58 results about "Tin bronze" patented technology

The utility model discloses a large-scale tin bronze pressure disc centrifugal casting mold, which belongs to the technical field of centrifugal casting, and comprises a mold assembly, a suspension plate, a pouring assembly and a guide pipe, the mold assembly is assembled on a vertical centrifugal casting machine, the suspension plate is suspended above the mold assembly, the pouring assembly is assembled on the lower surface of the suspension plate, and the guide pipe is arranged on the suspension plate. The cooling pipes are evenly arranged in the annular cavity of the outer mold, the total length of each set of cooling pipes is short, cooling capacity can be effectively provided to promote cooling of castings, the segregation phenomenon is effectively reduced, meanwhile, isometric crystals can be formed easily, the casting quality is improved, the casting quality is improved, and the casting quality is improved. In addition, by means of the designed pouring assembly and the designed guide pipe, molten metal can be shunted, even pouring can be achieved in the cavity, the flow speed of the molten metal is increased, the centrifugal rotating speed is matched, the retention time of the molten metal in the cavity is shortened, the lead phase sedimentation window is reduced, and the product quality is improved.

The invention relates to a preparation method of a titanium alloy coating on the surface of a steel base material. The preparation method comprises the following steps: preparing titanium alloy powder; the method comprises the following steps: pretreating a steel base material, and preheating in advance; uniformly coating the tin bronze powder on the surface of the steel base material by using a binder; under argon protection, a copper transition layer is prepared on the surface of a steel base material in a laser cladding mode, and then the surface of a cladding layer is polished to be flat in a machining mode; uniformly coating titanium alloy powder on the surface of the material treated in the step d by using a binder; under argon protection, a titanium alloy coating is prepared on the surface of the steel base material through a laser cladding method; and the surface of the cladding layer is polished to be flat in a machining mode, and preparation of the titanium alloy coating is completed. The titanium alloy coating obtained through the method is fully fused with a base body, defects are avoided, the surface quality of a cladding layer is flat, and the titanium alloy coating has the characteristic of excellent corrosion resistance, can resist salt mist for 3000 h and further has excellent wear resistance.

The invention discloses a bimetallic sliding bearing and an additive preparation method thereof. The preparation method comprises the following steps: surfacing a welding wire A and a welding wire B on the surface of a steel substrate in a double-wire welding alternate arcing manner; during alternate arcing, the welding wire A is melted firstly, then the welding wire B is melted, the welding wire A and the welding wire B are arranged in an inclined and crossed mode, and the center lines of the two welding wires are focused on the same point of the surface of the steel base body; the welding wire A comprises any one of a pure tin wire, a tin-nickel alloy wire and a nickel-tin plated welding wire; and the welding wire B comprises a pure copper wire or a copper alloy wire. Two molten pools are mixed by controlling double-wire components, wire feeding angles and welding parameters, so that in-situ synthesis of high-tin bronze is realized, and the problem that the high-tin bronze welding wire is difficult to prepare is solved; an iron-tin phase formed by the tin-melting welding wire firstly can effectively prevent liquid copper from permeating into a carbon steel substrate, and permeation cracks can be reduced or avoided; and a variable polarity technology is introduced, so that the heat input of a matrix is greatly reduced, the propagation of permeation cracks is inhibited, and the bonding strength of heterogeneous additive materials is improved.

The invention relates to the technical field of tin bronze laser cladding forming processes, in particular to a tin-copper alloy and a tin-copper alloy laser cladding process. The tin-copper alloy comprises, by mass, 11%-13% of Sn, 0.05%-2.0% of P, 0.5%-5.0% of Ni, 0.5%-3.5% of Cr, 0.2%-2.0% of rare earth elements and the balance copper and unremovable impurities, the rare earth elements are a mixture of La and Ce, La, Ce and P are added in the form of phosphorus copper balls, and the particle size of finished product powder of the tin-copper alloy ranges from 50 micrometers to 120 micrometers. According to the tin-copper alloy and the tin-copper alloy laser cladding process, the energy utilization rate is extremely high, and meanwhile the porosity is lower.

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 present disclosure provides a bimetallic self-lubricating composite coating and a preparation method thereof, which relates to the technical field of metal coating modification. The bimetallic self-lubricating composite coating includes: a heat-conducting bearing layer and a lubricating and anti-friction layer; wherein: the heat-conducting bearing layer includes a copper alloy, and the copper alloy includes tin bronze and / or aluminum bronze; the lubricating and anti-friction layer includes a tin-based babbitt alloy matrix, a solid lubricant, and a plurality of hard phases. The bimetallic self-lubricating composite coating provided by the present disclosure can use the copper alloy as a heat-conducting bearing layer and use the tin-based babbitt alloy matrix, the solid lubricant, and the hard phase as a lubricating and anti-friction layer, thereby maintaining the mechanical strength, hardness, thermal conductivity, and heat resistance of the copper alloy, and lubricating and anti-friction can be performed based on the babbitt alloy, thereby solving the problem in the related art that the copper alloy has insufficient compliance, poor adaptability to the bending and misalignment of the shaft and the bearing, and relatively poor lubrication performance.

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 preparation method of a high-strength and high-toughness lead-tin bronze rod of the present invention relates to the technical field of lead-tin bronze rod processing, and specifically relates to a preparation method of a high-strength and high-toughness lead-tin bronze rod, including the following steps: heating metal materials containing lead, tin, nickel, and the remaining component being copper to a liquid state, pouring them into a water-cooled copper mold and starting the water-cooling cycle to obtain a as-cast lead-tin bronze alloy; assembling the as-cast lead-tin bronze alloy in the blind hole on a copper sleeve to form a combined blank body; performing annealing treatment and applying a glass lubricant, and spraying a cubic boron nitride mold release agent spray on the mold; placing the combined blank body in a tapered mold for hot extrusion; and performing heat treatment to obtain a high-quality lead-tin bronze rod meeting the standards; the present invention can reduce the surface cracking problem caused by the contact friction between the lead-tin bronze and the mold, improve the hot brittleness problem in the hot working process of the alloy, inhibit the generation of cracking problems in the extrusion deformation process, and finally obtain a rod without crack defects on the surface and in the core.

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 belongs to the technical field of oil removal type oil-water separation materials, and particularly relates to a preparation method and application of a super-hydrophobic super-oleophylic oil-water separation tin bronze net, and the preparation method comprises the following steps: cutting and cleaning the tin bronze net to remove surface stains; and then selectively etching the surface layer in a mixed solution of hydrochloric acid, alcohol and a copper corrosion inhibitor. And washing with hydrochloric acid to remove surface residues such as a corrosion inhibitor and the like. The method comprises the following steps: adding liquid or solid unsaturated aldehyde into a closed container as a steam source, and putting a tin bronze net which is blow-dried by cold air into aldehyde steam containing air; the contact angle between water in the air and the resulting tin bronze mesh is greater than 160 degrees, the rolling angle is less than 3 degrees, and the oil contact angle is about 0 degree. By utilizing the opposite wettability to oil and water, the obtained tin bronze net can be used for separating oil-containing sewage. And the material can be recycled. The tin bronze net has good acid, alkali and salt resistance, and the contact angle is higher than 160 degrees for a solution with the pH of 3-11 and a 3% NaCl solution. The method is simple in process and suitable for large-area production, special equipment is not needed, and the treatment process is easy to implement.

The utility model discloses a rotary joint piston for a hot die forging clutch, which belongs to the technical field of rotary joints, comprises a piston body, sealing grooves which are symmetrically distributed are arranged on the outer circle of the piston body, and is characterized in that an annular oil sealing groove is arranged at the position of an inner hole of the piston body corresponding to the sealing groove; the coaxiality of an inner hole and an outer circle of the piston body is 0.04 mm; the piston body is made of tin bronze. Compared with the prior art, the rotary joint does not need to be imported, the maintenance period and the maintenance cost of the hot die forging clutch are reduced, the cost is reduced, and the sealing performance of the rotary joint of the hot die forging clutch is effectively improved.

The invention discloses a target material visual mounting structure developed based on desktop type cluster equipment. The target material visual mounting structure comprises a driving structure, a moving plate, a tin bronze sleeve, a cathode, a screw rod and a fixing device, the fixing device comprises a bottom plate, a sputtering cathode flange, a first importer guide pillar, a second importer guide pillar and a top plate; a sputtering cathode flange is arranged on the bottom plate; the first importer guide post, the second importer guide post and a screw rod are arranged between the sputtering cathode flange and the top plate; the top plate is provided with a driving structure; the movable plate penetrates through the first importer guide column, the second importer guide column and the screw rod, the screw rod is in threaded connection with the movable plate, the screw rod is connected with the driving structure, the tin bronze sleeve is fixedly connected with the movable plate, and the lower end of the tin bronze sleeve sequentially penetrates through the sputtering cathode flange and the bottom plate and is connected with the cathode. The driving mechanism drives the screw rod to drive the tin bronze sleeve and the cathode to move up and down, so that the up-down moving distance of the target material can be accurately adjusted, and the precision and stability of each adjustment are ensured.

The invention provides a detachable copper embedded thread locking method for a titanium alloy shaft sleeve and a steel threaded shaft, and belongs to the field of metal processing methods. The problems that in an existing jackscrew thread locking method, the outer surfaces of shaft parts are damaged, and the locking effect cannot meet the precise locking requirement are solved. Firstly, a threaded jackscrew made of tin bronze is screwed into a hole in the side face of a titanium alloy shaft sleeve, the bottom face of the threaded jackscrew exceeds the inner diameter face of the shaft sleeve, then a shaft sleeve and the bottom face of the jackscrew are screwed, then a steel threaded shaft is screwed into a designated position, the jackscrew is locked with the locking force of 20-40 N.m through a wrench, and when the threaded shaft is screwed out, the jackscrew needs to be unscrewed firstly. By means of elastic deformation of the bottom threads of the tin bronze thread jackscrew, the tin bronze thread jackscrew is attached to the steel threaded shaft during locking, looseness is avoided, and the threads of the jackscrew can be recovered after the thread shaft is screwed out. The thread fastening force is effectively improved, the outer surface of the shaft part does not need to be damaged, repeated use can be achieved, and remarkable advantages are achieved in the aspects of improving connection reliability and reducing cost.

The invention relates to the technical field of tin content detection, and particularly discloses a method for detecting the tin content in tin bronze electroplating liquid. The method comprises the following steps: accurately preparing a tin standard working solution with the concentration of 20-200mg / L according to gradient, detecting the tin standard working solution with each concentration through an atomic absorption spectrometer, determining the absorbance, and establishing a concentration-absorbance standard curve of the tin standard working solution; the method comprises the following steps: treating a to-be-detected tin bronze electroplating solution sample, measuring the absorbance of a to-be-detected sample solution, converting the tin element concentration in the to-be-detected sample solution on the basis of an established tin standard working solution concentration-absorbance standard curve, and further calculating the mass concentration of tin in the to-be-detected sample solution. The method has high accuracy, the adding standard recovery rate is 99.0-100.3%, the precision test RSD is far less than 5%, and the precision and accuracy of the detection result are far higher than those of the traditional detection method.

The invention discloses a water tank type tool bit for a modular cylindrical wheel and a preparation method of the water tank type tool bit. The water tank type tool bit is detachably assembled on the outer surface of a cylindrical wheel base, and a plurality of water tanks are integrally formed in the machining face of the water tank type tool bit; the water tank type tool bit is prepared from, by weight, 35-45 parts of nano iron-nickel-cobalt alloy powder, 25-35 parts of iron-copper-tin alloy powder, 8-15 parts of tin bronze powder, 6-10 parts of superfine tungsten carbide powder, 3-7 parts of superfine activated zinc oxide and 3-6 parts of diamond through a continuous hot pressing sintering technology. Therefore, by using the alloy powder, the method is more suitable for a continuous hot pressing sintering process, high in sintering activity, improved in product performance and low in cost; by adding the tin bronze powder, the alloy bonding phase between the tin bronze powder and the iron-copper-tin alloy powder is higher, the fixed thickness processing effect of the product is improved, and the service life is prolonged; and by adding superfine tungsten carbide powder and superfine activated zinc oxide, the overall red hardness of the product can be improved, and the fixed-thickness large-feed fixed-thickness machining requirements of the water tank type tool bit are met.

The invention discloses a large tin bronze flange sleeve butt welding process which comprises preparation before welding and welding implementation, during preparation before welding, a K-shaped groove is formed in a weldment, the weldment is horizontally assembled, then the weldment is integrally preheated to the temperature not exceeding 400 DEG C, the argon arc welding process is met, a welding machine adopts red copper HS221 welding wires to sequentially conduct welding of a base layer, a filling layer and a covering layer, and the welding process is completed. And the interlayer temperature is controlled, it is ensured that each layer of welding bead is free of welding defects, the upper surface and the lower surface of a groove welding seam are polished after welding, PT appearance inspection and MT internal detection are conducted, and after it is determined that no welding defects exist, the groove welding seam is put into use. According to the butt welding process for the large tin bronze flange sleeve, the investment cost is low, field operation and maintenance are convenient, the welding and manufacturing time is short, and the metallurgical bonding welding layer of the welded tin bronze flange sleeve can meet the requirement for periodic use.

The invention provides a novel ball collecting net end cover, and relates to the field of ball collecting nets, the novel ball collecting net end cover comprises an end cover, a copper sleeve, a framework oil seal and an oil injection nozzle, the copper sleeve is arranged in the end cover, the framework oil seal is installed between the copper sleeve and the end cover, the head of the end cover is provided with the oil injection nozzle, and the oil injection nozzle is communicated with a cavity between the end cover and the copper sleeve. The framework oil seal is arranged to form a reliable sealing system, external impurities are prevented from entering key matching parts, the interior is kept clean, the stability and reliability of equipment operation are further guaranteed, faults caused by impurity jamming are reduced, the equipment fault rate is reduced, and the overall operation efficiency of a power plant is improved; meanwhile, the copper sleeve made of tin bronze is good in self-lubricating property, and the lubricating mode that grease is injected through the grease injection nozzle is matched, so that friction between the copper sleeve and the transmission shaft is greatly reduced, the transmission efficiency is improved, the service life of the copper sleeve and the transmission shaft is prolonged, and the jamming phenomenon caused by abrasion is prevented.

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 present invention relates to a preparation method of a copper-steel dual alloy by TIG twin-wire arc additive manufacturing, belonging to the technical field of additive manufacturing of metal materials. The method is carried out by using a TIG twin-wire additive manufacturing system and a CNC machine tool, and the steps are as follows: fixing a steel substrate in the CNC machine tool and preheating it, and depositing welding wires on the steel substrate by using the TIG twin-wire additive manufacturing system to obtain a copper-steel dual alloy in which the steel side and the copper side are connected; the steel side is obtained by layer-by-layer deposition of a low-alloy steel welding wire, and the copper side is obtained by layer-by-layer deposition of a tin bronze welding wire; in the additive manufacturing of the steel side and the copper side, the parameters required for manufacturing are set as needed. The method uses the TIG twin-wire additive manufacturing system to carry out in-situ manufacturing of the copper-steel dual alloy, and can obtain a copper-steel dual alloy material with good interfacial bonding performance. The interfacial bonding part of the copper-steel dual alloy material has good strength and excellent hardness performance, thereby improving the mechanical properties of the copper-steel dual alloy material.

The present invention belongs to the technical field of the preparation of metal laminated composites, and particularly relates to a method for preparing an aluminum-clad tin bronze / steel by differential temperature rolling, which comprises the following steps: S1, blank preparation; S2, rolling of a steel / aluminum composite plate; S3, surface treatment of the steel / aluminum composite plate; S4, rolling of a primary aluminum-clad tin bronze / steel composite plate; S5, rolling of a final-state aluminum-clad tin bronze / steel composite plate. By wrapping a thin aluminum strip on a steel plate, the present invention prevents the fresh metal on the surface of the steel plate from being oxidized due to heating, and at the same time, the plasticity of the steel plate in a high-temperature state is greatly improved, thereby reducing the deformation difference between the metal steel and copper; the introduction of the aluminum-clad layer effectively coordinates the deformation amounts of the tin bronze and the steel, making the rolling composite easier to achieve. A three-element mutual micro-scale meshing diffusion layer of steel, aluminum, and copper is formed between the component metals steel and tin bronze of the final-state aluminum-clad tin bronze / steel composite plate, and a structure in which steel-aluminum-copper and steel-copper intersect with each other is formed at the interface, improving the interface bonding performance.

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 belongs to the field of metal coatings, and particularly relates to a laser cladding copper-based self-lubricating coating applied to a wind power sliding bearing and a preparation method of the laser cladding copper-based self-lubricating coating, and coating powder comprises the following chemical components in percentage by mass: 1-10% of nickel-coated graphite and the balance of tin bronze. The invention further discloses a preparation method of the coating, and the copper-based composite coating with excellent antifriction and wear resistance is prepared by optimizing the adding amount of nickel-coated graphite and adopting a laser cladding method. Compared with an original tin bronze coating, the hardness of the copper-based self-lubricating coating prepared through the method is improved, and the antifriction performance is obviously improved on the basis that the abrasion resistance is guaranteed. In addition, the coating is good in forming, free of cracks, low in porosity and good in combination with the substrate, and the technical problem that an existing laser cladding process is applied to the copper-based / graphite self-lubricating coating is solved.

The present invention discloses a method for preparing a high-bonding-strength tin bronze coating based on a high-energy laser / supersonic particle composite. The method comprises the following steps: synchronously introducing a high-energy laser beam during the high-speed flight deposition of supersonic particles, adjusting the overlap ratio and position of the high-energy laser spot and the high-speed deposition powder spot, changing the action position of the laser and the heat distribution inside the coating during the particle deposition process; the coating prepared by this process has a good interface bonding state and exhibits different characteristics at different locations; the outer side of the coating, which is mainly subjected to particle plastic deformation, has higher dislocations and density, and has a work hardening effect, so that the deposited coating has good friction and wear resistance; the inner side of the coating, which is mainly subjected to particle recrystallization, has fewer internal grain defects and good ductility, which is conducive to improving mechanical properties; the gradient of the internal and external functions of the coating prolongs the service life of the coating.

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.

The utility model provides a self-adaptive spherical gasket for running-in before assembly of a speed reducer, the gasket is made of high-lead tin bronze materials and is spherical, a round hole is formed in the center of the gasket, and a groove for storing lubricating oil is formed in the concave surface of the gasket. Due to the fact that the self-adaptive spherical gasket used for running-in before assembly of the speed reducer is arranged, the gasket is made of tin bronze materials, when the gasket is pressed, the inner side of the gasket can extend, the gasket can be better matched with the appearance of a part, the whole contact area of the part is large, the effect of dispersing local pressure is achieved, and finally the service life of the part is prolonged.

The utility model discloses a corrosion-resistant film-coated cover plate and a display module, comprising a glass cover plate, the center of the glass cover plate is provided with a visual area, the glass cover plate is provided with non-visual areas except the visual area, and the top of the glass cover plate is provided with a film-coated protective layer; wherein the coating protection layer comprises an outer coating layer, a middle coating layer and a bottom coating layer, the middle coating layer is a tin bronze alloy coating layer, and the outer coating layer and the bottom coating layer are distributed at the top and the bottom of the tin bronze alloy coating layer to jointly form the coating protection layer. According to the corrosion-resistant film-coated cover plate and the display module provided by the utility model, the tin bronze alloy film-coated layer is designed on the surface of a conventional glass cover plate, so that the corrosion resistance and the hardness of the glass cover plate can be enhanced through the performance of the tin bronze alloy film-coated layer, and the overall durability is improved.

The invention relates to the technical field of lead-tin bronze bar processing, in particular to a preparation method of a high-strength and high-toughness lead-tin bronze bar, which comprises the following steps: heating a metal material containing lead, tin, nickel and the balance of copper to a liquid state, pouring the metal material into a water-cooling copper mold, and starting water-cooling circulation to obtain a metal material containing lead, tin, nickel and the balance of copper; the as-cast lead-tin bronze alloy is obtained; assembling the as-cast lead-tin bronze alloy in the blind hole in the red copper sheath to form a combined blank body; annealing treatment is conducted, a glass lubricant is smeared, and cubic boron nitride release agent spray is sprayed to the mold; the combined blank body is placed in a conical opening mold to be subjected to hot extrusion; and carrying out heat treatment to obtain the high-quality lead-tin bronze bar meeting the standard. According to the method, the surface cracking problem caused by contact friction between lead-tin bronze and the die can be reduced, the hot brittleness problem in the alloy hot working process is improved, the cracking problem in the extrusion deformation process is restrained, and finally the bar without crack defects in the surface and the center is obtained.