A resin-based brake pad for new energy and a preparation method thereof

Abstract

The application discloses a resin-based brake pad for new energy and a preparation method thereof, and relates to the technical field of brake pads.The resin-based brake pad for new energy is prepared from the following components in parts by weight: 6-8 parts of a resin binder, 3-4 parts of a toughening modifier, 9-14 parts of a fiber reinforcing agent, 2-4 parts of a damping agent, 7-10 parts of an alkaline inorganic stabilizer, 6-8 parts of a whisker reinforcing agent, 17-22 parts of a friction modifier, 7-10 parts of a lubricant, 25-35 parts of a main filler, 1-2 parts of an anti-rust filler and 2-4 parts of an alkaline corrosion inhibitor.The resin-based brake pad for new energy has the following beneficial effects: excellent rust resistance, which can effectively solve the problems of starting jamming and separation noise caused by rust core accumulation; stable low noise performance, which can inhibit rust-induced vibration through a damping and lubricating mechanism and relieve the brake noise problem under the condition of low use of EVs; reliable friction performance, long service life and low heat decay rate.

Description

Technical Field

[0001] This invention relates to the field of brake pad technology, and in particular to a resin-based brake pad for new energy applications and its preparation method. Background Technology

[0002] With the rapid development of new energy vehicles, especially electric vehicles (EVs), electronic parking brake (EPB) systems have become standard equipment, significantly enhancing the user experience with their convenience and intelligent functions. However, the parking clamping force of EPB systems is typically as high as 12-15 kN, which is greater than that of traditional mechanical parking brakes. Furthermore, the regenerative braking mechanism of EVs drastically reduces the daily use of mechanical brakes, leading to prolonged exposure of brake discs and friction pads to humid, high-temperature, or salt spray environments, making them highly susceptible to rust and adhesion. This rust and adhesion manifests as an iron oxide layer forming between the friction pads and the brake disc surface, causing separation noise or partial caliper jamming during vehicle start-up, and even resulting in difficulty starting or safety hazards. While traditional resin-based brake pads are environmentally friendly, they lack rust-resistant mechanisms. Therefore, developing a rust-resistant, low-noise resin-based brake pad is of urgent significance for improving the reliability and sustainability of EV braking systems. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a resin-based brake pad for new energy applications and its preparation method, the specific technical solution of which is as follows:

[0004] This invention provides a resin-based brake pad for new energy applications, comprising the following components by weight:

[0005] The composition includes 6-8 parts resin binder, 3-4 parts toughening modifier, 9-14 parts fiber reinforcing agent, 2-4 parts vibration damping agent, 7-10 parts alkaline inorganic stabilizer, 6-8 parts whisker reinforcing agent, 17-22 parts friction modifier, 7-10 parts lubricant, 25-35 parts main filler, 1-2 parts rust-preventive filler, and 2-4 parts alkaline corrosion inhibitor.

[0006] Preferably:

[0007] The resin binder includes phenolic resin;

[0008] The toughening modifier includes nitrile rubber;

[0009] The fiber reinforcing agent includes aramid pulp, polyacrylonitrile, and inorganic reinforcing fibers;

[0010] The damping agent includes vermiculite;

[0011] The alkaline inorganic stabilizer includes magnesium oxide;

[0012] The whisker reinforcing agent includes calcium sulfate whiskers;

[0013] The friction modifier includes neutral friction powder, antimony sulfide, and zirconium silicate.

[0014] The lubricant includes artificial graphite;

[0015] The main packing material includes precipitated barium sulfate;

[0016] The rust-preventive filler is selected from zinc powder or zinc alloy sacrificial particles;

[0017] The alkaline corrosion inhibitor includes calcium hydroxide and calcium oxide.

[0018] The inorganic reinforcing fiber is selected from copper fiber or ceramic fiber, and the zinc alloy sacrificial particle includes a zinc-aluminum alloy matrix and microalloying elements, wherein the microalloying elements are selected from at least one of In, Mg and Si.

[0019] Preferably:

[0020] The polymerization rate of the phenolic resin is 60~90s;

[0021] The inorganic reinforcing fiber is selected from copper fiber, wherein the copper content is ≥99% and the fiber length is 3~5mm;

[0022] The vermiculite has an impurity content of ≤5%, and the neutral friction powder has a pH value of 6.5~7.5;

[0023] The artificial graphite has a fixed carbon content of ≥98%.

[0024] Preferably, the resin-based brake pads for new energy applications are specifically made from the following components in parts by weight: 6-8 parts phenolic resin, 3-4 parts nitrile rubber, 1-2 parts aramid pulp, 1-2 parts polyacrylonitrile, 7-10 parts copper fiber or ceramic fiber, 2-4 parts vermiculite, 7-10 parts magnesium oxide, 3-4 parts neutral friction powder, 6-8 parts calcium sulfate whiskers, 11-13 parts zirconium silicate, 7-10 parts artificial graphite, 3-5 parts antimony sulfide, 25-35 parts precipitated barium sulfate, 1-2 parts zinc powder or zinc alloy sacrificial particles, 1-2 parts calcium hydroxide, and 1-2 parts calcium oxide.

[0025] The present invention also provides a preparation method for preparing resin-based brake pads for new energy applications as described in any one of the above claims, the preparation method comprising the following steps:

[0026] S1. Weigh the resin binder, toughening modifier, fiber reinforcing agent, vibration damping agent, alkaline inorganic stabilizer, whisker reinforcing agent, friction modifier, lubricant, main filler, rust-inhibiting filler and alkaline corrosion inhibitor according to the weight parts, and add them to the mixer in sequence for 10-15 min.

[0027] S2. Place the mixture obtained in step S1 into a mold and hot-press it under a pressing pressure of 250~300 kgf / cm². 2 Hot pressing temperature 150~160℃, holding pressure 5~15 s, venting 5~10 s, venting 4~6 times, vulcanization holding pressure time 180~240 s;

[0028] S3. The hot-pressed body obtained in step S2 is heated from room temperature to 170~190°C within 3 hours, then heated to 200~230°C within 1 hour, held at that temperature for 2.5~3.5 hours, and then cooled to room temperature with the heating container.

[0029] S4. The heat-treated body obtained in step S3 is subjected to machining, including surface grinding and grooving.

[0030] Preferably, the rust-preventive filler is selected from zinc alloy sacrificial particles. Before step S1, the following steps are also included: placing the zinc alloy sacrificial particles in a mixed solution of inhibitor and interface additive, immersing them at room temperature for 1-2 hours, and then drying them at 60-80°C. The inhibitor is selected from zinc phosphate, and the interface additive is selected from at least one of silane coupling agent and pyrrolidone derivative. The solvent of the mixed solution is ethanol or water.

[0031] Preferably, the zinc alloy sacrificial particles are Al-Zn-In / Mg / Si microalloyed particles, which are prepared by the following steps:

[0032] Aluminum, zinc, indium, magnesium and silicon are melt-alloyed in a mass ratio of (70~85):(10~20):(0.1~0.5):(1~5):(0.5~2) at a melting temperature of 650~700℃, and then cast into ingots after being stirred evenly.

[0033] The alloy ingot is subjected to solution heat treatment at 500~510℃ for 2~4 h, and then quenched to room temperature to obtain the alloy ingot.

[0034] The alloy ingot is obtained by crushing it into particles with a diameter of 1~10 μm.

[0035] Preferably, the inorganic reinforcing fiber is selected from ceramic fiber, the ceramic fiber is SiC long / short fiber, the SiC long fiber has a length of 3~5 mm, and the SiC short fiber has a length of 0.1~1.0 mm.

[0036] Preferably:

[0037] The lubricant also includes h-BN, which is added at 10% to 20% of the total mass of the lubricant. The friction modifier also includes an Al2O3 / SiO2 mixture, which is added at 10% to 20% of the total mass of the friction modifier. The mass ratio of Al2O3 to SiO2 in the Al2O3 / SiO2 mixture is (1 to 2):1.

[0038] Before step S1, the following steps are also included: immersing SiC long / short fibers in a silane coupling agent ethanol solution, letting them stand at room temperature for 1-2 h, and then drying them at 80-90°C; placing the pretreated SiC long / short fibers in a CVD or electrochemical deposition apparatus, depositing a Cu thin layer at 100-250°C under an Ar / N2 atmosphere, the thin layer having a thickness of <50 nm, and then washing and drying them.

[0039] The mixing process in step S1 also includes ultrasonic-assisted dispersion at a frequency of 40 kHz.

[0040] Preferably, the spindle speed of the mixer is 100~150 rpm, and the speed of the flying knife is 2800~3200 rpm.

[0041] The resin-based brake pads for new energy applications provided by this invention have the following beneficial effects:

[0042] 1. Excellent corrosion resistance, effectively solving the problems of starting jamming and separation noise caused by rust accumulation.

[0043] 2. It exhibits stable low-noise performance and suppresses corrosion-induced vibration through vibration reduction and lubrication mechanisms, thus alleviating braking noise issues under low EV usage.

[0044] 3. Reliable friction performance, long expected life, and low thermal degradation rate. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0046] Figure 1 This is a physical sample of the resin-based brake pads for new energy applications provided in Embodiment 1 of the present invention;

[0047] Figure 2 This is the noise event statistics interface for real vehicle road testing of resin-based brake pads for new energy vehicles provided in Embodiment 1 of the present invention. Detailed Implementation

[0048] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0049] This embodiment provides a resin-based brake pad for new energy applications, which, by weight, comprises the following components:

[0050] The composition includes 6-8 parts resin binder, 3-4 parts toughening modifier, 9-14 parts fiber reinforcing agent, 2-4 parts vibration damping agent, 7-10 parts alkaline inorganic stabilizer, 6-8 parts whisker reinforcing agent, 17-22 parts friction modifier, 7-10 parts lubricant, 25-35 parts main filler, 1-2 parts rust-preventive filler, and 2-4 parts alkaline corrosion inhibitor.

[0051] The resin binder serves as the core, providing the strength and bonding interface for thermosetting structures; the toughening modifier improves brittleness and suppresses vibration sources through the elastic network of the rubber phase; the fiber reinforcement constructs a high-modulus skeleton, enhancing tear resistance and high-temperature stability; the vibration damping agent utilizes an expanded layered structure to fill micropores, damping the propagation of vibration waves; the alkaline inorganic stabilizer absorbs oxidation byproducts, maintaining a high pH environment to inhibit cathodic corrosion; the whisker reinforcement forms micron-sized needle-like bridges, increasing the density of the wear-resistant skeleton; the friction modifier, through the gradation of hard particles and neutral powder, forms a stable third-body transfer film, controlling the fluctuation of the friction coefficient; the lubricant generates a graphitized film at high temperatures, reducing shear stress and smoothing the interface; the main filler regulates overall density and thermal conductivity, optimizing processing fluidity; the rust-inhibiting filler, acting as a sacrificial anode, provides electrochemical protection, forming a sparingly soluble metal salt complex to block O2 / H2O diffusion; and the alkaline corrosion inhibitor further enhances OH-. - The concentration promotes the formation of a protective Fe(OH)2 film and synergistically passivates rust nuclei. These components, precisely proportioned and synergistic, form a dense composite layer during the mixing-hot pressing process: the rust-inhibiting filler preferentially corrodes at the disc / plate interface, the vibration-damping / lubricating components suppress rust-induced vibrations, and the reinforcing / regulating components maintain the coefficient of friction, thereby achieving rust inhibition, noise reduction, and long-lasting performance.

[0052] The resin-based brake pads for new energy applications provided in this embodiment have the following beneficial effects:

[0053] It has excellent corrosion resistance, effectively solving the problems of starting jamming and separation noise caused by rust accumulation.

[0054] It exhibits stable low-noise performance and suppresses corrosion-induced vibration through vibration reduction and lubrication mechanisms, thus alleviating braking noise issues under low EV usage.

[0055] It has reliable friction performance, long expected life, and low thermal degradation rate.

[0056] Furthermore:

[0057] Resin adhesives include phenolic resins.

[0058] Toughening modifiers include nitrile rubber.

[0059] Fiber reinforcing agents include aramid pulp, polyacrylonitrile, and inorganic reinforcing fibers.

[0060] Vibration damping agents include vermiculite.

[0061] Alkaline inorganic stabilizers include magnesium oxide.

[0062] Whisker enhancers include calcium sulfate whiskers.

[0063] Friction modifiers include neutral friction powder, antimony sulfide, and zirconium silicate.

[0064] Lubricants include synthetic graphite.

[0065] The main packing material consists of precipitated barium sulfate.

[0066] The rust-preventive filler is selected from zinc powder or zinc alloy sacrificial particles.

[0067] Alkaline corrosion inhibitors include calcium hydroxide and calcium oxide.

[0068] The inorganic reinforcing fiber is selected from copper fiber or ceramic fiber, and the zinc alloy sacrificial particle includes a zinc-aluminum alloy matrix and microalloying elements, wherein the microalloying elements are selected from at least one of In, Mg and Si.

[0069] In this process, phenolic resin, acting as a resin binder, provides a rapidly curing network that synergistically forms a tough-rigid balance structure with the toughening modifier of nitrile rubber, inhibiting crack propagation. Aramid sizing and polyacrylonitrile, as organic fiber reinforcing agents, improve high-temperature tear resistance, while inorganic reinforcing fibers (copper fibers or ceramic fibers) construct a thermally conductive / mechanical skeleton. Copper fibers provide high thermal conductivity and friction-enhancing effects, while ceramic fibers ensure low-density wear resistance. Vermiculite, as a vibration damping agent, fills interfacial gaps through layered expansion, damping vibrations. Magnesium oxide, as an alkaline inorganic stabilizer, absorbs corrosive media such as sulfur oxides, maintaining pH stability. Calcium sulfate whiskers enhance the micro-bridging strength. Neutral friction powder, antimony sulfide, and zirconium silicate, as friction modifiers, form a hard transfer film. The friction coefficient is controlled; artificial graphite lubrication generates a graphene layer at high temperatures, reducing interfacial shear; precipitated barium sulfate serves as the main filler, optimizing density and thermal conductivity; zinc powder, the rust-preventive filler, forms insoluble zinc salts and zinc complexes on the surface of the friction material through the cathodic electrochemical protection effect generated by zinc ionization, thereby inhibiting the oxidation and corrosion of iron-based brake disc materials and playing a role in inhibiting the corrosion of brake pads and friction materials; zinc alloy sacrificial particles, the rust-preventive filler, form a preferred electrochemical gradient through the zinc-aluminum alloy matrix (Al-Zn-In / Mg / Si microalloying elements), and In / Mg / Si refines the grains, improving the high-temperature life of the sacrificial anode and preferentially corroding and blocking the diffusion of rust nuclei; calcium hydroxide and calcium oxide, as alkaline corrosion inhibitors, increase the OH... - The concentration promotes the formation of the Fe(OH)2 passivation film. After hot pressing, these specific components form a gradient composite layer: organic / inorganic fibers provide synergistic reinforcement, zinc / zinc alloy + alkaline agent provides multi-layer rust prevention, and friction / lubrication components stabilize the interface, thereby achieving rust inhibition, noise damping, and long-lasting performance.

[0070] Furthermore:

[0071] The polymerization rate of phenolic resin is 60~90s.

[0072] The inorganic reinforcing fiber is selected from copper fiber, with a copper content of ≥99% and a fiber length of 3~5mm.

[0073] The impurity content of vermiculite is ≤5%, and the pH value of the neutral friction powder is 6.5~7.5.

[0074] The fixed carbon content of artificial graphite is ≥98%.

[0075] The phenolic resin polymerization rate of 60-90s controls the crosslinking rate, avoiding excessively fast polymerization leading to brittleness or excessively slow polymerization causing poor flowability, thus forming a uniform resin network. The inorganic reinforcing fiber is selected from copper fiber, with high-purity copper ensuring thermal conductivity and mechanical anchoring, and long fiber bridging interfaces reducing stress concentration. The low impurity content of vermiculite ensures a pure expansion layer, efficiently filling micropores and damping high-frequency vibrations. The neutral friction powder with a pH of 6.5-7.5 makes the overall material slightly alkaline, inhibiting cathodic corrosion and optimizing porosity, improving noise and compression performance. The artificial graphite with a fixed carbon content of ≥98% provides a high-purity lubricating phase, which rapidly forms a transfer film at high temperatures, reducing fluctuations in the coefficient of friction.

[0076] Furthermore, the resin-based brake pads for new energy applications are specifically made from the following components in parts by weight: 6-8 parts phenolic resin, 3-4 parts nitrile rubber, 1-2 parts aramid pulp, 1-2 parts polyacrylonitrile, 7-10 parts copper fiber or ceramic fiber, 2-4 parts vermiculite, 7-10 parts magnesium oxide, 3-4 parts neutral friction powder, 6-8 parts calcium sulfate whiskers, 11-13 parts zirconium silicate, 7-10 parts artificial graphite, 3-5 parts antimony sulfide, 25-35 parts precipitated barium sulfate, 1-2 parts zinc powder or zinc alloy sacrificial particles, 1-2 parts calcium hydroxide, and 1-2 parts calcium oxide.

[0077] This embodiment also provides a preparation method for preparing resin-based brake pads for new energy applications as described in any of the above embodiments. The preparation method includes the following steps:

[0078] S1. Weigh the resin binder, toughening modifier, fiber reinforcing agent, vibration damping agent, alkaline inorganic stabilizer, whisker reinforcing agent, friction modifier, lubricant, main filler, rust-inhibiting filler and alkaline corrosion inhibitor according to the weight parts, and add them to the mixer in sequence for 10~15 min.

[0079] S2. Place the mixture obtained in step S1 into a mold and hot-press it under a pressing pressure of 250~300 kgf / cm². 2 The hot pressing temperature is 150~160℃, the pressure holding time is 5~15 s, the venting time is 5~10 s, the venting time is 4~6 times, and the vulcanization pressure holding time is 180~240 s.

[0080] S3. The hot-pressed body obtained in step S2 is heated from room temperature to 170~190°C within 3 hours, then heated to 200~230°C within 1 hour, held at that temperature for 2.5~3.5 hours, and then cooled to room temperature with the heating container.

[0081] S4. The heat-treated body obtained in step S3 is machined, including surface grinding and grooving.

[0082] In step S1, the components are added sequentially according to their weight parts, and the mixture is stirred for 10-15 minutes to promote compatibility and prevent fiber agglomeration from inducing rust nuclei. In step S2, the gas is hot-pressed and extruded to form a low-porosity composite layer, and the zinc anti-rust filler is locally enriched at the interface to provide sacrificial protection. In step S3, the progressive heat treatment controls the phenolic curing rate, releases residual stress, stabilizes the alkaline pH, and promotes the formation of a passivation film. In step S4, the surface roughness is optimized by machining to enhance the adhesion of the lubrication transfer film.

[0083] Furthermore, the rust-preventive filler is selected from zinc alloy sacrificial particles, and the following steps are included before step S1: the zinc alloy sacrificial particles are placed in a mixed solution of inhibitor and interface additive, immersed at room temperature for 1-2 h, and then dried at 60-80°C. The inhibitor is selected from zinc phosphate, and the interface additive is selected from at least one of silane coupling agent and pyrrolidone derivative. The solvent of the mixed solution is ethanol or water.

[0084] Zinc phosphate acts as an inhibitor, hydrolyzing on the zinc alloy surface to form a Zn3(PO4)2 passivation film, which blocks the cathodic reaction when the sacrificial protection decays. Silane coupling agent (KH-570) bridges the particle-resin / fiber interface through Si-O-Zn bonds, improving dispersibility and adhesion. Pyrrolidone derivatives enhance organic compatibility and prevent agglomeration-induced localized rust nuclei. After impregnation, the particles are uniformly embedded in the mixture, and after hot-pressing and curing, a "sacrificial + passivation" gradient layer is formed: the alloy corrodes preferentially, the inhibitor fills the gap for passivation, and the additives stabilize the interface, thereby extending the protection life and maintaining friction / noise performance.

[0085] Furthermore, the zinc alloy sacrificial particles are Al-Zn-In / Mg / Si microalloyed particles, which are prepared through the following steps:

[0086] Aluminum, zinc, indium, magnesium and silicon are melt-alloyed in a mass ratio of (70~85):(10~20):(0.1~0.5):(1~5):(0.5~2) at a melting temperature of 650~700℃, and then cast into ingots after being stirred evenly.

[0087] The alloy ingot is subjected to solution heat treatment at 500~510℃ for 2~4 h, and then quenched to room temperature to obtain the alloy ingot.

[0088] The alloy ingot is obtained by crushing it into particles with a diameter of 1~10 μm.

[0089] Among them, the smelting of multi-element alloys forms an Al-Zn solid solution, and the Mg / Si grain refinement inhibits localized corrosion pits; the solid solution heat treatment diffuses the alloy phase, improves the high temperature threshold, and the quenching fixes the β phase structure; the pulverization prepares nano-sized particles, which are embedded in the composite after impregnation to form a preferred sacrificial network: the Al-Zn matrix preferentially dissolves to protect the disk surface, and the Mg / Si phase generates a dense Zn-Mg(OH)2 film to block the diffusion of rust nuclei, which works in conjunction with subsequent processes to stabilize pH and friction interface, thereby achieving multi-level rust prevention and performance matching.

[0090] Furthermore, the inorganic reinforcing fiber is selected from ceramic fiber, which is SiC long / short fiber, with the SiC long fiber having a length of 3~5 mm and the SiC short fiber having a length of 0.1~1.0 mm.

[0091] Among them, SiC long fibers serve as the main skeleton, providing high-modulus bridging and heat-resistant skeleton; short fibers fill micro-voids, improving wear-resistant density; the long and short fiber gradation forms a network structure, uniformly anchoring the resin in the mixture, bridging the friction interface after hot pressing and curing, reducing stress concentration and rust-induced corrosion channels; in synergy with rust-preventing / vibration-damping components, the inertness of the SiC surface inhibits O2 adsorption, maintains alkaline pH, and promotes passivation.

[0092] Furthermore:

[0093] The lubricant also includes h-BN, which is added at 10% to 20% of the total mass of the lubricant. The friction modifier also includes an Al2O3 / SiO2 mixture, which is added at 10% to 20% of the total mass of the friction modifier. The mass ratio of Al2O3 to SiO2 in the Al2O3 / SiO2 mixture is (1 to 2):1.

[0094] Before step S1, the following steps are also included: immersing SiC long / short fibers in a silane coupling agent ethanol solution, letting them stand at room temperature for 1-2 h, and then drying them at 80-90℃; placing the pretreated SiC long / short fibers in a CVD or electrochemical deposition apparatus, depositing a Cu thin layer at 100-250℃ under an Ar / N2 atmosphere, with a thin layer thickness <50 nm, and then washing and drying them.

[0095] Step S1 also includes ultrasonic-assisted dispersion at a frequency of 40 kHz.

[0096] Among them, the h-BN layered structure works with graphite to form a thermal bridge, and the Al2O3 / SiO2 graded hard particles regulate the third body film; silane coupling with SiC-resin bonding, the Cu thin layer improves local thermal conductivity without corrosion; ultrasonically dispersed uniform fibers form a gradient layer after hot pressing: Cu / h-BN thermal network conduction, Al / Si frictional stability, overall suppression of rust nuclei and vibration, and excellent comprehensive performance.

[0097] Furthermore, the mixing machine spindle speed is 100~150 rpm, and the flying knife speed is 2800~3200 rpm.

[0098] Specific embodiments are provided below. These embodiments are intended to enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way.

[0099] Example 1

[0100] Weigh all substances one by one using an electronic balance. Check the state of the substances: the phenolic resin should be free of lumps, the copper fiber should be free of oxidation, and the zinc powder should be dry. Manually add the materials in the following order: first, the large particle components (2.2 kg of precipitated barium sulfate + 0.62 kg of artificial graphite + 0.29 kg of antimony sulfide + 0.255 kg of neutral friction powder + 0.87 kg of zirconium silicate), start the machine and mix for 4 min 10 s; add the medium particles (0.62 kg of magnesium oxide + 0.51 kg of calcium sulfate whiskers + 0.22 kg of vermiculite), mix for 3 min 20 s; finally, add the resin and fiber (0.51 kg of phenolic resin + 0.255 kg of nitrile rubber + 0.11 kg of aramid pulp + 0.11 kg of polyacrylonitrile + 0.62 kg of copper fiber), then add the rust inhibitor (0.11 kg of zinc powder + 0.11 kg of calcium hydroxide + 0.11 kg of calcium oxide), mix for 8 min 15 s. Pause once during the process to check the uniformity. Parameters: Spindle speed 120 r / min, cutter speed 3000 r / min, room temperature 24.5℃, humidity 48%RH. The mixture is homogeneous, with a slight copper fiber luster and no obvious agglomeration; a slight rubbery smell is detected; a small sample was taken out and visually examined and found to be free of stratification.

[0101] Divide the mixture into 15 equal portions and spread them evenly into the mold. Monitor the pressure gauge and thermometer. Pre-compress to 50 kgf / cm². 2 Expel air for 2 minutes, then pressurize to full pressure. Parameters: Pressing pressure 250 kgf / cm² 2 The hot pressing temperature was 155℃, the pressure holding time was 10s, the venting time was 5s (repeated 6 times), and the vulcanization pressure holding time was 180s. No cracking was observed.

[0102] Fifteen molded samples were evenly placed on the oven racks and heated from room temperature (24℃) to 180℃ at a rate of 1.8℃ / min for 3 hours and 10 minutes. The temperature was then increased to 200℃ at a rate of 5℃ / min for 55 minutes, and held at this temperature for 3 hours and 5 minutes (at a constant temperature of 200℃ with intermittent fan operation). The samples were then allowed to cool naturally to room temperature for approximately 2 hours and 30 minutes, with a final temperature of 23.5℃. The sample color changed from grayish-black to dark brown, with no deformation or abnormal odor.

[0103] Thickness inspected: 9.6~9.8mm, acceptable. Surface ground on both sides to 9.5mm, then grooved. Parameters: Grinding speed 480r / min, coolant flow rate 1.8L / min; grooving speed 800r / min. All wafers were grooved evenly and without burrs. 15 samples were produced. Sample production details are as follows... Figure 1 As shown.

[0104] Samples were installed on the rear wheel calipers, simulating standard cycles (cold braking, high-speed braking, first / secondary brake fade, recovery, high temperature 500℃). The coefficient of friction (μ) and wear (thickness difference) were measured. Test environment: temperature 23±2℃, humidity 50±5%RH. Tests were performed twice, and the average value was taken. Test results are shown in Table 1-1.

[0105] The test bench simulated 1000 braking cycles (speed 100 km / h, pressure 20~60 bar), recording the probability of events exceeding 70 dB(A). The probabilities were >70 / 80 / 90 / 95 / 100 dB(A). Environment: quiet chamber, <40 dB(A). Two tests were conducted, and the average value was taken. The test results are shown in Table 1-2.

[0106] Take a sample and soak the cast iron disc in a solution (5% water, 5% NaCl, or a mixture of NaCl and MgCl2 at a ratio of 92.1:7.9), apply a clamping force of 13 kN, and park for 96 hours (temperature 25℃, humidity 90%RH). Then measure the release torque (rotating disc separation force). Perform the test twice and take the average value. The test results are shown in Tables 1-3.

[0107] A 16,000km real-world road test was conducted in Huangshan under mixed road conditions, recording noise events. The test results are as follows: Figure 2 As shown.

[0108]

[0109]

[0110]

[0111] Example 2

[0112] 39g of aluminum, 7.5g of zinc, 0.15g of indium, 1.5g of magnesium, and 0.5g of silicon were added sequentially to a crucible. The melting temperature was raised to 682℃ and maintained for 30 minutes. During this period, the mixture was manually stirred every 5 minutes using a stainless steel stirring rod to ensure uniform melting. The molten alloy was then poured into a steel casting mold preheated to 200℃ and cooled into an ingot. The alloy ingot was placed in a muffle furnace and solution heat-treated at 506℃ for 3 hours and 12 minutes. It was then transferred to a room temperature water bath for quenching for about 10 minutes. The treated alloy ingot was placed in a planetary ball mill (ZrO2 grinding balls, 5mm in diameter, ball-to-material ratio 10:1) and pulverized at 300r / min for 4 hours. After sieving, zinc alloy sacrificial particles were obtained.

[0113] Weigh all materials one by one using an electronic balance. Check the state of the materials: the phenolic resin granules were free of lumps, the copper fiber surface was free of oxidation, and the zinc alloy sacrificial granules were dry and uniform in size. Manually add the materials in sequence: first, the large particle components (1.6 kg of precipitated barium sulfate + 0.45 kg of artificial graphite + 0.21 kg of antimony sulfide + 0.19 kg of neutral friction powder + 0.64 kg of zirconium silicate), start the machine and mix for 4 min 20 s; add the medium particles (0.45 kg of magnesium oxide + 0.37 kg of calcium sulfate whiskers + 0.16 kg of vermiculite), mix for 3 min 10 s; finally, add the resin and fiber (0.37 kg of phenolic resin + 0.19 kg of nitrile rubber + 0.08 kg of aramid pulp + 0.08 kg of polyacrylonitrile + 0.45 kg of copper fiber), then add the rust inhibitor (80 g of zinc alloy sacrificial granules + 80 g of calcium hydroxide + 80 g of calcium oxide), mix for 7 min 45 s. During the process, pause once to check the uniformity; there was no obvious fiber entanglement. Parameters: Spindle speed 120 r / min, cutter speed 3000 r / min, room temperature 23.8℃, humidity 52%RH. The mixture is homogeneous, with a slight copper fiber luster and no obvious agglomeration; a slight rubbery smell is detected; a small sample was taken out and visually examined to find no layering.

[0114] Divide the mixture into 11 equal portions and spread them evenly into the mold. Monitor the pressure gauge and thermometer. Pre-compress to 50 kgf / cm². 2 Expel air for 2 minutes, then pressurize to full pressure. Parameters: Pressing pressure 250 kgf / cm² 2 The hot pressing temperature is 155℃, the pressure holding time is 10s, the venting time is 5s (repeated 6 times), and the vulcanization pressure holding time is 180s. There are no cracks or bulges on the whole.

[0115] Eleven molded samples were evenly placed on the oven racks and heated from room temperature (23.2℃) to 180℃ at a rate of 1.8℃ / min for 3 hours and 10 minutes. The temperature was then increased to 200℃ at a rate of 5℃ / min for 55 minutes, and held at this temperature for 3 hours and 5 minutes (at a constant temperature of 200℃ with intermittent fan operation). The samples were then allowed to cool naturally to room temperature for approximately 2 hours and 30 minutes, with a final temperature of 23.5℃. The sample color changed from grayish-black to dark brown, with no deformation or abnormal odor.

[0116] Thickness inspected: 9.5~9.7mm, acceptable. Surface ground on both sides to 9.5mm, then grooved. Parameters: grinding speed 480r / min, coolant flow rate 1.8L / min; grooving speed 800r / min. All wafers had uniform grooving and were burr-free. 11 samples were produced.

[0117] Samples were installed on the rear wheel calipers, simulating standard cycles (cold braking, high-speed braking, first / secondary brake fade, recovery, high temperature 500℃). The coefficient of friction (μ) and wear (thickness difference) were measured. Test environment: temperature 23±2℃, humidity 50±5%RH. Tests were performed twice, and the average value was taken. The test results are shown in Table 2-1.

[0118] The test bench simulated 1000 braking cycles (speed 100 km / h, pressure 20~60 bar), recording the probability of events exceeding 70 dB(A). The probabilities were >70 / 80 / 90 / 95 / 100 dB(A). Environment: quiet chamber, <40 dB(A). Two tests were conducted, and the average value was taken. The test results are shown in Table 2-2.

[0119] Take a sample and a cast iron disc soaking solution (5% water, 5% NaCl, or a mixture of NaCl and MgCl2 at a ratio of 92.1:7.9), apply a clamping force of 13 kN, and park for 96 hours (temperature 25℃, humidity 90%RH). Then measure the release torque (rotating disc separation force). Perform the test twice and take the average value. The test results are shown in Table 2-3.

[0120]

[0121]

[0122]

[0123] Example 3

[0124] 39g of aluminum, 7.5g of zinc, 0.15g of indium, 1.5g of magnesium, and 0.5g of silicon were added sequentially to a crucible. The melting temperature was raised to 682℃ and maintained for 30 minutes. During this period, the mixture was manually stirred every 5 minutes using a stainless steel stirring rod to ensure uniform melting. The molten alloy was then poured into a steel casting mold preheated to 200℃ and cooled into an ingot. The alloy ingot was placed in a muffle furnace and solution heat-treated at 506℃ for 3 hours and 12 minutes. It was then transferred to a room temperature water bath for quenching for about 10 minutes. The treated alloy ingot was placed in a planetary ball mill (ZrO2 grinding balls, 5mm in diameter, ball-to-material ratio 10:1) and pulverized at 300r / min for 4 hours. After sieving, zinc alloy sacrificial particles were obtained. Take 80g of the above particles and place them in a 500mL glass beaker. Add a mixed solution of zinc phosphate inhibitor (5g, dissolved in 100mL ethanol) and silane coupling agent KH-570 interface aid (2g, dissolved in ethanol). The total solution volume is about 150mL. Stir magnetically at room temperature for 1h 45min and then transfer to a vacuum oven to dry at 72℃ for 2h 10min to obtain pretreated particles.

[0125] Weigh all materials one by one using an electronic balance. Check the state of the materials: the phenolic resin particles are free of lumps, the copper fiber surface is free of oxidation, and the pretreated zinc alloy sacrificial particles are uniform in size. Manually add materials in sequence: first, the large particle components (1.6 kg precipitated sodium sulfate + 0.45 kg artificial graphite + 0.21 kg antimony sulfide + 0.19 kg neutral friction powder + 0.64 kg silicate cone), start the machine and mix for 4 min 15 s; add the medium particles (0.45 kg magnesium oxide + 0.37 kg calcium sulfate whiskers + 0.16 kg vermiculite), mix for 3 min 15 s; finally, add the resin and fiber (0.37 kg phenolic resin + 0.19 kg nitrile rubber + 0.08 kg aramid pulp + 0.08 kg polyacrylonitrile + 0.45 kg copper fiber), then add the rust inhibitor (79.5 g pretreated zinc alloy sacrificial particles + 80 g calcium hydroxide + 80 g calcium oxide), mix for 7 min 50 s. The process was paused once to check uniformity; no fiber agglomeration was observed. Parameters: spindle speed 120 r / min, cutter speed 3000 r / min, room temperature 24.1℃, humidity 49%RH. The mixture was uniform, with well-dispersed particles and no stratification.

[0126] The mixture was divided into 11 equal portions and evenly spread into the mold. The pressure gauge and thermometer were monitored. Pre-compression was applied to 50 kgf / cm². 2 Expel air for 2 minutes, then pressurize to full pressure. Parameters: Pressing pressure 250 kgf / cm² 2 The hot pressing temperature is 155℃, the pressure holding time is 10s, the venting time is 5s (repeated 6 times), and the vulcanization pressure holding time is 180s. Observe the whole thing and find no cracks or bulges.

[0127] Eleven molded samples were evenly placed on the oven racks and heated from room temperature (24.3℃) to 180℃ at a rate of 1.8℃ / min for 3 hours and 10 minutes. The temperature was then increased to 200℃ at a rate of 5℃ / min for 55 minutes, and held at this temperature for 3 hours and 5 minutes (at a constant temperature of 200℃ with intermittent fan operation). The samples were then allowed to cool naturally to room temperature for approximately 2 hours and 30 minutes, with a final temperature of 23.8℃. The samples turned a uniform dark grayish-brown color, with no deformation or off-odors.

[0128] Thickness inspected: 9.5~9.8mm, acceptable. Surface ground on both sides to 9.5mm, then grooving. Parameters: grinding speed 480r / min, coolant flow rate 1.8L / min; grooving speed 800r / min. All wafers had uniform grooving and were burr-free. 11 samples were produced.

[0129] The test items and test methods are the same as in Example 2, and the test data are shown in Tables 3-1, 3-2, and 3-3.

[0130]

[0131]

[0132]

[0133] Example 4

[0134] Weigh all substances one by one using an electronic balance. Check the state of the substances: the phenolic resin granules are dry, the ceramic fibers (a mixture of long and short SiC fibers, 7:3, with long fibers approximately 4 mm in length and short fibers approximately 0.5 mm in length) have smooth surfaces, and the zinc powder is dry. Manually add the following materials in sequence: First, add the large particle components (1.6 kg precipitated barium sulfate + 0.45 kg artificial graphite + 0.21 kg antimony sulfide + 0.19 kg neutral friction powder + 0.64 kg silicate cone), start the machine and mix for 4 min 25 s; then add the medium particles (0.45 kg magnesium oxide + 0.37 kg calcium sulfate whiskers + 0.16 kg vermiculite), mix for 3 min 5 s; finally, add the resin and fiber (0.37 kg phenolic resin + 0.19 kg nitrile rubber + 0.08 kg aramid pulp + 0.08 kg polyacrylonitrile + 0.45 kg ceramic fiber), followed by the rust inhibitor (80 g zinc powder + 80 g calcium hydroxide + 80 g calcium oxide), mix for 7 min 55 s. Pause once during the process to check uniformity. Parameters: spindle speed 120 r / min, cutter speed 3000 r / min, room temperature 23.5℃, humidity 51%RH. The mixture is homogeneous and shows no stratification.

[0135] Divide the mixture into 11 equal portions and evenly spread them into the mold. Monitor the pressure gauge and thermometer. Pre-compress to 50 kgf / cm². 2 Expel air for 2 minutes, then pressurize to full pressure. Parameters: Pressing pressure 250 kgf / cm²2 The hot pressing temperature is 155℃, the pressure holding time is 10s, the venting time is 5s (repeated 6 times), and the vulcanization pressure holding time is 180s. Observe the whole thing and find no cracks or bulges.

[0136] Eleven molded samples were evenly placed on the oven racks and heated from room temperature (23.7℃) to 180℃ at a rate of 1.8℃ / min for 3 hours and 10 minutes. The temperature was then increased to 200℃ at a rate of 5℃ / min for 55 minutes, and held at this temperature for 3 hours and 5 minutes (at a constant temperature of 200℃ with intermittent fan operation). The samples were then allowed to cool naturally to room temperature for approximately 2 hours and 30 minutes, with a final temperature of 23.2℃. The samples turned a light brownish-gray color and showed no deformation or abnormal odor.

[0137] Thickness inspected at 9.6~9.8mm, acceptable. Both sides were flat-ground to 9.5mm, then grooved. Parameters: grinding speed 480r / min, coolant flow rate 1.8L / min; grooving speed 800r / min. All wafers had uniform grooving and were burr-free. 11 samples were produced.

[0138] The test items and test methods are the same as in Example 2, and the test data are shown in Tables 4-1, 4-2, and 4-3.

[0139]

[0140]

[0141]

[0142] Example 5

[0143] All substances were weighed one by one using an electronic balance. The state of the substances was checked: the phenolic resin particles were dry, the ceramic fibers (a mixture of long and short SiC fibers, 7:3, with long fibers approximately 4 mm in length and short fibers approximately 0.5 mm in length) had smooth surfaces, and the zinc powder was dry. 0.436 kg of ceramic fibers were placed in a 1 L glass beaker, and a silane coupling agent KH-570 ethanol solution (2% concentration, 500 mL volume) was added. The mixture was magnetically stirred at room temperature and allowed to stand for 1 h 30 min. Then, it was transferred to a vacuum oven and dried at 85 °C for 1 h 50 min. The pretreated fibers were placed in a CVD device (Ar / N2 atmosphere, flow rate ratio 1:1) and a Cu thin layer (approximately 35 nm thick, deposition time 25 min) was deposited at 145 °C. The fibers were then rinsed three times with deionized water and dried at 65 °C for 2 h to obtain Cu-coated fibers. Manually add the following materials in sequence: First, add the large particle components (1.54 kg of precipitated barium sulfate + 0.37 kg of artificial graphite + 0.21 kg of antimony sulfide + 0.18 kg of neutral friction powder + 0.62 kg of cone silicate + 0.15 kg of Al2O3 / SiO2 mixture, Al2O3 / SiO2 mass ratio 1.6:1), start the machine and mix for 4 min 30 s; then add the medium particles (0.44 kg of magnesium oxide + 0.36 kg of calcium sulfate whiskers + 0.15 kg of vermiculite), mix for 3 min 20 s; finally, add the resin and fiber (0.36 kg of phenolic resin + 0.18 kg of nitrile rubber + 0.077 kg of aramid pulp + 0.077 kg of polyacrylonitrile + 0.435 kg of pretreated ceramic fiber + 0.065 kg of h-BN), then add the rust inhibitor (77 g of zinc powder + 77 g of calcium hydroxide + 77 g of calcium oxide), mix for 7 min. For 40 seconds, ultrasonic-assisted dispersion was initiated (frequency 40kHz, power 200W, duration 5 minutes). The process was paused twice during this period to check uniformity. Parameters: spindle speed 120 rpm, cutter speed 3000 rpm, room temperature 24.0℃, humidity 50%RH. The mixture was homogeneous, without stratification or agglomeration.

[0144] Divide the mixture into 11 equal portions and evenly spread them into the mold. Monitor the pressure gauge and thermometer. Pre-compress to 50 kgf / cm². 2 Expel air for 2 minutes, then pressurize to full pressure. Parameters: Pressing pressure 250 kgf / cm² 2 The hot pressing temperature is 155℃, the pressure holding time is 10s, the venting time is 5s (repeated 6 times), and the vulcanization pressure holding time is 180s. Observe the whole thing and find no cracks or bulges.

[0145] Eleven molded samples were evenly placed on the oven racks and heated from room temperature (24.2℃) to 180℃ at a rate of 1.8℃ / min for 3 hours and 10 minutes. The temperature was then increased to 200℃ at a rate of 5℃ / min for 55 minutes, and held at this temperature for 3 hours and 5 minutes (at a constant temperature of 200℃ with intermittent fan operation). The samples were then allowed to cool naturally to room temperature for approximately 2 hours and 30 minutes, with a final temperature of 23.9℃. The samples turned a uniform dark gray color and showed no deformation or off-odors.

[0146] Thickness inspected at 9.6~9.8mm, acceptable. Both sides were flat-ground to 9.5mm, then grooved. Parameters: grinding speed 480r / min, coolant flow rate 1.8L / min; grooving speed 800r / min. All wafers had uniform grooving and were burr-free. 11 samples were produced.

[0147] The test items and test methods are the same as in Example 2, and the test data are shown in Tables 5-1, 5-2, and 5-3.

[0148]

[0149]

[0150]

[0151] Comparative Example

[0152] Weigh all substances one by one using an electronic balance. Check the state of the substances: the phenolic resin granules are dry and free of lumps, and the copper fiber surface is free of oxidation. Manually add the materials in sequence: first, the large particle components (1.84 kg of precipitated barium sulfate + 0.45 kg of artificial graphite + 0.21 kg of antimony sulfide + 0.19 kg of neutral friction powder + 0.64 kg of silicate), start the machine and mix for 4 min 5 s; add the medium particles (0.45 kg of magnesium oxide + 0.37 kg of calcium sulfate whiskers + 0.16 kg of vermiculite), mix for 3 min 10 s; finally, add the resin and fiber (0.37 kg of phenolic resin + 0.19 kg of nitrile rubber + 0.08 kg of aramid pulp + 0.08 kg of polyacrylonitrile + 0.45 kg of copper fiber), mix for 7 min 20 s. Pause once during the process to check the uniformity; the overall dispersion is good. Parameters: Spindle speed 120 r / min, cutter speed 3000 r / min, room temperature 23.9℃, humidity 53%RH. The mixture is homogeneous and without stratification.

[0153] Divide the mixture into 11 equal portions and evenly spread them into the mold. Monitor the pressure gauge and thermometer. Pre-compress to 50 kgf / cm². 2 Expel air for 2 minutes, then pressurize to full pressure. Parameters: Pressing pressure 250 kgf / cm² 2 The hot pressing temperature is 155℃, the pressure holding time is 10s, the venting time is 5s (repeated 6 times), and the vulcanization pressure holding time is 180s. There are no cracks or bulges on the whole.

[0154] Eleven molded specimens were placed in an oven and heated directly from room temperature (23.4℃) to 200℃ (heating rate approximately 2℃ / min, time 2 hours 20 minutes), and held at that temperature for 3 hours (constant temperature of 200℃ with continuous fan operation). They were then allowed to cool naturally to room temperature in the oven for approximately 2 hours 15 minutes, with a final temperature of 23.1℃. The sample color was light gray.

[0155] Thickness inspected: 9.5~9.8mm, acceptable. Grind both sides to 9.5mm, then grooving. Parameters: Grinding speed 480r / min, coolant flow rate 1.8L / min; grooving speed 800r / min. Grooving is uniform and burr-free. 11 samples produced.

[0156] The test items and test methods are the same as in Example 2, and the test data are shown in Tables 6-1, 6-2, and 6-3.

[0157]

[0158]

[0159]

[0160] As can be seen, the friction coefficients of Examples 1-5 fluctuate little, and the μ value is stable. The probability of noise >70dB in Examples is about 0.2-0.5%, and the probability of noise exceeding 70dB is 0%, which solves the noise hazard problem of low EV usage. The torque of the Examples is about 8.9-10.3 N·m for pure water, about 24.5-30.3 N·m for NaCl, and about 26.1-32.3 N·m for mixed salt, which is much lower than that of the comparative examples.

[0161] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be within the scope of protection of the present invention.

Claims

1. A resin-based brake pad for new energy applications, characterized in that, It is made from the following components in parts by weight: 6-8 parts resin binder, 3-4 parts toughening modifier, 9-14 parts fiber reinforcing agent, 2-4 parts vibration damping agent, 7-10 parts alkaline inorganic stabilizer, 6-8 parts whisker reinforcing agent, 17-22 parts friction modifier, 7-10 parts lubricant, 25-35 parts main filler, 1-2 parts rust-inhibiting filler, and 2-4 parts alkaline corrosion inhibitor; in, The resin binder includes phenolic resin; The toughening modifier includes nitrile rubber; The fiber reinforcing agent includes aramid pulp, polyacrylonitrile, and inorganic reinforcing fibers, wherein the inorganic reinforcing fibers are selected from copper fibers or ceramic fibers; The damping agent includes vermiculite; The alkaline inorganic stabilizer includes magnesium oxide; The whisker reinforcing agent includes calcium sulfate whiskers; The friction modifier includes neutral friction powder, antimony sulfide, and zirconium silicate. The lubricant includes artificial graphite; The main packing material includes precipitated barium sulfate; The rust-preventive filler is selected from zinc powder or zinc alloy sacrificial particles. The zinc alloy sacrificial particles include a zinc-aluminum alloy matrix and microalloying elements. The microalloying elements are selected from at least one of In, Mg and Si. The alkaline corrosion inhibitor includes calcium hydroxide and calcium oxide.

2. The resin-based brake pad for new energy applications according to claim 1, characterized in that: The polymerization rate of the phenolic resin is 60~90s; The inorganic reinforcing fiber is selected from copper fiber, wherein the copper content is ≥99% and the fiber length is 3~5mm; The vermiculite has an impurity content of ≤5%, and the neutral friction powder has a pH value of 6.5~7.5; The artificial graphite has a fixed carbon content of ≥98%.

3. The resin-based brake pad for new energy applications according to claim 1 or 2, characterized in that, The new energy resin-based brake pads are specifically made of the following components in parts by weight: 6-8 parts phenolic resin, 3-4 parts nitrile rubber, 1-2 parts aramid pulp, 1-2 parts polyacrylonitrile, 7-10 parts copper fiber or ceramic fiber, 2-4 parts vermiculite, 7-10 parts magnesium oxide, 3-4 parts neutral friction powder, 6-8 parts calcium sulfate whiskers, 11-13 parts zirconium silicate, 7-10 parts artificial graphite, 3-5 parts antimony sulfide, 25-35 parts precipitated barium sulfate, 1-2 parts zinc powder or zinc alloy sacrificial particles, 1-2 parts calcium hydroxide, and 1-2 parts calcium oxide.

4. A preparation method, characterized in that, The method for preparing resin-based brake pads for new energy applications as described in any one of claims 1 to 3 comprises the following steps: S1. Weigh the resin binder, toughening modifier, fiber reinforcing agent, vibration damping agent, alkaline inorganic stabilizer, whisker reinforcing agent, friction modifier, lubricant, main filler, rust-inhibiting filler and alkaline corrosion inhibitor according to the weight parts, and add them to the mixer in sequence for 10-15 min. S2. Place the mixture obtained in step S1 into a mold and hot-press it under a pressing pressure of 250~300 kgf / cm². 2 Hot pressing temperature 150~160℃, holding pressure 5~15 s, venting 5~10 s, venting 4~6 times, vulcanization holding pressure time 180~240 s; S3. The hot-pressed body obtained in step S2 is heated from room temperature to 170~190°C within 3 hours, then heated to 200~230°C within 1 hour, held at that temperature for 2.5~3.5 hours, and then cooled to room temperature with the heating container. S4. The heat-treated body obtained in step S3 is subjected to machining, including surface grinding and grooving.

5. The preparation method according to claim 4, characterized in that, The rust-preventive filler is selected from zinc alloy sacrificial particles. Before step S1, the following steps are also included: placing the zinc alloy sacrificial particles in a mixed solution of inhibitor and interface additive, immersing them at room temperature for 1-2 hours, and then drying them at 60-80°C. The inhibitor is selected from zinc phosphate, and the interface additive is selected from at least one of silane coupling agent and pyrrolidone derivative. The solvent of the mixed solution is ethanol or water.

6. The preparation method according to claim 5, characterized in that, The zinc alloy sacrificial particles are Al-Zn-In / Mg / Si microalloyed particles, which are prepared through the following steps: Aluminum, zinc, indium, magnesium and silicon are melt-alloyed in a mass ratio of (70~85):(10~20):(0.1~0.5):(1~5):(0.5~2) at a melting temperature of 650~700℃, and then cast into ingots after being stirred evenly. The alloy ingot is subjected to solution heat treatment at 500~510℃ for 2~4 h, and then quenched to room temperature to obtain the alloy ingot. The alloy ingot is obtained by crushing it into particles with a diameter of 1~10 μm.

7. The preparation method according to claim 4, characterized in that, The inorganic reinforcing fiber is selected from ceramic fiber, which is SiC long / short fiber. The SiC long fiber has a length of 3~5mm, and the SiC short fiber has a length of 0.1~1.0mm.

8. The preparation method according to claim 7, characterized in that: The lubricant also includes h-BN, which is added at 10% to 20% of the total mass of the lubricant. The friction modifier also includes an Al2O3 / SiO2 mixture, which is added at 10% to 20% of the total mass of the friction modifier. The mass ratio of Al2O3 to SiO2 in the Al2O3 / SiO2 mixture is (1 to 2):

1. Before step S1, the following steps are also included: immersing SiC long / short fibers in a silane coupling agent ethanol solution, allowing them to stand at room temperature for 1-2 h, and then drying them at 80-90°C; placing the pretreated SiC long / short fibers in a CVD or electrochemical deposition apparatus, depositing a Cu thin layer at 100-250°C under an Ar / N2 atmosphere, the thin layer having a thickness of <50 nm, followed by washing with water and drying; The mixing process in step S1 also includes ultrasonic-assisted dispersion at a frequency of 40 kHz.

9. The preparation method according to any one of claims 4 to 8, characterized in that, The mixing machine spindle speed is 100~150 rpm, and the flying knife speed is 2800~3200 rpm.

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