-ceramic brake disc. Steel fibers serve as a main reinforcing phase, the structural strength of the material is improved, and meanwhile the steel fibers are good friction increasing materials; the reduced iron powder can improve the heat-conducting property of the brake pad and reduce the decline of the friction coefficient at high temperature; the red copper powder and the brass powder are good lubricants, the stability of single braking can be improved, and meanwhile abrasion is reduced; the silicon carbide mainly plays a role in increasing the high-temperature friction coefficient; molybdenum disulfide is beneficial for improving the recovery performance after high-temperature decline and reducing abrasion; antimony sulfide is lubricated at high temperature, and the friction coefficient in the decline stage is increased; silicon carbide is a high-hardness material, so that the friction coefficient is increased; the potassium magnesium titanate lamellar crystal improves the damping characteristic of the material and absorbs vibration and reduces noise, and the resin-based friction plate has the advantages of being high in strength, good in heat conduction, stable in friction performance, resistant to abrasion, comfortable in braking and the like and meets the use requirement of an aluminum ceramic brake disc.

The present invention provides an outdoor unit of a heat pump unit, comprising: a fin heat exchanger, including a left end plate, a right end plate and fins, wherein a first heat exchange component and a second heat exchange component are sequentially arranged in the fins from top to bottom, the first heat exchange component includes m first heat exchange copper tubes stacked from top to bottom, and the second heat exchange component includes n second heat exchange copper tubes stacked from top to bottom; a gas collecting pipe, and the first ends of the m first heat exchange copper tubes and the n second heat exchange copper tubes are all connected to the gas collecting pipe; a liquid separation component, including a first liquid separation pipe, a second liquid separation pipe and a first one-way valve, the second liquid separation pipe is connected to the first liquid separation pipe through the first one-way valve, and the flow direction of the first one-way valve is from the second liquid separation pipe to the first liquid separation pipe; the first liquid separation pipe includes a brass distributor, the brass distributor is connected to the second ends of the m first heat exchange copper tubes and the second liquid separation pipe through pipelines, and the second liquid separation pipe is connected to the second ends of the n second heat exchange copper tubes through pipelines, and it has good defrosting effect.

The invention discloses an efficient refining method for red impure copper. The efficient refining method comprises the following steps: (1) preparing calcium-cerium composite oxide powder; (2) preparing boron-phosphorus doped powder; (3) preparing a refining auxiliary agent; (4) red impure copper is put into a crucible, a medium-frequency induction furnace is adopted for heating and melting the red impure copper into a melt, the melt is covered with charcoal after being completely melted, the temperature of the melt is kept at 1110-1120 DEG C, then the refining auxiliary is added, and the mass ratio of the refining auxiliary to the melt is (3-4) kg: 1 t; and after charging, stirring the melt at a constant temperature of 1110-1120 DEG C for 10 minutes, then standing for 15 minutes, deslagging, casting and molding to obtain the refined impure red copper. After refining through the method, the tensile strength and the electric conductivity of the impure red copper can be remarkably improved, and the use performance of the impure red copper is improved.

The invention discloses a multi-directional combined extrusion forming method for an environment-friendly lead-free copper profiled bar, and relates to the technical field of profiled bar processing, and the method comprises the following steps: S1, blank preparation: selecting a lead-free copper alloy blank, pretreating the surface of the blank, and removing an oxide layer and impurities; s2, die assembly is conducted, specifically, a combined multi-directional die is adopted and comprises an axial extrusion die, a radial extrusion die and an angle-adjustable circumferential auxiliary die, all the dies are connected through high-precision positioning devices, and the relative position precision of the dies in the extrusion process is ensured; and S3, multidirectional preheating is conducted, specifically, the assembled mold and blank are placed in a multidirectional heating furnace, multidirectional uniform preheating is conducted on the blank, the heating rate is controlled to be 5-10 DEG C / min, the temperature of the blank reaches 650-750 DEG C, and meanwhile the temperature of the mold is kept to be 550-650 DEG C. Through time sequence cooperation of axial, radial and circumferential pressure, a three-way pressure stress field is formed in the blank, and the problem of hot cracking of lead-free alloys such as bismuth brass caused by a grain boundary brittle phase is effectively inhibited.

The present invention relates to a lead-free brass alloy comprising: 55 to 59% by weight of Cu, 2.0 to 2.5% by weight of Mn, 0.65 to 1.5% by weight of Si, less than 0.1% by weight of Pb, the remainder being Zn and unavoidable impurities. The invention further relates to a machine element which is produced from the lead-free brass alloy.

A wire electrical discharge machining (WEDM)-adapted wire electrode includes a core material composed of brass having a zinc concentration of greater than 40 mass %, and a coating layer covering a periphery of the core material, wherein the coating layer is composed of brass having a zinc concentration higher than the zinc concentration of the core material and of 44 mass % or more and 50 mass % or less, and wherein a ratio of a thickness of the coating layer to a diameter of the WEDM-adapted wire electrode is 2% or more and 20% or less.

The invention discloses a wind generating set blade lightning protection resistor detection tool and detection method in the technical field of wind power generation equipment detection, and the wind generating set blade lightning protection resistor detection tool is of a hollow elliptical conical brass skeleton matched pure copper wire mesh structure. The profile curve is matched with the appearance of the blade tip of the wind generating set, and fixed connecting points are arranged on the two sides of the cone bottom and the cone top of the brass framework. High-strength brass is adopted as a framework structure, and the stability and durability of the tool are ensured by means of the excellent mechanical property of the high-strength brass; meanwhile, a low-resistance pure copper wire mesh is selected as a conductive part, so that the high efficiency of current conduction is guaranteed. And three fixed connection points are elaborately designed on the two sides and the top of the brass framework, so that the tool can be conveniently and stably mounted and fixed with a detected part, the reliability of the tool in the use process is ensured, and great convenience is provided for field detection operation.

The invention belongs to the technical field of copper alloys, and particularly relates to a method for regulating and controlling a copper alloy texture through gradient temperature control deformation. The method for regulating and controlling the copper alloy texture through gradient gradient temperature control deformation comprises the following step that gradient gradient temperature control deformation is conducted on a copper-based material. According to the method, the texture type and distribution can be effectively regulated and controlled, and the Brass texture content is greatly reduced; in addition, by means of the method, the content of the Y texture beneficial to plasticity can be increased, and the plastic deformation capacity of the copper alloy is greatly enhanced on the basis that the strength of the copper alloy is kept.

According to the preparation method of the free-cutting lead brass alloy, trace elements such as tellurium, cobalt, samarium and selenium are added into lead brass, the tellurium, the selenium and the like can easily form low-melting-point compounds with other elements, grain growth can be inhibited, dispersed distribution of fine lead particles is promoted, stress concentration is reduced, and the cutting performance is improved; by adding cobalt, samarium and the like, grain refinement is facilitated, distribution and forms of selenium, tellurium and other elements are changed, alloy fluidity is promoted, dispersed distribution of lead and the like is promoted to be more uniform, the cutting performance is further improved, in addition, dissolution of lead can be inhibited through the passive film layer, the environment-friendly performance is improved, and harm caused by dissolution of lead is reduced.

The invention relates to the technical field of metallurgy, and provides brass and a preparation method thereof.The preparation raw materials of the brass comprise the following components of 0.05-0.15 wt% of Al, 0.05-0.15 wt% of Cu, 0.05-0.15 wt% of Ti, 0.05- Si, 0.05 wt% to 0.15 wt%; 0.05 to 0.12 wt% of Fe; sn, 0.03 wt% to 0.20 wt%; 0.40 to 2 wt% of Bi; 0.40 to 2 weight percent of In; 32 to 45 wt% of Zn; and the balance of Cu. The brass prepared through the composition proportion of all the preparation raw materials has a stable alpha phase, a stable beta phase and a stable In-rich phase, the alpha phase is a matrix phase, the beta phase is distributed in the alpha phase, the In-rich phase is distributed in the alpha phase and at the grain boundary, the cutting performance of the brass can be improved while the strength, wear resistance and corrosion resistance of the brass are guaranteed, and the service life of the brass is prolonged. And a brass product prepared from the brass prepared from the elements greatly reduces pollution and harm to the environment and human bodies.

The invention relates to the technical field of metal connection, and discloses a welding forming process of an aluminum alloy copper bar and a terminal, which comprises the following steps: sequentially carrying out mechanical cleaning, chemical oil removal and chemical activation pretreatment on the surfaces to be welded of an aluminum alloy base material and a brass terminal; the aluminum-based brazing filler metal foil and the potassium fluoroaluminate scaling powder are sequentially arranged between the aluminum alloy base material and the brass terminal, and an assembly to be welded is assembled; and finally, placing the assembly in hot pressing equipment under vacuum or inert atmosphere protection, carrying out constant-temperature and constant-pressure treatment at the temperature of 600-630 DEG C and under the pressure of 5-15 MPa, cooling, relieving the pressure, and molding. According to the method, a metallurgical bonding transition layer which is compact in structure and free of welding defects is formed at an aluminum-copper dissimilar metal interface under the combined action of liquid-phase filling and solid-phase diffusion, and a prepared welding joint has mechanical shear strength superior to that of an aluminum alloy base material and extremely low interface contact resistance; and reliable connection with high strength and high conductivity is realized.

The invention belongs to the technical field of anti-freezing solutions, particularly relates to an anti-freezing cooling liquid and a preparation method and application thereof, and provides an all-organic heat transfer system anti-freezing cooling liquid which contains efficient all-organic adsorption acid and an anti-corrosion inhibition additive, has better anti-corrosion and anti-rust capabilities on various metals, and has a good anti-freezing effect. And the anti-corrosion agent has excellent anti-rust function for soldering tin, cast aluminum, cast iron, steel, brass, red copper and the like, especially the anti-corrosion performance of a wet cylinder sleeve of a heavy-duty vehicle. The lubricating oil has excellent cavitation erosion resistance and pitting corrosion resistance, and has an excellent protection effect on an engine cooling system. The anti-freezing cooling liquid product is free of precipitates, stable in performance, safe, non-toxic, green and environment-friendly.

The utility model provides an impurity removal device during brass strip smelting, and relates to the technical field of impurity removal devices, the impurity removal device comprises a bottom plate, a smelting furnace is fixedly connected to the bottom plate, a removal structure is arranged on the bottom plate, the removal structure mainly comprises a hydraulic cylinder, the hydraulic cylinder is rotatably connected to the bottom plate, and the hydraulic cylinder is connected to the bottom plate. A rectangular plate is fixedly connected to a piston rod of the hydraulic cylinder, a first motor is fixedly connected to the rectangular plate, a rotating rod is fixedly connected to an output shaft of the first motor, a movable plate is fixedly connected to the rotating rod, a fixed plate is rotatably connected to the rotating rod, and a fixed column is fixedly connected to the fixed plate; the utility model solves the problem that at present, most workers stand beside the smelting furnace and hold a slag salvaging shovel to salvage out impurities in the smelting furnace, and the temperature of brass solution in the smelting furnace is extremely high, so that the workers are easily scalded.

The invention relates to a high-strength heat-resistant brass alloy and a preparation method thereof, and belongs to the technical field of copper alloys. The high-strength heat-resistant brass alloy comprises, by mass, 69%-75% of Cu, 0.1%-1% of Sn, 1%-4% of Al, 0.5%-1.5% of Ni, 0.5%-1% of Fe and the balance Zn. The high-strength heat-resistant brass alloy comprises a core-shell structure precipitated phase with Fe wrapped by NiAl. The preparation method comprises the following steps: step 1, preparing materials; step 2, smelting; step 3, casting; fourthly, hot rolling is conducted after high-temperature solid solution; fifthly, a roughly-rolled plate is obtained through cold rolling; step 6, softening and annealing; seventhly, a finish-rolled plate is obtained through cold rolling; and step 8, performing stress relief annealing to obtain the high-strength heat-resistant brass alloy. By reasonably selecting alloy components and further regulating and controlling the heat treatment process, the brass alloy has high strength, high elongation, high hardness, high-temperature stability and excellent electric conductivity.

The invention relates to a preparation method of a double-layer high-temperature adhesive for connecting brass and aluminum oxide, which comprises the following steps: reacting aluminum hydroxide, zirconium hydroxide and dilute phosphoric acid to prepare an aluminum zirconium phosphate adhesive base solution, and compounding silicon powder, boron carbide, titanium powder, nickel powder and the adhesive base solution to prepare a special adhesive for coating a brass surface. And compounding silicon powder, boron carbide, titanium powder, nickel powder, aluminum oxide and the gum base solution to prepare the special adhesive for aluminum oxide surface coating. The brass surface coating special glue is brushed on the brass surface and cured, then the aluminum oxide surface coating special glue is brushed on the aluminum oxide surface, the brass coated with the adhesive and the aluminum oxide coated with the adhesive are attached together in the mode that the bonding surfaces are opposite, and the brass / aluminum oxide double-layer bonding piece is obtained after pressing and curing and can serve in the high-temperature environment. The method has the advantages that the special glue for brass surface coating and the special glue for aluminum oxide surface coating have high thermal expansion coefficient matching with brass and aluminum oxide, and thermal stress can be relieved; the double-layer adhesive can provide the bonding strength which can reach 1.3 MPa at the temperature of 500 DEG C.

The invention relates to the technical field of metallurgy, and provides a high-strength wear-resistant brass alloy and a preparation method thereof.The preparation raw materials of the high-strength wear-resistant brass alloy comprise 35-40 wt% of Zn; 1 to 5 wt% of Ni; 1 to 3 weight percent of Mn; 0.5 to 1 wt% of Si; 0.3 to 1 wt% of Pb; and 50 to 60 wt% of Cu. Through the synergistic effect of the elements, the preparation and processing difficulty of the high-strength wear-resistant brass alloy is reduced, and the prepared high-strength wear-resistant brass alloy has high strength and excellent wear resistance.

A brazed joint that can suppress the decrease in joint strength even when brass (50, 60) containing bismuth instead of lead and stainless steel (10) are joined by brazing with a solder material, and a method for producing the brazed joint are provided.A brazed joint made of stainless steel (10) and brass (50, 60), provided with a layered structure in which stainless steel (10), a first brazing material layer (20), a barrier layer (30), a second brazing material layer (40) and brass (50, 60) are arranged successively in layers, wherein the barrier layer (30) is a layer that blocks the transfer of bismuth in the brass (50, 60) to the first brazing material layer (20) by brazing the stainless steel (10) and the brass (50, 60), wherein the barrier layer (30) contains at least either a brass (50, 60) or a phosphor bronze, and a brazing material from which the first brazing material layer (20) and the second brazing material layer (40) consist is liquid at 680 to 800°C.

To provide a brazed joint which can inhibit reduction of joint strength even when a brass which contains bismuth in place of lead and stainless steel are brazed with a brazing material, and to provide a manufacturing method of the brazed joint.SOLUTION: A brazed joint of stainless steel and a brass includes a layer structure in which the stainless steel, a first brazing material layer, a barrier layer, a second brazing material layer, and the brass are sequentially arranged in a laminar manner. The barrier layer blocks bismuth in the brass from being moved to the first brazing material layer by brazing the stainless steel and the brass to each other. The barrier layer is at least one of brass and phosphor bronze. A brazing material forming the first brazing material layer and the second brazing material layer is a liquid at a temperature ranging from 680 to 800°C.SELECTED DRAWING: Figure 1

The invention relates to the technical field of brass materials, in particular to a high-strength and high-toughness brass material and a preparation method thereof.The preparation method comprises the steps that a porous oxide film layer is prefabricated on the surface of brass through plasma electrolytic oxidation, and an oxide film layer doped with double-bond silver-loaded graphene oxide is constructed on the surface of the brass; the preparation method comprises the following steps: firstly, preparing modified MXene, then preparing a photocurable hole sealing coating for hole sealing treatment, introducing double-bond silver-loaded graphene oxide and the modified MXene as fillers into the photocurable hole sealing coating, firstly performing sulfhydrylation on the MXene by using 3-mercaptopropyltriethoxysilane, and then grafting a double-bond-containing bis-benzimidazole ring derivative through light click to obtain the modified MXene; vinyl-terminated polyurethane is used as a cross-linking agent, o-phenyl phenoxyethyl acrylate, butyl acrylate, glycidyl methacrylate and octadecyl acrylate are compounded to serve as an acrylic monomer, a diluent and a solvent are introduced, a complex cross-linked network is constructed, and the service life of the brass material is prolonged.

To provide a joint structure which can inhibit reduction of joint strength even when a brass which contains bismuth (Bi) in place of lead and stainless steel are brazed with a brazing material, and to provide a manufacturing method of the joint structure.SOLUTION: A joint structure in which a stainless member and a brass member are brazed, includes a layer structure in which the stainless member, a first brazing material layer, a Bi barrier layer, a second brazing material layer, and the brass member are sequentially arranged in a laminar manner. The brass member contains Bi, and the Bi barrier layer inhibits Bi in the brass member from being moved to the first brazing material layer by brazing of the stainless member and the brass member.SELECTED DRAWING: Figure 1

Electrical conductor for earthing, comprising at least one metal wire comprising an aluminium core, at least one copper layer cladding said core, at least one coating layer of a metal selected f rom tin, nickel, bronze, brass, zinc, chrome, coating the copper layer. Said at least one coating layer has a thickness of from 2 to 50 pm. Compared to copper, the earthing conductor according to the present invention provides protection against corrosion, is flexible, robust in processing, resistant to bending during installation, provides equivalent performance in terms of melting current and electrical resistance, is about 40% lighter, has lower costs, is equally recyclable but with a different working process that makes it more difficult to recover immediately, thus discouraging theft.

The invention relates to the technical field of underwater acoustic transmitting transducers, and particularly discloses a curved longitudinal vibration type underwater acoustic transmitting transducer based on a 3D printing technology and a preparation method thereof, the curved longitudinal vibration type underwater acoustic transmitting transducer comprises a metal shell, a plurality of groups of rigid foam plastic, a plurality of groups of piezoelectric ceramic wafer piles, a plurality of prestressed bolts, a metal mass block and a transmitting end with a cavity, each group of piezoelectric ceramic wafer stack is composed of forward polarization piezoelectric ceramics and negative polarization piezoelectric ceramics, the polarization directions of the forward polarization piezoelectric ceramics and the negative polarization piezoelectric ceramics are opposite, and brass gaskets are arranged in the middle and on the two sides of each group of piezoelectric ceramic wafer stack respectively and used for leading out electrodes; according to the underwater acoustic transmitting transducer, the transmitting end is manufactured through the 3D printing technology, the integrality is high, the influence of secondary assembly on work of the underwater acoustic transmitting transducer is reduced, and good work stability of the underwater acoustic transmitting transducer can be guaranteed.

The present invention discloses a borax-type drossing agent and its application in brass smelting. The borax-type drossing agent includes borax, boron ore, fluorite powder, carbon powder, and soda ash. When using the borax-type drossing agent of the present invention to smelt brass, the metal content in the furnace ash decreases, the copper ash becomes fluffy, reducing the loss of valuable metals and lowering the production cost.

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.

To enhance adhesive performance to rubber without using a catalyst metal such as cobalt.SOLUTION: An alkaline aqueous solution is brought into contact with the 1A of the steel cord plated with brass (step 12), a silane-coupling agent aqueous solution is brought into contact with the 1A of the steel cord contacted with the alkaline aqueous solution (step 13), and the 1A of the steel cord contacted with the silane-coupling agent aqueous solution is heated (step 14). The contact step with the silane coupling agent aqueous solution (step 13) and the heating step (step 14) are repeated a plurality of times.SELECTED DRAWING: Figure 1

The utility model provides a short-process brass pipe cast rolling device, which relates to the technical field of copper pipe cast rolling and comprises a cast rolling shell, a surrounding sliding rail is fixedly mounted in the cast rolling shell, a cast rolling support is mounted on the surrounding sliding rail in a sliding manner, a positioning sliding block is fixed on the cast rolling support, a pipe rolling assembly is mounted on the cast rolling support in a sliding manner, and the positioning sliding block is fixed on the positioning sliding block. The pipe rolling assembly comprises a mounting plate, a finishing roller and a connecting beam, a cast-rolling motor is fixed to the cast-rolling support, the output end of the cast-rolling motor is connected with a reciprocating lead screw, a reciprocating nut is fixed to the connecting beam, a rotating assembly is rotationally connected to the cast-rolling shell, and the rotating assembly is connected with the finishing roller. A sliding ratchet block is installed on the side, facing the rotating assembly, of the positioning sliding block, a ratchet ring is arranged on the side, facing the sliding ratchet block, of the ratchet ring, and the sliding ratchet block is clamped to the ratchet ring in a concave-convex fit mode. The pipe rolling assembly is driven by the rotating assembly to rotate, so that a plurality of side faces of a copper pipe can be rolled by the finishing roller, and the casting and rolling precision of the copper pipe is improved.

This application relates to a brass rod processing equipment, specifically to the technical field of automatic copper rod processing. The equipment includes a base, on which a rotating disk is rotatably mounted horizontally. A driving component for rotating the rotating disk is fixed inside the base. Several clamping components are evenly distributed on the top surface of the rotating disk. Around the rotating disk on the top surface of the base, a feeding assembly for automatically moving the conductive rod to the clamping components for clamping, a first opening component for processing a fixed hole, a second opening component for processing a first and second threaded hole, a tapping assembly for processing threads on the inner walls of the first and second threaded holes, and a discharging assembly for automatically unloading the processed conductive rod. This application avoids the tedious process of repeatedly adjusting the clamping state in traditional processing, greatly saving time and reducing the labor intensity of workers.

1. Name of the product in this design: All-copper table clock (8159). 2. Purpose of this design: To tell time. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the key design points: Design 1 3D view. 5. The bottom surface of this product is a part that is not easily seen or cannot be seen during use, so the bottom views of Design 1 and Design 2 are omitted. 6. Design 1 is designated as the basic design.

1. Name of the designed product: engraving tool (solid brass). 2. Use of the designed product: the designed product is used for carving articles. 3. Design points of the designed product: in shape. 4. Picture or photo that best shows the design points: design 1 perspective view. 5. Design 1 is designated as the basic design.