95results about "Friction lining" patented technology

A brake disc for a disc brake may have a braking band made of gray cast iron or steel, provided with two opposite braking surfaces, each of which defines at least partially one of the two main faces of the disc. The disc is provided with a base layer constituted by steel having a nickel content of at most 15% which covers at least one of the two braking surfaces of the braking band.

To provide a friction material that exhibits superior wear resistance and fade resistance under high load conditions, among other frictional performance characteristics. [Solution] A friction material comprising a fibrous base material, a friction modifier, and a binder, wherein the copper content is 0.5% by mass or less in terms of copper element, the fibrous base material contains steel fibers, the steel fiber content is more than 20% by mass and less than 50% by mass, and the friction modifier contains titanium carbide powder.

The present invention relates to a brake disc for a disc brake, and in particular, comprises two opposing brake surfaces (2a, 2b), each brake surface including a brake band (2) defining at least one of two main surfaces of the disc (1). The brake band (2) is made of gray cast iron or steel, preferably stainless steel. The brake disc includes a surface coating (3) covering at least one of the two brake surfaces of the brake band. The brake band (2), which at least partially defines one of the two main surfaces of the disc (1), is made of gray cast iron or steel, preferably stainless steel. The disc consists of a surface coating (3) covering at least one of the two brake surfaces of the brake band. The surface coating (3) is based on a mixture of one or more aluminum oxides and one or more titanium oxides, and the surface coating (3) is darker in color than the steel or gray cast iron of the brake band (2).

A friction material with reduced storage time is described, comprising a binder composition based on a hydraulic binder and its use in brake pads and industrial applications.

The present invention relates to the field of carbon-ceramic composite materials, in particular to a non-dense carbon-ceramic friction material, and a preparation method therefor and the use thereof. The non-dense carbon-ceramic friction material is obtained by subjecting a C / C-Si green body to a silicon infiltration treatment using silicon powder. The raw materials for preparing the C / C-Si green body comprise chopped carbon fibers, graphite powder, a ferrosilicon mixture, silicon carbide powder, boron nitride powder, and phenolic resin powder. The non-dense carbon-ceramic friction material is made to have a porosity of 15-25 vol.%, a high-temperature resistance limit of 1350°C and a compressive strength of 80.5 ± 2.4  MPa; therefore, a friction plate prepared therefrom exhibits a wear amount of 52.8-95.0  μm and a friction coefficient of 0.6-0.7 in an AK master program test. Compared with friction materials in the prior art, the non-dense carbon-ceramic friction material has the advantages of a non-dense structure, a light weight, high-temperature resistance, etc.

Friction unit (100) for a disc brake (300) of a vehicle, comprising: a support plate (1); and a friction lining (2) with a friction material layer (21) having a contact surface (21a) for contacting a disc (310) and a backing layer (22) having an inner surface (22a) oriented opposite to the contact surface (21a) and connected to the carrier plate (1), wherein the underlay layer (22) has at least one slot (3) which is formed in the inner surface (22a) and forms a cavity, wherein the underlay layer (22) has a predetermined thickness (t22), and wherein the at least one slot (3) has a depth (d3) which is less than the thickness (t22) of the underlay layer (22).

The present invention relates to a molding material including an inner layer made of a carbon-based material and respective outer layers made of a carbon ceramic material composed of carbon and silicon carbide. Preferably, the molding material is molded to form a disk brake disk.

The invention relates to a method for the localized heat treatment of an aircraft brake disk (1) based on carbon-carbon composite, the disk (1) being provided with two friction faces each located on one side of the disk (1), the method being characterized in that it comprises: - placing an electrode (11), on each side of the disk (1), in electrical contact with a region to be treated (17) of the disk (1), an electrical insulator (14) being arranged on at least one friction face, in a vicinity of the region to be treated (17); and - generating an electric current between the two electrodes (11) so as to heat the region to be treated (17) by Joule heating.

Arrangement for a disc brake (1), comprising one or more brake pads (3a, 3b) and a brake disc (2), wherein the at least one brake pad (3a, 3b) has a pad carrier plate (4a, 4b) and a pad body (5a, 5b), wherein the at least one brake pad (3a, 3b) is configured and connected to a compressed air source such that compressed air can be forced through it onto the brake disc (2) in order to release it from the brake disc (2) when the disc brake is released during / after braking, wherein the at least one brake pad (3a, 3b) has at least one first opening (7a, 7b) or several such openings through which compressed air is directed onto the brake disc (2) when the disc brake (1) is released, and wherein the at least one opening (7a, 7b) is designed as a channel (8a, 8b, 12a) which is defined by the pad carrier plate (4a, 4b) and the pad body (5a, 5b) extends through and is connected by a hose ora pipe section is formed which is placed as a separate component on or in the brake pad (3a, 3b), wherein the separate component which forms the channel (8a, 8b, 12a) is made of a material which wears down together with the pad body (5a, 5b) during braking, characterized in that the channel (12a) widens in the direction of application of the brake pad (3a, 3b) in the pad body (5a, 5b) to a cavity (13) which, in conjunction with the brake disc (2) and the pressurization of the channel (12a) or the cavity (13) with compressed air, becomes a chamber of an aerostatic air bearing.

An asbestos free friction material composition and associated brake pad for vehicles including inorganic and / or organic and / or metallic fibers, at least a binder, at least a friction modifier or lubricant, at least a filler or abrasive and at least a soluble salt of barium and / or calcium and / or aluminum and / or silver with percentage between 0.5-10% by weight. Among them barium carbonate, calcium hydroxide, aluminum triacetate and silver acetate are preferably.

The utility model discloses a synthetic brake shoe for subway belongs to brake shoe technical field, including the friction body, and the one side both ends all have a plurality of evenly distributed material grabbing hole, and the other side both ends all are fixed with two back iron, the friction body one side both ends all are equipped with material grabbing claw mechanism, use synthetic brake shoe for subway, and the friction body does not easily break, and the friction body will not exist the risk of separation with back iron.

A brake pad for a disc braking system comprising a caliper and a disc comprises a tribologically active friction member (2), a support (3) of the friction member (2) coupled to the friction member (2) and intended, in use, for assembling the brake pad in the caliper, an anchoring system for anchoring the friction member (2) to the support (3); the anchoring system comprises a net (5), associated with the support, and a plurality of nails (7a, 7b), welded to the support (3), that are incorporated into the friction member (2).

This invention discloses a wet-process carbon fiber paper-based composite friction material and its preparation method, belonging to the field of friction material technology. The material, by mass percentage, comprises 30%-50% reinforcing fiber skeleton, 25%-40% resin bonding matrix, 5%-15% functional filler, and the remainder being process aids and pores. The reinforcing fiber skeleton is composed of surface-modified carbon fibers and at least one hybrid high-performance fiber. The key to its preparation method lies in employing a programmed hot-pressing curing process including a "pressure reduction-heating" stage. By precisely controlling the balance between resin viscosity, foaming gas pressure, and curing rate, a multi-level porous structure characterized by low-torsion through-holes is constructed in situ within the material. This invention effectively solves the problems of rapid thermal decay of the friction coefficient and high wear rate caused by weak interfacial bonding and uncontrollable pore structure in traditional paper-based friction materials, achieving a synergistic improvement in high and stable friction performance, excellent wear resistance, and heat resistance, making it suitable for high-end wet transmission systems.

This invention discloses a copper-based powder metallurgy friction plate for wind turbine torque limiters and its preparation method. The friction plate blank is first subjected to pressureless sintering to obtain a pre-sintered blank, and then the pre-sintered blank is re-pressed to obtain a re-pressed friction plate blank. The re-pressed friction plate blank is then assembled with a copper-plated steel backing to obtain a composite blank, which is then subjected to pressure limiting sintering to obtain the final product. The preparation method of this invention, through the synergy of pressureless pre-sintering, re-pressing, and pressure limiting sintering, obtains a copper-based powder metallurgy friction plate for wind turbine torque limiters with small deformation, high density, and excellent mechanical and tribological properties.

This utility model relates to the field of brake shoe assembly technology, specifically disclosing an easy-to-assemble brake shoe assembly, including a brake shoe and two symmetrically distributed friction pads that fit against the outer wall of the brake shoe. Two brake shoe ribs are welded to the lower side of the brake shoe. An assembly mechanism is provided between the brake shoe and the two friction pads. The assembly mechanism includes arc-shaped limiting grooves respectively opened on both sides of the brake shoe; limiting posts simultaneously pass through the first and second limiting holes to form a rigid lock, thereby achieving rapid and precise assembly of the friction pads and brake shoes without specialized equipment, significantly reducing assembly costs and improving operational convenience. The arc-shaped limiting plate can be freely removed along the limiting groove, achieving non-destructive disassembly of the friction pads. This method completely avoids the risk of damage to the brake shoe substrate structure caused by traditional destructive removal, ensures the reusability of core components, significantly reduces maintenance costs, and extends the overall service life of the braking system.

The invention relates to a brake element carrier body having a metallic main body, wherein a surface of the main body is at least partially, preferably completely, coated with an alloy, the alloy being diffused into the main body in a diffusion zone. This alloy is specified in advantageous embodiments.

Method of obtaining a backing plate (11) for a brake pad (13), comprising the steps of: providing a band (113) of a material suitable for the making of the backing plate (11); carrying out, on said band (113), the blanking of the backing plate (11) so as to define, on said backing plate (11), a front surface (11a) and a back surface (lib) essentially parallel to each other, the flat front surface (11a) being adapted to receive a layer of friction material; carrying out, on said band (113), the coining of a plurality of engagement recesses (19) on the front surface (11a); characterized in that the engagement recesses (19) are distributed over the front surface (19a) in a non-uniform way and in accordance with a predetermined pattern.

The invention relates to a disc (1) for disc brakes, comprising a braking band (2), equipped with two opposing braking surfaces (2a, 2b), the braking band (2) being made of gray cast iron or steel, said disc comprising a base layer (30) covering at least one of the two braking surfaces (2a, 2b) of the braking band (2). Said base layer (30) consists of a matrix of titanium and / or a titanium alloy comprising one or more carbides and defines a tribologically active surface of the disc (1); or said base layer (30) consists of a layer of titanium and / or a titanium alloy and is in turn covered by a coating layer (300), which in turn consists of a layer based on one or more carbides and defines a tribologically active surface of the disc (1). Said one or more carbides are selected from the group consisting of titanium carbide (TiC), tungsten carbide (WC), chromium carbide, niobium carbide (NbC), molybdenum carbide (Mo2C), silicon carbide (SiC). At the interface between said base layer (30) and the braking band (2) in gray cast iron or steel there is an intermediate interfusion layer (32) having a mixed composition between said base layer (30) and the braking band (2), said base layer (30) having a crystalline structure with a growth direction predominantly orthogonal to the braking surface.

The application discloses a novel lightweight bimetallic brake drum, which comprises an outer shell, reinforcing ribs are designed on the circumferential part of the outer shell, an annular reinforcing band is designed on the large end face of the outer shell, a plurality of groups of fixing holes are uniformly arranged on the circumferential annular part of the outer shell, a plurality of friction plates are installed on the inner wall of the outer shell, the outer shell is made of steel material, the friction plates are made of high-carbon wear-resistant gray cast iron material or ceramic material, the friction plates are in an arc shape, counterbores are designed on the surfaces of the friction plates, no less than three friction plates are arranged in a single outer shell, a gap is reserved between two adjacent friction plates, the outer shell and the friction plates are connected and fixed through fasteners, and the threads of the fasteners are coated with thread locking agents. The application has the advantages of lightweight design, light weight, reduction of about 20%-30% of a traditional brake drum, consideration of fuel consumption, long service life, prevention of cracking of the brake drum due to heat recession of a brake motor, influence on driving safety and reduction of maintenance cost in the later period.

The invention provides a method for protecting a carbon-containing composite component against oxidation, the method comprising at least: applying a first coating composition in the form of an aqueous suspension on the outer surface of the component, the first coating composition comprising: a metal phosphate; a powder of a titanium-containing component; and a B4C powder; subjecting the applied first coating composition to a heat treatment to obtain a first coating on the outer surface of the component; applying a second coating composition on the first coating composition, the second coating composition comprising: an aqueous suspension of colloidal silica; a borosilicate glass powder; and a TiB2 powder; and subjecting the applied second coating composition to a second heat treatment to obtain a second coating on the first coating. By the particular selection of the first coating composition and the second coating composition in the order specified by the invention, a coating of increased thickness is obtained, which has good adhesion and imparts excellent oxidation resistance in wet media and at very high temperatures.

This invention relates to a friction material comprising a friction adjusting material, a fiber substrate, and a bonding material. The friction adjusting material contains tungsten powder, the content of which is 0.5% to 10.0% by mass of the friction material. The fiber substrate contains steel fibers, the content of which is 1.0% to 30.0% by mass of the friction material. The friction material does not contain copper.

The application provides a kind of friction composite material, friction component and its preparation method, it is related to the technical field of friction material.Friction composite material includes the following components by weight: ginger straw fiber-based porous carbon 15~25 parts, binder 15~25 parts, friction performance regulator 10~15 parts, filler 15~25 parts, aramid fiber 5~10 parts, glass fiber 6~12 parts and auxiliary agent 2~5 parts.Friction component, a plurality of ridge-groove structure stripes are arranged on the friction surface along the friction direction, and an arc groove along the friction direction is arranged on the friction surface.The inherent microporous structure formed after carbonization of ginger straw fiber has a high specific surface area, which can effectively dissipate the vibration wave energy generated during braking.The physical barrier and scattering effect of the bionic "ridge-groove" structure on the component friction surface on the vibration wave are coordinated, which greatly suppresses the generation of brake noise from the source.

A brake caliper for disc brakes comprises a caliper body having a pair of half-calipers, one of which houses at least a first pad and the other of which houses at least a second pad, the brake caliper comprising thrust means, the first and second pads comprising a plate and a friction coating, the plate comprising a rear surface adapted to receive the thrust of the thrust means and an opposite front surface associated with the friction coating, the friction coating comprising a friction surface, at least the first pad comprising at least one delivery hole extending through the first pad between the friction surface and the rear surface, the brake caliper comprising at least one containing device defining a containing compartment therein, the containing device being positioned facing the rear surface and facing the delivery hole, so that the containing compartment communicates with the delivery hole, the containing device comprising a filter housed at least partially in the containing compartment, the filter being configured to retain and / or capture particulate matter.

The application discloses a Cr-Ti-V-based out-of-plane ordered MAX phase ceramic material and application thereof. The ceramic material takes Cr2TiAlC2 as a matrix, is prepared by controlling a solid solution amount of V elements to partially replace Ti elements, and has a chemical formula of Cr2(Ti 1‑x V x )AlC2; wherein 0

A method for treating a piece (1) made of a first porous material (8) with a second material (2) when this second material is in liquid state, said second material (2) being suitable for infiltration when a predetermined temperature range (DTi) and a predetermined field of infiltration pressure (Dpi), comprises the steps of: - providing a crucible (4) suitable for containing the piece (1) and the second material (2) and capable of withstanding the temperatures and pressures for the infiltration of the second material (2) in the piece (1); providing a cover (5) for the crucible (4) suitable for closing the crucible creating a chamber (6) inside the crucible; placing the piece (1) and the second material (2) in said crucible chamber (6), when this second material is not yet in liquid state; -subsequently closing the crucible (4) with the cover (5); -at a pressure (pa or pal)- unsuitable for the infiltrations of the second material in the first porous material, raising the temperature of the piece (1). and the second material (2) contained in the crucible up to a predetermined temperature (T2) suitable for liquefying said second material (2) for making it suitable for infiltration in said piece (1) made of first porous material; - subsequently, lowering the pressure to a predetermined pressure value (p2) lower than the previous pressure (pa or pal) and allow the infiltration of the second material (2) in said piece (1) made of first porous material (8).

A brake caliper for a disc brake comprises: a caliper body having a first half caliper housing a first pad and a second half caliper housing a second pad; a thrust device configured to bias the first pad and the second pad against a brake disc, the first pad and the second pad comprising a plate and a friction lining, the plate comprising a rear surface and an opposite front surface, the rear surface being suitable to receive a thrust force from the thrust device, the friction lining being associated with the front surface, the thrust device being positioned facing the rear surface of the first pad, the first pad comprising a delivery hole extending through the plate between the front surface and the rear surface; a filter configured to retain and / or capture particulate matter, the first half caliper being formed with a housing compartment open in the direction of the rear surface of the plate of the first pad and facing the delivery hole, the filter being housed inside the housing compartment, the filter being positioned facing the rear surface and facing the delivery hole so that the filter is in communication with the delivery hole.

An article (1) and a method of manufacturing such an article, the article comprising: a steel base body (2) having a surface (3) provided with a plurality of micromechanical locking units for forming a micromechanical lock with another object when the micromechanical locking unit is pressed into a surface of the other object, the micromechanical locking unit comprising: a recess (6) surrounded by a ridge (7), wherein the angle of the surface of the recess that is intermediate between the bottom of the recess (6) and the top of the ridge (7) relative to the surface (3) is between 30° and 75°, preferably between 45° and 70°.

The application provides a modified metal fiber, a preparation method, a modified metal fiber-based brake pad, a vehicle braking system and a vehicle, and comprises: a metal fiber; a metal oxide layer coated on the surface of the metal fiber, the composition of the metal oxide layer comprising a metal oxide; and a modification layer coated on the surface of the metal oxide layer, the composition of the modification layer comprising a phosphate; the application uses the modified metal fiber as a raw material for preparing a brake pad, and the phosphate inorganic binder attached to the surface of the metal fiber improves the adhesion of the metal fiber and other powders, so that the metal fiber is uniformly distributed in the obtained brake pad and the metal fiber is closely combined with the matrix, the exposure of the metal fiber during braking is improved, and the wear amount and braking noise are effectively reduced.

This invention discloses a method for preparing a resin-based friction material for enhancing torque limiters, comprising the following steps: Step 1, performing surface and interface modification treatment on the metal powder, thereby constructing a multi-level composite interface structure on the surface of the metal powder, consisting of a roughening layer, an activation transition layer, and an organic coupling layer. The organic coupling layer is composed of organic molecules containing active groups, used to form chemical bonds between the metal surface and the resin; Step 2, mixing the metal powder with the multi-level composite interface structure with modified phenolic resin, fibers, and fillers; Step 3, pressing and heating the mixed material to form a friction composite material with a continuous interface bridging structure; the corresponding formulation is also disclosed. The wear rate of the product of this invention is reduced by more than 50% compared with the unmodified system, the compressive strength is increased by more than 20%, and the friction coefficient is significantly improved and remains stable, exhibiting excellent comprehensive friction performance.

The utility model relates to the technical field of brake discs, in particular to a brake disc with a drainage function, which comprises a disc body of the brake disc, blind holes are arranged in the disc body, the blind holes are uniformly distributed along the circumference of the brake disc, brake pads are positioned on rotating tracks of the blind holes, a plurality of strip-shaped holes are arranged on the brake disc, and the strip-shaped holes are communicated with the brake pads. And one end of the strip-shaped hole penetrates through the blind hole and is vertical and communicated with the blind hole, and the other end penetrates out of the outer ring surface of the brake disc and is communicated with the outside. According to the brake disc, through cooperation of the blind holes and the strip-shaped holes, water located between the brake pad and the disc body can be discharged through the blind holes and the strip-shaped holes, meanwhile, negative pressure can be generated through gas flowing, and water flow can be discharged more conveniently.