281 results about "Brass" patented technology

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.

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 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.

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 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.

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 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.

The invention relates to the technical field of brass rod continuous casting, in particular to a brass rod machining continuous casting device and a working method thereof. Comprising a supporting seat, and a mounting seat is arranged at the top of the supporting seat; and a crystallization mechanism is arranged on one side wall of the mounting seat. The outer wall of the cooling copper pipe is rotationally sleeved with the inner water jacket, and a narrow gap is formed between the inner wall of the inner water jacket and the outer wall of the cooling copper pipe, so that cooling water can accelerate flowing when passing through the narrow gap, meanwhile, after long-time continuous casting work, the guide ring is controlled to drive the outer water jacket to rotationally abut against one ends of the multiple sets of connecting rods, and the cooling water is cooled. The magnetic suction scraper at the other end of the connecting rod rotates to abut against the outer wall of the cooling copper pipe, salt impurities attached to the outer wall of the cooling copper pipe are cleaned, the heat conduction effect of the cooling copper pipe is guaranteed, shutdown cleaning is not needed, cooling water is always kept in a circular flowing state, and the cooling efficiency is improved. Therefore, the working effect of the continuous casting device is improved while the continuous casting working continuity is ensured.

The application discloses a variable-distance slitting device for brass strip production, which comprises a support frame horizontally placed on the ground, a mounting frame rotatably arranged at the inner side of the right end of the support frame, a pay-off roller rotatably mounted in the mounting frame, a winding roller driven by a motor rotatably mounted at the inner side of the left end of the support frame, a fixed plate horizontally arranged and fixedly mounted at the middle position in the support frame, and slitting blades equidistantly arranged and mounted above the fixed plate. The variable-distance slitting device for brass strip production adopts a novel structure design, the slitting blades can slide on the adjusting slide, so that the edge distance is achieved, and in the process, the brass strip passes through the first guide roller and the second guide roller, the brass strip is extruded and flattened by the first guide roller, meanwhile, the heating wire in the first guide roller heats the brass strip, heat is transferred to the brass strip by the first guide roller, the internal stress of the heated brass strip is eliminated, and the flattening effect is improved.

The invention provides a technology for improving the quality of a brass continuous casting ingot. The technology comprises the following steps that S1, Cu, Pb, Fe, Al and CuMg20 raw materials are weighed; s2, the raw materials are smelted, brass flux is scattered into the raw materials, slag is fished out after stirring, then the surface of molten copper is covered with graphite flakes, then CuMg20 is added into furnace water for deoxidation and desulfurization, finally, the temperature of the smelted molten copper is kept, and argon is adopted for protection; s3, the molten brass is stably introduced into a high-purity side liquid inlet graphite mold and evenly stirred, and the traction speed and the cooling rate are controlled so that a continuous and defect-free hollow cast ingot can be drawn out; and S4, saw cutting is conducted, specifically, the drawn hollow cast ingot is subjected to saw cutting and purging, and the brass hollow cast ingot is obtained. According to the method, common defects such as air holes and inclusions in the cast ingot are effectively reduced, the internal organization structure of the cast ingot is remarkably improved, the cast ingot is more compact and uniform, and meanwhile the cost input in the production process is greatly reduced.

The invention discloses a preparation method of a micro-aging extremely-high-strength steel wire for a cord thread. The preparation method comprises the following steps: sequentially carrying out dephosphorization, acid pickling and drawing on cord thread steel with the carbon content of 0.9%-1.02%; the steel wire is austenitized in a furnace, and a brass-plated steel wire with the diameter being 1.48-1.58 mm is prepared; carrying out wet drawing on the brass-plated alloy wire; the positive electrode of the direct-current pulse power supply is connected with the steel wire before drawing of the last finished product die through a conductive wheel; adjusting parameters of the direct-current pulse power supply, wherein the mode is constant-current output; starting a wet pulling vehicle table, wherein the pulling speed of the vehicle table ranges from 1m / s to 6m / s; and the direct-current pulse power supply is turned off, and finally the 0.20 MT extremely-high-strength steel wire is prepared. Compared with the prior art, the method has the advantages that the direct-current pulse current with a certain frequency is applied to the steel wire before and after the last 1-3 passes, and the dislocation movement of internal tissues is promoted by the electronic wind effect generated by the pulse current on the steel wire, so that the aging of the steel wire is reduced; and the performance stability of the steel wire is improved, and finally the micro-aging extremely-high-strength sorbite steel wire is prepared.

This invention relates to the field of cage processing and discloses a production equipment for cylindrical roller brass bearing cages. The equipment includes a base, a fixture mounted on the base, a first cage placed on the fixture, a movable column slidably mounted on the base, a first telescopic rod slidably mounted inside the movable column, a tool mounting block fixedly mounted at the end of the first telescopic rod, a first tool mounted at the lower part of the tool mounting block, and a cutting stabilizing device mounted on the tool mounting block. This invention reduces the gap between parts when the first tool and the first cage are not in contact by contacting the contact element inside the cutting stabilizing device. This allows the adaptor and power element to rise, thereby driving the connecting element to compress the extrusion block. The extrusion block can compress the extrusion ring through the extrusion element, thus limiting the position of the first tool and allowing the first tool to be centered during processing. This reduces uneven force on the first tool during processing and lowers the processing error of the first cage.

The invention discloses a season crack resistant brass, which comprises the following components in percentage by mass: 60.2 to 64.0 weight percent of Cu, 0.001 to 2.0 weight percent of Pb, 0.1 to 0.5 weight percent of Ni, 0.01 to 0.3 weight percent of Mn, 0.001 to 0.5 weight percent of Al, 0.001 to 0.3 weight percent of Sn, 0.001 to 0.1 weight percent of Si, 0.001 to 0.3 weight percent of As, 0.002 to 0.01 weight percent of B, 0.001 to 0.1 weight percent of Zr, less than or equal to 0.01 weight percent of Bi and the balance of Zn and inevitable impurities. The brass has high seasonal crack resistance. The invention further discloses a valve manufactured by using the season-crack-resistant brass and a preparation method of the valve.

The utility model relates to the technical field of expansion water tanks, and discloses an expansion water tank capable of being inflated in a universal rotating mode, which comprises a brass inflating connector, a brass base is fixedly connected to one side of the brass inflating connector, a stainless steel connecting clamp spring is fixedly connected to the inner wall of the brass inflating connector, and an O-shaped ring is installed at the bottom of the brass base. A brass inflation connector is fixedly connected to the outer portion of the brass base, a connecting connector is fixedly connected to the outer portion of the brass inflation connector, a valve core is fixedly connected to the inner wall of the brass inflation connector, a sealing assembly is fixedly connected to the inner wall of the connecting connector, an elastic assembly is arranged on the inner wall of the sealing assembly, and an expansion water tank is fixedly connected to one side of the brass base. According to the utility model, the brass base is arranged outside the expansion water tank, and the angle is adjusted by rotating the brass gas charging connector, so that the stainless steel connecting clamp spring is driven to rotate until the clamp spring abuts against one side of the base, deforms and stores elastic potential energy, thereby limiting the rotation of the connector.

The utility model discloses an edge burr removing device for brass strip processing, which comprises a shell, and a conveying belt is arranged in the shell. A brass strip body is attached to the top of the conveying belt, a first polisher is attached to the top of the left side of the brass strip body, and the first polisher is rotationally connected to the left side of the conveying belt. A threaded rod is rotationally connected to the middle of the conveying belt, a moving plate is connected to the threaded rod in a threaded mode, a second polisher is rotationally connected to the bottom of the moving plate, and the inner side of the second polisher is attached to the side edge of the brass strip body to form a polishing mechanism. According to the edge burr removing equipment for brass strip machining, the threaded rod is installed, the threaded rod rotates to drive the second polisher to move, and then the second polisher can be adjusted according to brass strips of different sizes, so that the second polisher can remove edge burrs of the brass strips of different sizes; therefore, the use adaptability is improved.

The invention discloses a brass zipper line manufacturing process, which belongs to the technical field of brass zipper lines, and comprises the following steps: S1, alloy smelting treatment: adding electrolytic copper, a zinc ingot and an additive into a smelting furnace in proportion, and pouring into a cast ingot; s2, hot rolling treatment is conducted, specifically, the cast ingot is heated to 650-750 DEG C for hot rolling, and a rod blank is machined; s3, primary cold drawing treatment is conducted, specifically, the hot-rolled rod blank is subjected to multi-pass cold drawing; s4, intermediate annealing treatment is conducted, specifically, intermediate annealing is conducted at the temperature of 400-500 DEG C; s5, finish drawing treatment is conducted, specifically, multi-pass finish drawing is conducted, and the target wire diameter is achieved; s6, surface treatment: carrying out electroplating or passivating treatment on the zipper line; and S7, shaping, rolling and packaging. According to the manufacturing process of the brass zipper line, through alloy component optimization, a fine machining process, an environment-friendly surface treatment technology and an advanced shaping and roll-dividing packaging process, the comprehensive performance, the quality stability and the appearance quality of the brass zipper line are remarkably improved, and meanwhile the requirements for environmental protection and sustainable development are met.

To provide a Sn-plated brass plate material in which a surface layer of a structure in which a Cu layer directly contacting a brass exists is easily assembled with low cost when provided to heat treatment at a temperature where melting of Sn does not occur.SOLUTION: A Sn-plated brass plate material includes a Cu-plated layer with a thickness of 0.28-0.80 μm on a surface of a substrate made of a brass plate, and moreover, a Sn-plated layer with a thickness of 2.8-5.0 μm on the Cu-plated layer. The Sn-plated brass plate material has a property in which a Cu layer derived from the Cu-plated layer in the whole area on the substrate on which the Cu-plated layer and the Sn-plated layer are formed after heat treatment when the heat treatment is performed while being kept at 150°C for 90 minutes in atmosphere.SELECTED DRAWING: Figure 1

The invention relates to the technical field of copper alloys, and discloses a high-strength free-cutting lead brass alloy and a preparation method thereof.The high-strength free-cutting lead brass alloy is prepared from, by mass, 50%-51% of Cu, 3.2%-3.5% of Pb, 0.3%-0.6% of Fe, 0.05%-0.12% of Bi, 0.05%-0.12% of Mn, 0.04%-0.1% of Si, 44%-46% of Zn, smaller than or equal to 1.2% of the total amount of impurities and the balance Fe. The microstructure of the lead brass alloy comprises a beta phase, a Pb phase and a Fe3Si phase, the area proportion of the beta phase is larger than or equal to 95%, and the Pb phase and the Fe3Si phase are distributed in the beta phase and are dispersed phases. By reducing the content of Cu and increasing the content of Zn, a near-single-phase beta matrix is formed, the normal-temperature brittleness of the beta phase is inhibited through the cooperation of elements such as Pb, Mn, Bi, Si and Fe, and it is guaranteed that the copper alloy has good strength and cutting performance while the cost is reduced.

The invention relates to a lead- and antimony-free brass alloy containing between 56 and 66% Cu, between 0.1 and 1.5% Mg, less than 0.1% Pb, the remainder being Zn and unavoidable impurities.

The invention belongs to the technical field of cooling liquid, and particularly relates to data center cold plate type cooling liquid as well as a preparation method and application thereof. The cold plate type cooling liquid for the data center, disclosed by the invention, is prepared from the following components in parts by weight: 0.1 to 1.0 part of an organic amine compound, 0.05 to 0.4 part of a benzotriazole compound, 0.0005 to 0.004 part of a siloxane compound, 0.1 to 0.5 part of dicarboxylic acid, 30 to 70 parts of polyhydric alcohol and 30 to 70 parts of water. The cold plate type cooling liquid for the data center, provided by the invention, can pass a 1000h metal corrosion performance test, has long-period protection capability on red copper, brass, steel, 3-series aluminum, 4-series aluminum and 6-series aluminum, and is excellent in metal corrosion resistance; and the preparation process is simple, low in cost and suitable for industrial production.

A method for producing a contact element formed at least in sections from a brass alloy, and a contact element formed at least in sections from a brass alloy. In a method for producing a contact element formed at least in sections from a brass alloy, which method permits both productive and economic production of a contact element from lead-free brass alloys at least in some sections by shaping, more particularly by machining methods, and the process-safe contacting by crimping, for example of plug contacts, a blank for the contact element is first provided. Subsequently the structural state of the blank is changed by a first thermal treatment to increase the ß phase content, after which the contact element is formed from the blank with a higher ß phase content. The structural state of the contact element formed is then modified by a second thermal treatment to increase the α phase content.

The utility model provides a novel brass insert structure, and belongs to the technical field of mechanical parts. The utility model solves the problems that the existing brass insert is only provided with a fixing structure at the rear end, the fixing stability is poor, and the pipeline joints are not tight enough in butt joint and poor in sealing property due to the fact that a great twisting force is generated on the brass insert in the process of butt joint and thread screwing of the pipeline joints, and a screw slipping phenomenon is generated in the process. The novel brass insert structure comprises a brass insert, a brass piece is arranged in the brass insert in a sleeved mode, two clamping units are arranged on the brass piece, installation grooves facilitating installation of the clamping units are formed in the brass piece, clamping plates are arranged on the clamping units, one ends of the clamping plates are round and hollow, and the other ends of the clamping plates are provided with clamping grooves. A pin roller used for penetrating through and being connected with the clamping plate is arranged in the mounting groove, and a clamping groove used for fixing the clamping plate is formed in the inner wall of the brass insert. The utility model has the advantage of improving the tightness of the product.

This invention discloses a casting apparatus and casting process for lead-free brass water meter housings, relating to the field of brass casting technology. It includes a main body, a fixing unit, a pretreatment unit, a pneumatic unit, and a control unit. The fixing unit clamps the water meter housing; the control unit monitors the casting temperature in real time via a temperature sensor. When the water meter housing is in the hot brittle range above 300°C, the air supply unit only outputs airflow for gentle cooling to prevent deformation and cracking of the casting. When the temperature drops to 200°C from 300°C, the air supply unit outputs high-pressure airflow to drive a vibrating unit, using high-frequency self-excited oscillation to break down and peel off the internal molding sand. When the temperature drops below 200°C, the air supply unit outputs pulsed airflow to drive a striking unit, reciprocatingly striking the outer wall of the water meter housing to remove residual molding sand. Finally, the extraction unit uses negative pressure to extract and separate the molding sand. This invention solves the problem of easy damage or difficult sand removal of lead-free brass water meter housings at different cooling stages, achieving efficient and non-destructive sand removal.