20 results about "Tin bronze" patented technology

This invention discloses a method for combining CNC high-precision high-temperature resistant insulating substrate engraving with tin-copper alloy printed circuit 3D printing, belonging to the field of high-power circuit carrier manufacturing technology. The invention uses 99.7% alumina ceramic or silicon nitride ceramic as the insulating substrate, achieving high-precision structural forming of ±0.005-0.025mm through CNC layer engraving. Sandblasting, roughening, sensitization, activation, and pre-plating surface modification enhance interfacial adhesion. CuSn10 tin bronze is used as the printing material, and the circuit is formed by SLM or FDM 3D printing at a sintering temperature of 850-900℃, achieving a forming density ≥98.71%. Through stepped heating sintering and high-temperature resistant inorganic adhesive curing, the ceramic substrate and tin-copper alloy circuit are integrated. The circuit carrier obtained by this invention has a long-term temperature resistance of ≥1600℃, a volume resistivity of ≥10¹⁴Ω·cm, a current carrying capacity of 15.6A for 3mm lines, and an adhesion strength retention rate of ≥95% after 1000 thermal cycles. The temperature rise is 15~20℃ lower than that of traditional PCBs. It is suitable for high-load, high-current scenarios such as industrial power supplies and new energy power control. It is compatible with processes and has complete industrial support, and has significant technical and economic feasibility.

The utility model discloses a device for taking out a guide sleeve assembly of a steam turbine high-pressure combined valve hydraulic servo-motor, which relates to the technical field of tools for taking out guide sleeve assemblies of hydraulic servo-motors and comprises an outer ring, a plurality of tin bronze lining tiles used for taking out copper sleeves are arranged on the circumferential side of the inner ring of the outer ring, and threaded holes are formed in the periphery of the outer ring. A lead screw is connected into each threaded hole in a screwed mode, and a connecting assembly matched with the lead screws is arranged in the middle of the outer side face of the tin bronze lining tile. According to the taking-out device, the outer ring is matched with the lining tile and the lead screw, the aim of rapidly taking down the guide sleeve assembly of the valve hydraulic servo-motor is conveniently achieved, the lining tile is matched with the connecting assembly and the lead screw, the guide sleeve assemblies with different diameters can be rapidly taken down, and the taking-out device is simple in structure, convenient to operate and high in practicability. The guide sleeve assembly can be safely and rapidly disassembled, the labor intensity of workers is greatly relieved, and the working efficiency of disassembling operation is effectively improved.

The invention relates to a method for rapidly and accurately determining the content of tin in tin bronze by using ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry), which comprises the following steps: taking A grams of tin bronze, adding B milliliters of concentrated hydrochloric acid and C milliliters of hydrogen peroxide, and dissolving the tin bronze; after supplementing D milliliters of concentrated hydrochloric acid, adding water to fix the volume to V milliliters to obtain a sample solution with the volume fraction of hydrochloric acid being E%; mixing B milliliters of concentrated hydrochloric acid and C milliliters of hydrogen peroxide, supplementing D milliliters of concentrated hydrochloric acid, and adding water to fix the volume to V milliliters to obtain a blank solution with the volume fraction of hydrochloric acid being E%; measuring the sample solution and the blank solution by using ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry), and calculating the mass concentration rho1 of the sample solution and the mass concentration rho0 of the blank solution in combination with a tin standard solution working curve; based on the volume V of the sample solution, the mass A g of the tin bronze, the mass concentration rho1 of the sample solution and the mass concentration rho0 of the blank solution, the mass fraction of tin in the tin bronze is calculated. The method can improve the accuracy of the test result and the test speed.

The invention discloses a method for preparing a dual-phase heterogeneous deformation mechanism tin bronze alloy through stacking fault energy-oriented Sn content regulation and control and the alloy, and relates to the technical field of metal materials. The method comprises the following steps: determining a critical component window of a low-Sn glide region and a high-Sn twinborn region on the basis of an influence rule of Sn content on an alpha-Cu solid solution stacking fault energy and a deformation mechanism; through the combination of melt instantaneous cooling induced nucleation and a rheological extrusion forming process, the synergistic distribution of two phases on the microscopic scale is realized in the tin bronze alloy. In the plastic deformation process of the obtained tin bronze alloy, dislocation slippage is used as a dominant deformation mechanism in a low-Sn area, mechanical twinning is used as a dominant deformation mechanism in a high-Sn area, and a heterogeneous deformation coordination mechanism is formed. The alloy prepared through the method shows excellent strength and toughness, and therefore a new path is provided for design and preparation of the high-performance copper alloy.

The invention discloses a sliding bearing surface modification method which comprises the following steps: pretreating a sliding bearing matrix to obtain a clean and dehumidified surface; the pretreated base body is fixed to a rotating tool so as to ensure the stability and concentricity in the cladding process; cladding a nickel-based alloy middle layer on the surface of the matrix by adopting a cold metal transition electric arc additive manufacturing technology; machining the nickel-based alloy intermediate layer to remove surface oxide skin and formed ripples so as to obtain a flat substrate; cladding a copper-based alloy wear-resistant layer on the machined middle layer by adopting a cold metal transition electric arc additive manufacturing technology; and carrying out stress relief treatment on the clad workpiece. Through the gradient design that the nickel-based alloy is firstly cladded to serve as the middle layer and then the tin bronze is cladded to serve as the wear-resistant layer, the problem that direct combination is difficult due to large physical property difference between the steel substrate and the copper alloy is effectively solved.

The application discloses a kind of antimony bronze-steel bimetallic composite and preparation method thereof, including copper alloy layer and steel matrix, wherein the copper alloy layer is composed of the following components by weight percentage: Pb 10%~20%, Sb 4%~6%, Mn 4%~6%, Ni2%~5%, Zn 1%~3%, and the balance of copper, total amount of impurities is not more than 2%.The antimony bronze-steel bimetallic composite prepared by the application uses antimony bronze instead of commonly used tin bronze in the copper alloy layer, which reduces the manufacturing cost of the bimetallic composite, and through reasonable design of the antimony bronze formula, the strength and hardness of the antimony bronze are increased, and the bimetallic copper layer has good lubrication and friction reduction effect.

This utility model relates to a coated cover plate and a fixture for testing it. The coated cover plate includes: a glass substrate as the base for the coating layer; a magnesium fluoride coating layer, a tin bronze alloy coating layer, and a Ni-B-Si alloy coating layer sequentially coated on the glass substrate from the outside to the inside; and a thermochromic ink screen printing layer, an aluminum bronze alloy layer, and a niobium carbide layer sequentially coated from the inside to the outside. The thickness of the magnesium fluoride coating layer is 50-100 nm; the thickness of the tin bronze alloy coating layer is 20-30 nm; the thickness of the Ni-B-Si alloy coating layer is 20-30 nm; the thickness of the glass substrate is 0.5-3 mm; the thickness of the thermochromic ink screen printing layer is 8-12 μm; the thickness of the aluminum bronze alloy layer is 30-40 nm; and the thickness of the first niobium carbide layer is 15-25 nm. This novel cover plate coating layer structure, through a carefully designed multi-layer coating technology, achieves a comprehensive improvement in the performance of the glass cover plate.

The invention belongs to the field of additive and subtractive manufacturing and machining, and particularly relates to an additive and subtractive device and method for preparing a tin bronze cladding bionic layer on the surface of 45 steel. The laser cladding device comprises a controller, a machine frame, a clamp mechanism arranged on the machine frame and used for clamping a workpiece to be machined, a laser cladding mechanism arranged on the machine frame and used for conducting laser cladding on the workpiece to be machined, and a grinding mechanism arranged on the machine frame and used for grinding the workpiece to be machined. The bionic texture machining mechanism is arranged on the rack and used for conducting bionic texture machining on the workpiece to be machined, the real-time monitoring mechanism is used for monitoring the state of the workpiece to be machined in real time, and the laser cladding mechanism, the grinding mechanism, the bionic texture machining mechanism and the real-time monitoring mechanism are all electrically connected with the controller. The tin bronze cladding bionic layer prepared on the 45 steel surface replaces a copper alloy plate, so that the cost can be greatly reduced.

The invention discloses an MXene-coated ZrOhybrid filler reinforced polyimide composite coating as well as a preparation method and application thereof, and belongs to the technical field of functional coating materials. The method comprises the following steps: firstly, respectively carrying out surface modification on MXene and nano ZrO by virtue of dopamine and a silane coupling agent KH550, and then synthesizing an MXene-coated ZrO hybrid filler with a particle-plane structure by virtue of electrostatic and chemical effects; then introducing the hybrid filler into a polyamide acid precursor through an in-situ polymerization method, and forming a composite coating on the surface of a metal substrate through coating and gradient thermal imidization. According to the hybrid filler, the dispersity and interface combination of the hybrid filler in a matrix are remarkably improved, so that the coating has high hardness, strong adhesive force and excellent antifriction and wear-resisting properties. Experiments show that the friction coefficient of the coating is reduced by about 48% compared with that of a tin bronze matrix, the wear rate is reduced by about 91%, the coating is suitable for wear-resistant protection of surfaces of harsh friction pairs such as a hydraulic pump bearing bush pair, and the service life of parts can be remarkably prolonged.

This invention relates to a friction-reducing plate with a graphite-tin bronze sintered layer and its preparation method. The friction-reducing plate is obtained by the following steps: First, a substrate is selected and its surface is pretreated. Then, tin bronze powder is spread and sintered once. Afterward, it is vacuum-immersed in an oil-based graphite lubricant containing PAO, flake graphite powder, silica sol, alumina sol, phosphate ester, and oil-soluble polyester modified silicone oil. After a first drying, it is vacuum-immersed in an acidic curing initiator solution, dried a second time, and sintered a second time to anchor the graphite particles in the pores. Finally, it is cooled to room temperature to obtain the finished friction-reducing plate. In this technical solution, the graphite particles in the pores on the surface of the tin bronze sintered layer of the friction-reducing plate are uniformly penetrated and have a strong bonding force with the tin bronze sintered layer. This provides excellent and long-lasting self-lubricating properties while avoiding weakening the strength of the tin bronze sintered layer.

The application relates to the field of wind power bearing lubrication, and discloses a clad copper-based composite coating material, a preparation process and application of the clad copper-based composite coating material, which comprises the following components: 60-80% of aluminum bronze or tin bronze powder and 20-40% of a lubricating phase, wherein the lubricating phase is formed by mixing at least two kinds of powders selected from graphite, polyphenyl fat, bentonite, CaF2 and MoS2. The multiple-component lubricating phase is used to realize synergistic lubrication, the self-lubricating property of the coating is remarkably improved, and the friction coefficient is reduced; the lubricating phase is coated by the copper-based alloy powder, decomposition of the lubricating phase in the process of super-high-speed laser cladding is avoided, the functionality of the lubricating phase is ensured, and the service life of the coating is remarkably improved; and the technical problems of poor self-lubricating property and low bonding strength of existing sliding bearings in the field of wind power are solved.

The invention discloses multi-station production equipment based on manganese zinc ferrite magnetic cores, and relates to the technical field of magnetic core production, the multi-station production equipment comprises a powder pressing machine and a first assembly installed on the powder pressing machine, the first assembly comprises a guide rod fixedly connected in the powder pressing machine, a pressing machine lead screw is arranged in the middle of the guide rod, and the pressing machine lead screw is driven by an external motor; due to the fact that the reset spring and the powder scraping ring are arranged, the powder scraping ring is made of tin bronze soft materials, arranged on the outer circle of the upper punching module in a sleeving mode and connected with the punch connecting disc through the reset spring, during pressing, the powder scraping ring is blocked by the top face of the magnetic core type module, the reset spring is compressed to enable the powder scraping ring to move upwards relative to the upper punching module, and pressing is not interfered. During resetting, the reset spring rebounds to push the powder scraping ring to move downwards relative to the upper punching module, the inner wall of the powder scraping ring can automatically scrape residual magnetic powder on the surface of the upper punching module, the situation that the amount of powder in a cavity deviates during next pressing due to powder residues is avoided, meanwhile, the scraped powder can fall back into the magnetic core type module, the powder utilization rate is increased, and raw material waste is reduced.

The invention discloses a wide-spot tin bronze laser cladding method, and belongs to the technical field of laser remanufacturing. The method comprises the following steps: physically dehumidifying tin bronze powder; the minimum critical preheating temperature of the base material is determined based on the dynamic relation between the molten pool solidification life and the bubble escape time; configuring a rectangular flat-top wide light spot, and calculating a critical power density upper limit based on a tin element saturated vapor pressure model; and performing laser cladding under the condition that the actual power density is controlled to be maintained in a preset safety range. According to the method, the multi-physics field coupling model and the wide light spot technology are combined, the temperature gradient is reduced through the flat-topped light beams, the machining efficiency is remarkably improved, meanwhile, tin element burning loss is effectively restrained, the number and size of air holes in the coating are reduced, and preparation of the tin bronze coating with the low dilution rate and the high quality is achieved.

The application discloses a nickel-chromium coated tin bronze self-lubricating composite coating and a preparation method thereof. Tin bronze powder is placed in a chemical plating chromium solution, and is kept at 70-90 DEG C for 110-130 min to obtain a chemical plating composite powder. The nickel-chromium coated tin bronze self-lubricating composite coating is sprayed on the surface of an alloy base by using a wide-speed-range high-energy plasma spraying method. The self-lubricating composite coating prepared by the application has a NiCr alloy phase dispersedly distributed in the structure, and a Cr-rich phase is dispersed in the coating in the form of a small unit with a diameter of 1 micrometer, which serves as a dispersion strengthening phase, promotes the increase of the slip resistance of plastic deformation of the coating, and improves the mechanical strength of the coating. The introduced Ni and Cr react with the tin bronze during the spraying process to generate a new alloy phase, changes the regular layered arrangement of metal atoms, makes the relative sliding between the atom layers difficult, and is beneficial to improving the mechanical strength and fracture toughness of the coating.

The application discloses a high-strength and high-plasticity lead-tin bronze alloy and a preparation method thereof, and belongs to the technical field of copper alloy preparation. The application comprises the following steps: (1) the lead-tin bronze alloy is subjected to induction heating smelting and deoxidation, degassing and deslagging treatment, and after the alloy melt surface is pushed away to be mirror-like, the alloy melt is uniformly placed; (2) the alloy melt uniformly placed in the step (1) is subjected to quenching modification treatment, and a semi-solid slurry is obtained; (3) the semi-solid slurry obtained in the step (2) is poured into a preheated mold and extruded, the castings after extrusion forming are kept in the mold for a certain time and then rapidly oil-cooled to room temperature, and lead-tin bronze castings are obtained; and (4) the lead-tin bronze castings are subjected to solid solution and aging treatment, and the high-strength and high-plasticity lead-tin bronze alloy is obtained. The lead-tin bronze alloy prepared by the application has high strength and plasticity, and can meet higher use requirements.

The utility model relates to the technical field of coating gaskets, and discloses an anti-corrosion metal coating gasket which comprises a tin bronze ring material, a filling layer and a stainless steel ring material, the tin bronze ring material is located in the filling layer, and the stainless steel ring material is located on the outer side of the filling layer. The filling layer comprises a polytetrafluoroethylene coated ring material and a nickel-based alloy coated ring material, the filling layer is formed by winding the polytetrafluoroethylene coated ring material and the nickel-based alloy coated ring material, a plurality of groups of auxiliary devices are arranged on the outer side of the tin bronze ring material, and the filling layer is provided with insertion holes matched with the auxiliary devices. According to the scheme, the tin bronze ring material, the filling layer and the stainless steel ring material are arranged, so that the device has good anti-corrosion performance, the device is stable when corroded by chemicals such as strong acid, strong alkali, aqua regia and strong oxidants, the application range of the device is widened, and the use practicability of the device is improved.

The invention discloses a method for improving the sintering speed and uniformity of composite shaft sleeve copper powder, and belongs to the field of sliding bearings. The method mainly comprises the following steps of: obtaining static friction and rolling friction coefficients of copper powder by using a Hall current meter, discrete element software and a copper powder friction test; a tin bronze particle model and a composite shaft sleeve steel belt and scraper three-dimensional model are established, and the influence of the copper powder particle size and the like on powder laying uniformity is obtained; carrying out numerical simulation on a copper powder particle high-temperature sintering process, researching the influence of temperature and the like on forming, and predicting values of sintering process parameters; taking roughness distribution, porosity and speed of a sintering layer as response indexes, selecting sample points, and designing variables as sintering process parameters; and constructing an approximation model by using a polynomial regression method, and carrying out multi-objective optimization design on the parameters by using an adaptive response surface method to obtain optimal process parameters. The sintering speed of the composite shaft sleeve copper powder can be increased on the premise that the sintering quality is guaranteed, and a core method basis is provided for improving the production efficiency and reducing the reject ratio of products.

The application discloses a casting method of thin-wall bronze parts, which comprises the following steps: 1) mold making, 2) resin sand molding, 3) smelting and pouring, 4) sand cleaning and the like. The application adopts purple clay sculpture mold, can make mold with complex artistic form and is convenient for form modification. The artistic casting has complex form and more curved surfaces, the application adopts calcium plastic skin which is easy to form and can ensure uniform wall thickness and is convenient for operation. According to the solidification characteristics of tin bronze, the application adopts an open pouring system of top pouring type and a pouring system structure of one mold and two cavities, improves the molding efficiency, reduces the resin sand consumption and the molding cost, does not contain heavy metals such as lead and is more environmentally friendly and healthy. The application adopts high-temperature boiling refining and can obtain high-quality copper liquid.

This invention discloses a method for preparing modified polytetrafluoroethylene (PTFE) retaining rings based on secondary hot pressing, comprising the following steps: Step S1: Raw material preparation: Selecting PTFE suspension fine powder with an average particle size ≤15μm as the substrate; selecting nano-sized tin bronze powder, chopped glass fiber, molybdenum disulfide, and ceramic powder as modified fillers; Step S2: Mixing: By weight percentage, dry mixing of 50-60% PTFE powder, 30-45% nano-tin bronze powder, 3-8% glass fiber, 1-5% ceramic powder, and 0.5-3% molybdenum disulfide to obtain a uniform mixture; Step S3: Primary molding; Step S4: Primary sintering; Step S5: Secondary molding; Step S6: Secondary sintering; Step S7: Constant temperature precision machining; Step S8: Inspection and packaging. The beneficial effect of this invention is to solve the problem of the difficulty in maintaining stable dimensional accuracy of highly filled PTFE composite products due to uneven internal density and thermal expansion over a long period.

The present application relates to a kind of standard substance technical field, specifically to a kind of silicon brass, tin bronze and beryllium bronze spectral analysis standard substance and preparation method, the chemical composition composition and content range of the standard substance are as follows: Zn:0.0003~16%;Sn:0.0001~6%;P:0.002~0.04%;Mn:0.0004~0.02%;Fe:0.02~0.07%;Ni:0.001~6%;Si:0.0005~3.6%;Ag:0.001~0.003%;Cu:80~97%;Pb:0.0005~0.005%;Sb:0.0002~0.003%;As:0.0001~0.0003%;Mg:0.004~0.007%;Cr:0.01~0.02%;Co:0.001~2.8%;Al:0.0003~0.05%;Be:0.6~2.1%;Ti:0.07~0.09%;Zr:0.01~0.03%.The component design and preparation process of the silicon brass, tin bronze and beryllium bronze spectral analysis standard substance of the present application are reasonable, after uniformity test and stability investigation, standard substance uniformity and stability are good.