Abstract: The present invention discloses a low cost lean production bainitic steel wheel for rail transit and a manufacturing method therefor. The steel wheel contains elements with the following weight percentages: carbon C: 0.15-0.45%, silicon Si: 1.00-2.50%, manganese Mn: 1.20-3.00%, rare earth RE: 0.001-0.040%, phosphorus P?0.020%, and sulphur S?0.020%, where the remaining is iron and unavoidable residual elements, and 3.00%?Si+Mn?5.00%. Compared with the prior art, through alloying design and a preparation process, especially a heat treatment process and technology, a rim of the wheel obtains a carbide-free bainite structure, and a web and a wheel hub obtain granular bainite, a supersaturated ferritic structure, and a small amount of pearlite. The wheel has high comprehensive mechanical properties and service performance.

Abstract: A railroad wheel has a wear resistant flange (3) or tire or rim, comprising the surfaces, which can touch the rail during travelling. On the circumferential outer surface (4) of flange (3) of the wheel (2) an anti-abrasion layer (1) is placed in a durable manner.

Abstract: A rail wheel with a wheel body and wheel brake discs connected thereto with fastening elements on both sides is designed in such a way that at least in the respective contact regions of the wheel brake discs a mechanically and thermally highly resilient intermediate layer is arranged on the wheel body

Abstract: Systems and processes for manufacturing railcar components, such as railcar wheels, using carbon nanofiber composite materials.

Abstract: A rail wheel with a wheel body and friction discs connected thereto on both sides by fastening elements, wherein a multi-layer coating is arranged at least between the respective contact surfaces of the friction discs and the contact surfaces of the wheel body with a coating which can be subjected to mechanically and thermally high loading. Also disclosed is a method for producing a rail wheel.

Abstract: A self-cooling trolley includes a wheel formed of a non-ferromagnetic material with a groove between two flanges disposed on a circumference. At least one pair of magnets are disposed in proximity to the wheel. Each pair of magnets comprises a north magnet with a north magnetic pole in proximity to the wheel and a south magnet with a south magnetic pole in proximity to the wheel. The at least one pair of magnets generate an eddy current within the rotating wheel opposing an angular motion of the wheel. Self-cooling means is provided on the wheel to generate an air flow toward and/or away from the wheel as the wheel rotates. Related methods are also described.

Abstract: A method of treating a steel railway wheels to form a required distribution of compressive residual stress in the rim. In general terms the wheel heated and then quenched from the plate towards the rim. The wheel is first heated to form austenite throughout the plate and rim portions. The wheel is then cooled to form bainite/martensite in the plate portion. The wheel is cooled to form bainite/martensite in an inner portion of the rim. The wheel is cooled to form bainite/martensite in an outer portion of the rim.

Abstract: Steels having a pearlitic structure and containing 0.65 to 0.80 weight percent carbon, 0.90 to 1.10 weight percent silicon, 0.85 to 1.15 weight percent manganese, 0.001 to 0.030 weight percent phosphorus, 0.009 to 0.013 weight percent niobium, 0.05 to 0.15 nickel, 0.20 to 0.30 weight percent molybdenum, 0.10 to 0.30 weight percent vanadium and 0.005 to 0.040 weight percent sulfur with the remainder of said steel being iron and incidental impurities, can be used to make railway wheels that are particularly resistant to rolling contact fatigue and, hence, shelling.

Abstract: Steels having a pearlitic structure and containing 0.65 to 0.80 weight percent carbon, 0.90 to 1.10 weight percent silicon, 0.85 to 1.15 weight percent manganese, 0.001 to 0.030 weight percent phosphorus, 0.009 to 0.013 weight percent niobium, 0.05 to 0.15 nickel, 0.20 to 0.30 weight percent molybdenum, 0.10 to 0.30 weight percent vanadium and 0.005 to 0.040 weight percent sulfur with the remainder of said steel being iron and incidental impurities, can be used to make railway wheels that are particularly resistant to rolling contact fatigue and, hence, shelling.

Abstract: Steels having a pearlitic structure and containing 0.65 to 0.80 weight percent carbon, 0.90 to 1.10 weight percent silicon, 0.85 to 1.15 weight percent manganese, 0.001 to 0.030 weight percent phosphorus, 0.009 to weight percent niobium, 0.05 to 0.15 nickel, 0.20 to 0.30 weight percent molybdenum, 0.10 to 0.30 weight percent vanadium and 0.005 to 0.040 weight percent sulfur with the remainder of said steel being iron and incidental impurities, can be used to make railway wheels that are particularly resistant to rolling contact fatigue and, hence, shelling.

Abstract: Steels having a pearlitic structure and containing 0.65 to 0.80 weight percent carbon, 0.90 to 1.10 weight percent silicon, 0.85 to 1.15 weight percent manganese, 0.001 to 0.030 weight percent phosphorus, 0.009 to 0.013 weight percent niobium, 0.05 to 0.15 nickel, 0.20 to 0.30 weight percent molybdenum, 0.10 to 0.30 weight percent vanadium and 0.005 to 0.040 weight percent sulfur with the remainder of said steel being iron and incidental impurities, can be used to make railway wheels that are particularly resistant to rolling contact fatigue and, hence, shelling.

Abstract: A steel alloy, particularly adapted for the manufacture of railway wheels is provided. Such alloy comprises essentially, in weight percentage, carbon 0.67-0.77, manganese 0.70-0.85, silicon 0.65-0.85, phosphorus less than 0.025, sulfur less than 0.025, chromium 0.18-0.25, molybdenum 0.08-0.12, with the balance essentially iron. Another lower carbon alloy comprises essentially, in weight percentage, carbon 0.16-0.45, manganese 0.90-1.10, silicon 0.50-0.70, phosphorous less than 0.035, sulfur less than 0.035, nickel 1.0-1.5, chromium 0.40-0.60 and molybdenum 0.40-0.60.

Abstract: This invention relates to a safety wheel, for a subway coach bogie, or the like, running on pneumatic tires, adapted to be interposed between a chassis of the bogie and a corresponding tire, said wheel presenting an outer peripheral zone having a braking portion as well as a guiding portion projecting radially outwardly from the braking portion, the hardness of the braking portion being much greater than the hardness of the guiding portion. This may be achieved for example by effecting a selective tempering of the braking portion by peripheral nozzles projecting a cooling liquid. This safety wheel is considerably longer lasting than those of the prior art.

Abstract: A trolley wheel for a load lifting apparatus that is movable along a rail having a horizontal supporting surface. The wheel includes a crowned tread surface for rolling contact with the rail and a flange for stabilizing the tread surface in position on the rail. The flange includes a substantially crowned realigning portion for realignment of the wheels on the rail with minimal contact or binding. The flange also includes an undercut portion for added clearance between the flange and the rail. Preferably, the crowned tread surface and crowned realigning portions are heat treated for improved wear resistance. The undercut may also be heat treated for added toughness.

Abstract: A wheel has both wear resistance and heat-crack resistance sufficient for use in a high-speed railway vehicle. The chemical composition of a base steel comprises 0.4 to 0.75 % C, 0.4 to 0.95% Si, 0.6 to 1.2% Mn and less than 0.2% Cr. The wheel has a pearlitic microstructure in a region of at least 50 mm in depth from the tread surface of the wheel. When the tread of the wheel is quenched, a particular cooling process is applied in order to obtain the pearlitic structure.

Abstract: A robot carrier structure constituted by a portal wagon movable on rails and laterially supported by a pair of carriages each comprising a pair of wheels longitudinally coupled by motion transmission means actuated in synchronism by an electric motor. Further the two electric motors of the pair of carriages are so connected as to constitute an electric axis. Each wheel has a structure adapted to ensure a high adherence to the rail, particularly due to the provision of a pair of rings of elastomeric material engaging the rolling surface of the rail.

Abstract: A disk wheel, especially a railroad wheel, has a composite construction of single piece metal hub and a single piece metal rim connected to each other by a wheel disk of fiber reinforced composite material providing exclusively adhesive bonds. The wheel disk transmits shearing stress between hub and rim. The rim is provided with two radially inwardly extending rim flanges. The hub has two radially outwardly extending hub flanges. The shearing stress transmitting wheel disk (12) has a radially outer rim contacting surface (9) adhesively bonded to the rim (3) and rim flanges (7), and a radially inner hub contacting surface (8) adhesively bonded to the hub (2) and hub flanges (6). The wheel disk (12) is inserted into the space between the concentrically arranged hub and rim as long as the composite material is not yet cured and hence sufficiently deformable. The wheel disk is exposed to compression during curing.

Abstract: A robot carrier structure constituted by a carriage movable on rails and supported on four wheels two of which are mounted on a driven shaft and two are idle wheels. Each drive wheel has a structure adapted to ensure a high adherence to the rail, particularly due to the provision of a pair of rings of elastomeric material in engagement with the rolling surface of the rail. Engagement means movable laterally on the rail are provided to increase the adherence of the drive wheels.

Abstract: A method for manufacturing a railway wheel with a base material, a more wear-resistant layer at the part of the flange facing the wheel tread, and a layer in the tread which gives a high friction between wheel and rail which is relatively independent of the weather. The method is characterized in that a prefabricated component is manufactured from members of the base material and from the more wear-resistant materials, respectively, which members are given such a shape as to fit closely against each other, and which, after turning or other machining and cleaning from oxide and other impurities, are put together and welded together at the outer surfaces of the component in such a way that admission of air between said members is prevented, the component thereafter being hot-worked to form a finished or near finished wheel blank with a good bond between the different members defining the tread and/or flange regions thereof.

Abstract: A wheel, especially a disk wheel has six components, namely, two mirror-setrical hub sections, a wheel rim, two bending resistant wheel disks and a thrust and/or shear resistant body enclosed by the rim, by the two hub sections, and by the two wheel disks whereby metal components and fiber composite material components are bonded to one another to form the wheel. The materials of these components are selected for three purposes, to simplify the construction, to optimize the strength characteristics of the wheel, and to greatly increase the wheel's ability to dampen vibrations. The hub sections and rim are made of metal, the disks are made of fiber compound material and the enclosed body is made of metal or fiber compound material all held together by an adhesive bond. The hub sections have radially extending flanges which intermesh with the radially inner edge of the wheel disks in a multilayer fashion. The thrust and/or shear resistant body has preferably a honeycomb type structure.

Abstract: Abrasion resistant rails or rail wheels formed from a steel alloy having between 0.02 to 0.35 percent by weight of lead or bismuth, and a process for the production of the same comprising alloying 0.02 to 0.35 percent by weight of lead or bismuth with a rail or rail wheel steel.

Abstract: A rail wheel comprising a wheel rim, wheel disc and a wheel hub wherein at least the wheel rim consists essentially of a steel having the following composition:0.04 to 0.12 weight percent carbon0.20 to 0.70 weight percent silicon3.5 to 5.0 weight percent mangangese0.005 to 0.025 weight percent nitrogen0.002 to 0.4 weight percent niobium = vanadium,The balance being iron with the usual impurities; a process for forming such rail wheel.