Abstract: This invention belongs to the technical field of martensitic stainless steels and the moderate hardness, toughness and corrosion resistance required for motorcycle braking disc materials can be provided only by quenching at a broad range of quenching temperature by restraining the content of C+N in the steels to 0.04-0.10% and containing 1.0-2.5% of Mn and 10.0-14.5% of Cr.

Abstract: A friction material member particularly useful in high load and temperature applications and a method for making the same are disclosed. The friction material member is made by preparing a mixture of sinterable metal particles, carbonaceous material, friction enhancers and curable polymeric resin; the mixture comprising at least about 50 percent by weight of metal particles and sufficient resin to coat and bond the metal particles, carbonaceous material and friction enhancers. The mixture is molded and the resin cured to form a piece in a solid preformed shape corresponding to the shape of the mold. Thereafter, the preformed piece is heated in a substantially oxygen free atmosphere for a time and at temperatures and pressures sufficient to fuse at least a portion of the metal particles into a sintered metal matrix. The preformed piece may be sintered to a metal backing plate during the heating step, or may be welded, brazed or soldered to the plate after heating.

Abstract: A friction member of the resin mold type comprising brass fiber of 1-10 mm length having a trapezoid in cross figure thereof as a base material of the friction member, and a phenolic resin of cement composition, to obtain excellent qualities such as good durability at high temperature.

Abstract: A composition of material for use as a friction lining with a cast iron mating surface. The friction lining has an iron powder base that reacts with tin to alloy and hold substantially equal weight percentages of graphite and coke in a fixed position. The friction lining has a substantially constant wear rate up to 300.degree. C. and a linear wear rate between 300.degree.-500.degree. C.

Abstract: An iron-base, sintered powder metal friction material suitable for railroad braking is disclosed. The friction material comprises, by volume, 10-70% carbon; 0-2.5% sulfur; 0-10% alumina; 1-45% of a metal powder additive selected from the group consisting of copper, manganese, ferrochrome, chrome carbide compounds and mixtures thereof; and the balance iron. In preferred embodiments, the powder metal additives are 11-25% copper, or 9-15% manganese, or 5-20% ferrochrome.

Abstract: A cast iron railroad brake shoe containing more than 2% phosphorus with sulfur and manganese present in the ratio of weight % sulfur>weight % manganese/1.8; the amount of sulfur in excess of weight % Mn/1.8 accounts for increased wear resistance in proportion to said excess.

Abstract: A method of providing an improved friction surface and a friction element having such an improved friction surface are disclosed. A surface of a metallic friction element, e.g. a brake pad or a brake disc or drum, is metal-sprayed with a metallic substance which defines asperities the average roughness Ra of which ranges between 3 and 60 microns. Preferably, at least some of the asperities have heights ranging between 20 and 40 microns for a base width between 0.5 and 1 mm.

Abstract: Fe-base sintered alloy friction materials containing 3 to 15% of bismuth of Bi-Pb alloy containing 5 to 100% bismuth, which provide very stable friction coefficient over a wide range from low temperature zones to high temperature zones, and very excellent wear resistance.

Abstract: An iron-based sintered sliding product having improved contact fitness and resistance to wear, in which 0.1 to 3 wt. % free graphite and Fe--P--C ternary alloy phase of hardness MHv 300 to 850 having over 3% to 20% of area are dispersed into an iron-based matrix containing either one selected from 0.1 to 1 wt. % Sn and 0.1 to 1 wt. % Zn, and 1 to 10 wt. % Cu and 0.3 to 1 wt. % C. As a modified embodiment of the present invention, an alloy containing Fe--Mo as a main component may be dispersed into the iron-based matrix in place of the aforesaid Fe--P--C ternary alloy phase. Said Fe--P--C ternary alloy phase may be prepared by mixing a single metal element, Fe, C and P into the powdered raw material of the iron-based matrix. Alternatively, said Fe--P--C ternary alloy phase may be prepared by mixing Fe--P--C alloy powder into the powdered raw material of the iron-based matrix.

Abstract: An asbestos-free gasket forming composition is disclosed. The composition is preferably produced by removing water from an aqueous furnish composition comprising phenolic fibers, aromatic polyamide fibers, an inorganic or cork filler, a synthetic rubber binder, and a water insoluble hydroxide produced from a soluble salt selected from the group consisting of aluminum salts, ferric salts and stannic salts, by reaction with a sufficient amount of an alkaline hydroxide to provide a furnish pH within the range of from about 6 to about 10, and preferably of from about 7 to 8.

Abstract: According to the invention, a sintered iron-based friction material comprises copper, tin, graphite, pyroceramic, lead, and zinc sulphide, the ratio of the components expressed in percent by mass being as follows:copper: 1.5 to 3.0tin: 1.0 to 2.0zinc sulphide: 2.0 to 4.0graphite: 6.0 to 10.0pyroceramic: 2.0 to 5.0lead: 10.0 to 20.0the balance being iron.

Abstract: A brake disk frictional module is provided, composed of sintered metallic material reinforced throughout its entire volume by a grid system of pure metal or metallic alloy. The friction module may be manufactured by sintering the metallic material with the grid reinforcement in either a mold or within the brake disk cup. The internal reinforcement of the frictional module prevents spalling weight loss, friction coefficient decay, or other physical defect as caused by frictional strain during use. The reinforcement material reduces the overall temperature of the disk during use, and aids frictional coefficient of the disk because of the metallic compatibility of the metallic material and grid system.

Abstract: A friction pad for use in disc brakes and is formed of a sintered metal. A recess is formed in a surface of the friction pad which engages with a disc in applying the brake, and is embedded by a resin.

Abstract: In a clutch disk for use in an automobile, the improvement wherein a plurality of supporting plates are separately fastened to the periphery of a plate, and masses of organic friction material and masses of sintered metal friction material are alternately fixed to both surfaces of the supporting plates for forming the frictional sliding surface of the clutch disk.

Abstract: The invention relates to the utilization of a pyrolyzed carbon-containing ribbon which is wrapped about a brake disk core. The ribbon which is impregnated with a bonding agent forms an outer layer when wrapped about the core. An integral brake disk is formed upon pyrolyzation of the bonding compound.

Abstract: A brake disk and process for producing the same which is particularly suitable for use on motorcycles. A stainless steel material of particular chromium content is subjected to a heat-treating and press-quenching step to form a brake disk having a sufficient hardness required for the function of a brake and being of favorable appearance for use on motorcycles.

Abstract: A car retarder shoe structure in which a removable shoe member is attached to the brake beam of a railway car retarder by means of bolts. Each bolt is tapered and the corresponding hole in the shoe is likewise tapered. The tapered portion of the bolt is at least as long as and conforms substantially to the taper of the hole. It is the tapered surface of the bolt shank seated against the tapered hole which serves to hold the shoe in place. The bolt head is shaped or contoured to contact a portion of the shoe and prevent rotation while the nut is being installed. Such structure permits the shoe to remain firmly attached to the brake beam under prolonged or excessive wear conditions caused by the retardation of passing car wheels, even though all or a substantial portion of the shoe and the bolt head are worn away.

Abstract: A brake disc for vehicles is provided to reduce unsprung weight and improve thermal dissipation comprising a core of aluminum alloy clad with stainless steel sheets bonded on each side to form an integral disc.

Abstract: A method of manufacturing a brake drum having a plurality of axially spaced, circumferentially extending ribs provided on the exterior surface thereof. The method includes casting molten grey iron into a mold cavity formed by a plurality of axially split external mold segments spaced radially outward from an internal mold member, spacing the radially inward portions of the interfacing lateral edge surfaces of the external mold segments to form a flash base free of white iron metal at the parting line between adjacent external mold segments and, after cooling the molten iron and removing the mold members, grinding away at least a portion of the flash metal formed between the interfacing lateral edge surfaces of the external mold segments radially outward of the flash base to provide an axially extending ridge free of white iron and traversing the axially spaced ribs.

Abstract: Noise from track retarders is significantly reduced by a brake shoe which dampens vibrations as continuous braking action of a wheel occurs. The brake shoe is adapted to have selectively variable brake surface configurations which contribute to reduced vibration. A special metal alloy, typically a flake-graphite bearing iron with vibration suppression characteristics lubricates the braking surface and lessens wheel oscillations during braking. The lubrication also contributes to uniform surface temperatures along the braking surface which lessens the tendency for the braking to fade. The brake shoe is basically a self-lubricated surface of variable contact area configuration.

Abstract: A disc brake comprising a number of interleaved rotor and stator elements and a brake actuator which is arranged to urge the rotor and stator elements into engagement in order to apply the brake. The engagement surfaces of the rotors and stators are provided with areas of carbon and non-carbon based friction material which are arranged so that the disc brake consists of a number of iron friction pairs and a number of carbon friction pairs, the iron friction pairs being located nearer to an open end of the brake structure so that the friction pairs most likely to be wet are those which perform best when wet.