Embodiments of the disclosure relate to a binder-free, sintered friction lining, for a friction component of a friction assembly, having a friction lining body, which comprises a metallic matrix, at least one abrasive, solid lubricants, and optionally at least one filling material, wherein the solid lubricants are formed by at least two different solid lubricants, which are selected from a group consisting of hexagonal boron nitride and metal sulfides with at least one metal from the group of tungsten, iron, tin, copper, bismuth, antimony, chromium, zinc, silver, manganese, molybdenum.

A phenol resin for a wet friction material of the invention contains a resol-type phenol resin having, in one molecule, a structural unit A which is derived from a phenol compound having one phenolic hydroxyl group and a structural unit B which is derived from a polyfunctional phenol compound having two phenolic hydroxyl groups.

[Object]

To provide the disc brake pad including the friction material having the friction surface with the scorch treatment that can provide sufficient braking effectiveness while preventing the fading phenomenon at the initial stage of the disc brake pad usage.

[Means to Resolve]

In the disc brake pad including the friction material having the friction surface with the heat history due to the scorch treatment, the friction surface has the mixed areas including the area with the large heat history of the scorch treatment and the area with relatively small heat history of the scorch treatment. The following formula needs to be satisfied where the reduction rate of the mass of the inside of the friction material without the heat history due to the scorch treatment when performing the thermogravimetric analysis of the friction material at 500 centigrade is A, the reduction rate of the mass of the friction surface area with the largest heat history due to the scorch treatment when performing the thermogravimetric analysis at 500 centigrade is B1, and the reduction rate of the mass of the friction surface area with the relatively small heat history due to the scorch treatment relative to the friction surface area with the largest heat history when performing the thermogravimetric analysis at 500 centigrade is B2.

30≤B1/A×100≤90

50≤B2/A×100

B2/A×100−B1/A×100≤60  Formula:

[Object]

To provide the disc brake pad including the friction material having the friction surface with the scorch treatment that can provide sufficient braking effectiveness while preventing the fading phenomenon at the initial stage of the disc brake pad usage.

[Means to Resolve]

In the disc brake pad including the friction material having the friction surface with the heat history due to the scorch treatment, the friction surface has the mixed areas including the area with the large heat history of the scorch treatment and the area with relatively small heat history of the scorch treatment. The following formula needs to be satisfied where the reduction rate of the mass of the inside of the friction material without the heat history due to the scorch treatment when performing the thermogravimetric analysis of the friction material at 500 centigrade is A, the reduction rate of the mass of the friction surface area with the largest heat history due to the scorch treatment when performing the thermogravimetric analysis at 500 centigrade is B1, and the reduction rate of the mass of the friction surface area with the relatively small heat history due to the scorch treatment relative to the friction surface area with the largest heat history when performing the thermogravimetric analysis at 500 centigrade is B2.

30≤B1/A×100≤90

50≤B2/A×100

B2/A×100−B1/A×100≤60  Formula:

A friction material including a friction modifier, a binder, and a fiber base material. A steel fiber is contained as the fiber base material. A natural graphite is contained as a lubricant. A content of copper is 0.5% by mass or less in terms of copper element. A titanate is not contained.

Provided are a yaw brake pad and a method of producing the same, which relate to the technical field of friction material. The yaw brake pad is prepared from, by weight, the following main ingredients: 70-75 parts of polyether ether ketone, 10-20 parts of carbon fiber, 3-5 parts of glass fiber and 3-5 of graphite. It alleviates the technical problem that the metal-based friction materials generally for producing current international and domestic yaw brake pads are likely to rust, harmful to dual discs, and produce screechy. It has not only significantly improved mechanical properties and high temperature tolerance, much lower hardness, less wear to dual discs, and lower noise, but also improved friction stability and adaptability to working conditions, and thus can effectively satisfy the demand of the wind driven generator for yaw braking at a low speed.

A brake body according to the present disclosure has a coating layer which contains an iron-based amorphous alloy and is formed on a contact surface at which a friction means rubs against the brake body to generate braking force which the brake body is rotated. The coating layer has a low friction coefficient and thus generates less dust during braking. The coating layer also has high corrosion resistance and wear resistance and may thus guarantee high performance and good price competitiveness when applied to a brake base material produced at low cost.

An example method includes combining an interlayer and a carbon fiber fabric, wherein the interlayer comprises a highly oriented milled carbon fiber ply comprising a plurality of out-of-plane carbon fibers. The method further includes winding the interlayer and the carbon fiber fabric around a core to form a composite fiber preform comprising a plurality of layers defining an annulus extending along a central axis. The method further includes densifying the composite fiber preform.

An example method includes forming an interlayer on a carbon fiber fabric to form a composite fiber fabric. The interlayer comprises a binder. The method further includes winding the composite fiber fabric around a core to form a composite fiber preform comprising a plurality of layers defining an annulus extending along a central axis. The method further includes densifying the composite fiber preform.

A method for producing friction discs for a, in particular radial, dual clutch, includes the following steps: providing a first disc ring with a first inner diameter, providing a second disc ring with a second outer diameter, wherein the second outer diameter is smaller than the first inner diameter, and processing the first disc ring and the second disc ring in a tool for producing the friction discs. The second disc ring is arranged within the first disc ring, and the second and the first disc rings are processed in the tool together.