309 results about "Tribology" patented technology

The invention discloses a cylindrical roller trajectory tracking method and device, and the cylindrical roller trajectory tracking method comprises the following steps: obtaining an actual measurement displacement sequence of a key point on the end surface of a roller under a global coordinate system based on a multi-reference matching digital image correlation method; drawing a key point displacement curve about key points and time according to the actually measured displacement sequence; judging the motion state of a roller according to the shape characteristics of the key point displacement curve, dividing a smooth part in the key point displacement curve into a rolling area, and dividing a part with jumping or sharp points into a sliding area; calculating the actual revolution angular velocity and the actual rotation angular velocity of the roller based on the actually measured displacement sequence corresponding to the sliding area; according to the method and the device, the image matching precision can be improved, meanwhile, the rolling and sliding components of the roller are accurately distinguished, the precision of the track of the cylindrical roller is improved, and high-precision and visual experimental data are provided for existing dynamics and tribology models.

When a sliding main bearing of a wind driven generator is under a heavy-load working condition, a lubricating oil film in a starting stage is not enough to form a complete fluid lubricating film, namely, a friction surface forms a boundary lubrication state, and friction in the stage seriously affects the service life of the bearing. In this way, a macroscopic model and a microscopic model are coupled, and a multi-scale model is verified through experiments. The macroscopic model is established based on an actual structure of a wind power main shaft sliding bearing, and is equivalent to a three-layer structure of a rigid bearing base, an elastic surface supporting layer and a main shaft; a three-layer microcosmic molecular model representing'main shaft-lubricating oil-elastic supporting layer 'is established by the microcosmic model facing the boundary lubrication state of a friction pair. Wherein the thickness of the supporting layer is changed by the macroscopic model, the components of the supporting layer material are changed by the microscopic model, the friction coefficient of the tribological interface under different supporting layer thicknesses and material components is analyzed through the macro-micro cross-scale analysis model, and the optimal thickness and the optimal material component proportion suitable for the service condition of the wind power main shaft sliding bearing are obtained.

The invention relates to the field of design and preparation of powder metallurgy friction materials, in particular to a copper-based powder metallurgy friction material and a preparation method thereof. Raw materials used in the method comprise, by mass, 45%-55% of copper powder, 8%-20% of iron powder, 6%-15% of ferrochromium, 16%-22% of graphite, 0.5%-4% of molybdenum disulfide, 0.5%-4% of tin sulfide and 0.5%-4% of nickel-coated tungsten disulfide, and the mass ratio of the tin sulfide to the nickel-coated tungsten disulfide is (1-2): (1-2). In the nickel-coated tungsten disulfide, the content of nickel is 5-40%; the sum of the total amount of molybdenum disulfide, nickel-coated tungsten disulfide and tin sulfide is less than or equal to 5%. The preparation method comprises the following steps: weighing raw material powder according to the designed components, mixing, pressing and sintering to obtain the product. The composition design has the characteristics of scientificity, simple and controllable process and the like, and the obtained product has excellent tribological performance and completely meets the friction braking requirement of high-speed heavy-load equipment of 400km / h and above.

The invention discloses an asphalt pavement anti-slide performance index analysis method based on a multivariate quadratic polynomial. The method comprises the following steps: S1, extracting a pavement macroscopic texture average structure depth of a three-dimensional texture morphology rough characteristic; s2, extracting a contour single-peak average interval and a contour root-mean-square wavelength of the three-dimensional texture morphology rough characteristic; s3, extracting shape indexes of three-dimensional texture morphology roughness characteristics, wherein the shape indexes include contour skewness, hump degree, apparent anisotropy and three-dimensional morphology fractal dimension; s4, establishing a multivariate quadratic polynomial to solve a BPN regression model; and S5, establishing a multivariate quadratic polynomial to solve an SFC regression model. According to the method, the relationship between the texture roughness characteristic index and the pavement skid resistance is discussed from two perspectives of theoretical analysis and empirical regression by adopting a tribology theory and a multiple regression analysis method. A system for evaluating the skid resistance of the pavement based on the texture roughness characteristic is further established, and a new method and thought are provided for evaluating the skid resistance of the asphalt pavement.

The invention discloses a high-temperature and high-pressure fluid lubrication rotating plane frictional wear testing device, and belongs to the technical field of extreme working condition tribology testing. The device is characterized in that a lifting device and a loading cylinder are simultaneously fixed at the top of a test stand bracket, a piston rod of the loading cylinder is connected with a tension sensor and a water-cooling loading shaft, and the water-cooling loading shaft is connected with a lower sample piece (static ring) in a high-temperature and high-pressure test cavity through a spherical universal joint; the oil-cooling main shaft is fixedly connected with an upper sample piece (moving ring) in the high-temperature and high-pressure test cavity through a locking nut, so that the axial load of the water-cooling loading shaft and the oil-cooling main shaft in a non-concentric state can be uniformly loaded, and the end surfaces of the upper sample piece and the lower sample piece can be automatically attached to each other. The upper part of the high-temperature and high-pressure test cavity is connected with the water-cooling jacket, and the lower part is connected with the bearing cavity. High pressure of the test chamber is guaranteed by a high-pressure water station system, and high temperature is adjusted and controlled by an electric heater and a water cooling jacket. The device can realize the rotary sliding friction wear test of a friction pair in a high-temperature and high-pressure water environment.

The present invention relates to the technical field of wheel-rail tribology. Specifically disclosed is a wheel-rail material rolling contact fatigue damage prediction method based on different evaluation indices. The method comprises the following steps: on the basis of a wheel-rail shakedown map, carrying out wheel-rail rolling contact fatigue simulation tests, so as to obtain damage states and shakedown limit curve equations of wheel / rail materials with different shear yield strengths under different contact parameters; on the basis of a rough set theory, calculating the importance and relative weights of different evaluation indices; establishing a comprehensive evaluation index cloud model, respectively calculating comprehensive certainty degrees of an index attribute value to be evaluated belonging to different damage states, and using a maximum-value rule for the comprehensive certainty degrees to evaluate and predict rolling contact fatigue damage states; and using comprehensive evaluation index attribute values to perform validation, so as to finally determine a prediction result of a selected wheel-rail material rolling contact fatigue damage state under a condition to be subjected to prediction. The method in the present invention only depends on existing engineering data, such that the subjectivity of a damage state prediction process can be greatly reduced.

The invention relates to the field of solid lubricating materials of aerospace materials, and particularly discloses a self-adaptive molybdenum disulfide-based multi-layer composite film resistant to low orbit space irradiation and a preparation method of the self-adaptive molybdenum disulfide-based multi-layer composite film. The closed field unbalanced magnetron sputtering technology is adopted, and a bonding layer (Ti), a gradient transition layer (MoS2 / Ti), a functional layer (MoS2 / Ti), a transition layer (MoS2-Ti-C) and a functional layer (MoS2-C) are deposited on a metal material to form the multi-layer composite lubricating film. The prepared lubricating film can reliably serve in a low-orbit space environment, can effectively reduce mechanical abrasion of space mechanical friction moving parts, and can still keep stable tribological performance under long-time irradiation in the low-orbit space. The method is particularly suitable for long-term moving parts such as bearings and gears of new-generation low-orbit service spacecrafts.

The invention relates to a preparation process optimization method of a zirconium alloy material with high fretting wear resistance, which comprises the following steps: setting a chemical component optimization range of a zirconium alloy, including specific proportions of tin, iron, niobium, chromium and oxygen elements; establishing a computer simulation model, and predicting the wear volume, tribological stability and microstructure evolution of the material under the fretting wear condition; then, a complete optimization scheme is output based on the model optimization homogenization treatment temperature interval, the hot working deformation range, the cold working cumulative deformation degree and the annealing system; and finally, a preparation process sequence including smelting, homogenization treatment, hot working deformation, cold working deformation and final heat treatment is implemented, the zirconium alloy material with the equiaxed grain structure is prepared, and the wear resistance of the zirconium alloy material is verified through an experimental fretting wear performance test. Compared with the prior art, the method has the advantages that through systematic component design and process parameter simulation optimization, the material performance is remarkably improved, and the application reliability is enhanced.

An apparatus, system and method for use in performing tribo-dynamic measurements is disclosed. In certain examples, there is provided an apparatus comprising: coupling means configured to selectively releasably couple a prime mover to a rotatable structure of a tribological testing apparatus for performing a tribo-dynamic measurement on a test component; wherein the coupling means is configurable in each of: a coupled state in which the rotatable structure is engaged with the prime mover to enable rotation of the rotatable structure to be driven via the prime mover, and a de-coupled state in which the rotatable structure is disengaged from the prime mover to enable the rotatable structure to rotate independently of the prime mover.

The invention discloses a preparation method of an enhanced high-entropy alloy laser cladding coating based on carbide and rare earth oxide. The preparation method is specifically implemented according to the following steps: step 1, designing a laser cladding scheme; step 2, determining laser process parameters; step 3, preparing a cladding layer; and 4, testing the performance of the cladding layer. The mechanical property and the tribological property of the cladding layer are improved, the service life of the gear is prolonged, and the reliability and the safety of equipment are improved.

The invention discloses a strong-combination wide-temperature-range wear-resistant composite coating, and relates to the technical field of solid lubricating materials, the composite coating comprises a transition layer, a functional inner layer, a diffusion barrier layer and a functional outer layer which are sequentially formed on the surface of a matrix, the transition layer is a Mo layer and a Mo2N layer, the functional inner layer is a MoAgN layer, the diffusion barrier layer is a Mo2N layer, the functional outer layer is a MoAgN layer, and the functional inner layer is a MoAgN layer. The functional outer layer is a MoAgN layer, and the MoAgN layer comprises a Mo2N phase and an Ag phase. The invention further discloses a preparation method of the composite coating and application of the composite coating in the field of solid lubrication protection. The composite coating is good in film-substrate binding force and low in friction coefficient and wear rate in a wide temperature range, damage to key mechanical parts in the air foil bearing caused by high-temperature lubrication failure can be avoided, and the tribological performance of the bearing parts under the working condition of the wide temperature range is improved.

The invention discloses a broken tooth repairing method based on a laser cladding technology. The broken tooth repairing method is specifically implemented according to the following steps that 1, the profile of a broken tooth surface is obtained; 2, broken tooth repairing preparation; 3, repairing the section; and 4, heat treatment and performance optimization. The broken gear can be efficiently repaired, the mechanical property and the tribological property of the broken gear can be improved, and the service life of the gear is prolonged.

The invention discloses a non-contact ice friction coefficient measuring method and device, and relates to the tribology testing technology, and the method comprises the following steps: obtaining a motion image of a slide block on an artificial ice rink by using a camera system; performing preprocessing and target detection on the acquired image to obtain coordinate information of the sliding block in a world coordinate system; and based on the coordinate data of the sliding block, fitting and solving the acceleration of the sliding block by adopting primary function expansion in combination with a Tikhonov regularization method, and carrying out inversion in combination with a friction mechanical model and a kinematic model to obtain an ice friction coefficient. Compared with a traditional contact type method, the in-situ high-precision measurement of the ice friction coefficient can be realized under the condition of no sensor attachment or external force interference, the defects of low measurement precision and strong invasiveness in the prior art are effectively overcome, and the method can be applied to the fields of winter road safety detection and ice and snow sports.

The invention provides a high-entropy ceramic nano composite structure coating as well as a preparation method and application thereof, and belongs to the technical field of hard protective coatings. The high-entropy ceramic nano-composite structure coating provided by the invention comprises a plurality of structural units which are laminated on the surface of a substrate, wherein each structural unit comprises a template layer and a modulation layer arranged on the upper surface of the template layer; the template layer is in contact with the substrate; the template layer is made of a nitrogen-doped TiAlCrZrWV alloy material, and the modulation layer is made of a nitrogen-doped carbon material. According to the high-entropy ceramic nano-composite structure coating and the preparation method thereof, the template layer is high in hardness and elasticity modulus, the modulation layer has good tribological performance, when the modulation layer is inserted into the middle of the template layer, on one hand, improvement of friction performance is promoted, on the other hand, the toughness and hardness of the high-entropy ceramic nano-composite structure coating are improved, and balance between the brittleness and abrasion resistance of the coating is achieved.

The invention relates to the technical field of metal material strengthening treatment, in particular to a micropitting-resistant wind driven generator gear carburizing and quenching composite strengthening process which comprises the following steps: S1, gear blank pretreatment and surface activation; s2, gradient carburizing strengthening treatment; s3, grain refinement annealing treatment; s4, step quenching strengthening treatment; s5, performing deep cooling and thermal cycle treatment; s6, directional tempering regulation and control treatment; s7, composite shot peening strengthening treatment is conducted; and S8, an antifriction composite film layer is deposited on the surface of the gear subjected to shot peening strengthening in the S7. According to the method, through a synergistic strengthening mechanism of gradient carburization, step quenching, structure regulation and control and surface functionalization, the residual stress distribution and tribological performance are optimized while the high surface hardness of the gear is kept, and the technical problems that in a traditional technology, the carburized layer is concentrated in stress, uneven in structure, single in surface performance and the like are solved.

An apparatus, system, method and computer program for controlling an application of a radial impact 301sc on a rotatable structure 301 of a tribological testing apparatus 300 for performing a tribo-dynamic measurement on a test component 401, wherein the application of the radial impact is controlled based, at least in part, on information indicative of a position of at least a part of the rotatable structure.

The invention relates to the technical field of low-temperature tribology and test instruments, and discloses a low-temperature tribology test board and test method for a radial rolling bearing under liquid nitrogen soaking, the test board comprises a driving system, the driving system is composed of a motor, an electric box, a front cover box, a coupler and a main shaft, the motor is provided with an output shaft, and the output shaft is connected with the main shaft through the coupler; the main shaft is provided with a tested radial rolling bearing. The liquid nitrogen circulating system comprises a self-pressurization liquid nitrogen tank, a liquid nitrogen controller, a liquid nitrogen input pipeline, a liquid nitrogen output pipeline, a sealing bearing seat and a sealing assembly. According to the low-temperature tribological test bench and test method for the radial rolling bearing under liquid nitrogen soaking, the bearing can be effectively and uniformly covered by using a liquid nitrogen circulating system, the extremely low temperature is always kept during testing, the tribological performance of the bearing in an extremely low temperature environment is truly reproduced, and an external force in a complex direction can be applied to the bearing, so that the test efficiency is improved. And the real working condition in use in a low-temperature environment is simulated during testing.

The invention discloses a construction method of an external electric field relaxation optimization model based on molecular dynamics simulation, and belongs to the crossing field of computer-aided calculation and modeling, tribology and material science. The method comprises the following steps: determining the category and hierarchical structure of a friction model according to the friction force behavior of a to-be-researched object; establishing a friction model based on the category and hierarchical structure of the friction model; and determining relaxation optimization parameters of the friction model under an external electric field in molecular dynamics simulation, and performing relaxation optimization to obtain a relaxation optimization model. According to the method, the regulation and control mechanism of the electric field on the performance of the friction pair material can be comprehensively and truly simulated, and a model basis is provided for optimal design of the friction material.

The invention discloses a wear-resistant diamond-like carbon composite film on the surface of a rubber material and a preparation method and application of the wear-resistant diamond-like carbon composite film. The abrasion-resistant diamond-like carbon composite film sequentially comprises a Ti transition layer and a DLC functional layer. Wherein the Ti transition layer is sputtered and deposited on the surface of a rubber material through a direct-current magnetic control power supply, so that the bonding strength of the film can be greatly improved; the DLC functional layer is deposited on the Ti transition layer, and the structure of the DLC functional layer can be flexibly regulated and controlled by adjusting on and off of a Ti target power supply, so that the tribological performance and the environmental adaptability of the composite film are optimized. The abrasion-resistant diamond-like composite film has the advantages of being high in bonding strength, low in friction coefficient, high in environmental adaptability and the like, can be used for surface strengthening and service life prolonging of rubber sealing materials in the marine environment, and is suitable for large-scale industrial production.

The invention discloses a preparation method of a positive friction layer of a nano generator. Comprising the following steps: pouring a fluorocarbon coating into three-dimensional layered porous graphene and a fluorocarbon diluent to prepare a mixed solution with different graphene mass fractions, carrying out magnetic stirring and ultrasonic treatment on the mixed solution, then pouring the mixed solution into a planetary ball milling tank for grinding, adding a fluorocarbon curing agent, and carrying out magnetic stirring and ultrasonic treatment on the treated mixed solution again, and finally performing vacuum drying to obtain a composite material, preparing a positive friction layer, and coating the composite material. The positive friction layer adopts a 3D HPG-FEVE composite material as the friction layer, in the aspect of electrical properties, due to steric hindrance formed by fluorocarbon molecules among graphene, dielectric loss is reduced, and the electrical output performance is improved; due to the fact that a composite material prepared from 3D HPG and FEVE has a layered lubricating effect on the wear resistance, the interlayer interaction is weak, the chemical stability is good, a continuous chemical protection film can be formed in the friction process, and the tribological performance of the positive friction layer is excellent.

The invention discloses an ultrasonic abrasive flow surface texture machining device and method based on an auxiliary magnetic field, and belongs to the field of precision machining and surface engineering. The ultrasonic abrasive flow surface texture machining device comprises a workbench, an ultrasonic vibration generating device, a magnetic field generating device, an abrasive flow machining system and a three-dimensional motion platform. The composite abrasive particle suspension is composed of a basic solution, carbonyl iron powder magnetic particles and silicon carbide abrasive particles. According to the method, magnetic particles are guided by a magnetic field to form a chain along magnetic lines of force, ultrasonic high-frequency impact is combined, abrasive materials are driven to impact the surface of a workpiece in order, a submicron texture with the consistent direction and the uniform size is formed, the depth ranges from 0.2 micrometer to 2 micrometers, and the width ranges from 1 micrometer to 20 micrometers. Texture parameters are flexibly regulated and controlled through magnetic field and ultrasonic parameters, and the method has the advantages of being high in machining precision, high in controllability, low in cost, environmentally friendly and recyclable, is suitable for precise parts of bearings and cutters, and can remarkably improve the tribological performance and wettability of the parts.

The invention relates to the technical field of rolling bearing tribological performance measurement, in particular to a rolling bearing high-speed transient friction torque measuring device and method. The measuring device comprises a rack, and two bearings to be measured are installed on the rack. The tested bearings are connected through a transmission shaft, one end of the transmission shaft is connected with a servo power system, and a speed sensor is arranged on the transmission shaft; after a shaft system composed of the two tested bearings is accelerated to a certain speed, a clutch is disconnected, the shaft system is in an angular velocity free attenuation state, then an angular velocity change curve in the process is recorded through a speed sensor, and the transient friction torque of the tested bearings can be obtained. The problem that torque measurement cannot be carried out in an unbalanced state by a traditional measurement method is solved. According to the invention, only two tested bearings are arranged, so that errors caused by extra friction of the bearings of the torque sensor are avoided; and the precision of the adopted speed sensor is far higher than that of a torque sensor, so that the friction torque measurement precision is greatly improved.

The invention discloses a preparation method of an organic-inorganic composite microcapsule as well as an obtained product and application of the organic-inorganic composite microcapsule. The preparation method comprises the following steps: firstly, preparing a MoS2-metal composite material by adopting pulse laser irradiation, mixing the MoS2-metal composite material, PAO5 oil, polysulfone and an organic solvent to obtain an organic phase, and dissolving lauryl sodium sulfate and polyvinyl alcohol in water to obtain a water phase; and mixing the organic phase and the water phase, and obtaining the microcapsule by adopting a solvent evaporation method. The method disclosed by the invention is simple to operate and low in cost, and the obtained microcapsule can automatically store a lubricant and has excellent tribological performance in the friction process.

The invention relates to a particle-reinforced Poly Ether Ether Ketone (PEEK) matrix composite material which exhibits superior wear resistance and mechanical qualities, and its method of preparation. This composite material offers superior mechanical and tribological qualities, as well as an extended service life, in comparison to PEEK-based composites utilized in the contemporary medical and aviation industries.

The invention belongs to the technical field of high-entropy ceramic materials, and particularly relates to a high-entropy boride ceramic material and a preparation method and application thereof. The invention provides a preparation method of a high-entropy boride ceramic material, which comprises the following steps: mixing high-entropy boride and silicon carbide to obtain a mixed material; the high-entropy boride is (Ti < 0.2 > Zr < 0.2 > Nb < 0.2 > Mo < 0.2 > Ta < 0.2 >) B2; the silicon carbide comprises silicon carbide whiskers and / or silicon carbide particles; and sintering the mixed material to obtain the high-entropy boride ceramic material. The high-entropy boride ceramic material prepared by introducing the silicon carbide whiskers and / or the silicon carbide particles into the high-entropy boride (Ti0. 2Zr0. 2Nb0. 2Mo0. 2Ta0. 2) B2 has relatively high density, fracture toughness and bending strength, and the high-temperature tribology performance of the high-entropy boride ceramic material can be effectively improved.

The invention provides a method for improving the wear resistance of a bearing. The method mainly comprises the following steps: firstly, cleaning the bearing; fixing the bearing on a substrate table of a vacuum chamber; then forming a Cr transition layer on the surface of the bearing by adopting a direct current sputtering method; and finally, the HfO2 / WS2 composite coating is prepared on the surface of the Cr transition layer through a co-sputtering method, HfO2 is obtained through radio-frequency sputtering, and WS2 is obtained through direct-current radio-frequency sputtering. The Cr transition layer and the HfO / WS composite coating are prepared on the surface of the bearing, so that the tribological performance of the bearing under the dry running condition is remarkably improved, the abrasion degree is reduced, the service life of the bearing is prolonged, and the requirement of the modern industry for high performance of the bearing is met.

The invention relates to the field of graphene composite materials, in particular to a high-thermal-conductivity graphene composite material for a self-lubricating coating, which is prepared from the following components in percentage by mass: 45 to 55 percent of matrix material, 10 to 15 percent of graphene, 20 to 25 percent of metal sulfide, 10 to 13 percent of high-thermal-conductivity filler, 3 to 5 percent of dispersing agent and 1 to 2 percent of interface modifier, in addition, the invention further discloses a preparation method of the high-thermal-conductivity graphene composite material for the self-lubricating coating, and the preparation method comprises the steps of raw material pretreatment, premixing, multi-stage jet mill compounding, post-treatment and the like. Stable and uniform dispersion of fluorinated graphene in a system is successfully realized, the problem of stress concentration caused by agglomeration is thoroughly avoided, and the mechanical integrity of the composite material and the consistency of tribological properties are remarkably improved.

One aspect of the invention relates to a test specimen (100) for characterizing vibration damping in adhesive or sliding contact between two components subjected to vibration, low-cycle, and tribological stress, wherein the specimen is provided with male and female fasteners (130) comprising a protrusion (131) extending from a free end of a first longitudinal rod and a recess (132) recessed at a free end of a second longitudinal rod. A second aspect of the invention relates to an apparatus (300) for characterizing vibration damping in adhesive or sliding contact between two components subjected to vibration, low-cycle, and tribological stress, wherein the apparatus is provided with a test bench (300) on which the test specimen (100) is mounted, and wherein the apparatus includes a vibrator (310) for transmitting vibrational excitation to the test specimen (100) and a static loading device (320) for transmitting low-cycle stress to the test specimen. A third aspect of the invention relates to a method (400) for implementing the characterization apparatus (300).

The application belongs to the field of copper alloy friction, and particularly relates to a heterogeneous layered copper-copper zinc alloy with friction anisotropy and a preparation method thereof. The method comprises the following steps: step (1), mechanical polishing of copper plates and copper zinc alloy plates; step (2), organic oil removal; step (3), alternately stacking the copper and the copper zinc alloy, and diffusion welding to form a copper-copper zinc material blank; step (4), cold rolling of the blank at room temperature with a total deformation of 88% to 98%; and step (5), annealing of the rolled blank in an argon stream at 300 DEG C to 350 DEG C for 3 to 4 hours to obtain the copper-copper zinc alloy. The copper / copper zinc alloy with different layer spacings obtained by the application can be used to study the relationship between the layer spacing and the friction anisotropy by adjusting the layer spacing, thereby providing a criterion for designing a heterogeneous layered alloy with excellent tribological properties.

The invention belongs to the technical field of brake friction materials and powder metallurgy, and discloses a preparation and regulation method for a three-dimensional latticed structure in a copper-based brake friction material. The copper-based brake friction material is mainly composed of copper-coated iron powder, molybdenum disulfide, crystalline flake graphite, silicon dioxide, superfine copper powder and other functional components. Wherein the three-dimensional latticed structure is constructed by superfine copper powder, and the comprehensive performance of the copper-based brake friction material is improved through multiple excellent performances such as high heat conduction performance and mechanical strength of the three-dimensional latticed structure; according to the invention, structural design and preparation are carried out on raw material powder by adopting a method of prefabricated particle preparation and particle bonding and coating, so that all functional components are uniformly distributed on the friction material, a three-dimensional latticed structure can be constructed, and the mechanical property and tribological property of the friction material are greatly improved; the copper-based brake friction material is high in mechanical performance, stable in friction coefficient, high in heat conduction performance, low in wear rate and excellent in performance under extreme working conditions.