An axle of railway wheel sets and a corresponding method for the ultrasound inspection are described. A blind hole, coaxial to the axle and sized to accommodate an ultrasonic probe, is obtained in each end of the axle. Main holes are intended to accommodate the probe holder containing a plurality of ultrasonic transducers for the inspection of the axle from the inside of the hole. The main advantage is to facilitate the propagation of the ultrasounds without being subjected to the interference caused by the geometric discontinuities normally present at the ends of the axles thereby minimizing false positives in the readings of the echoes.

The invention relates to metal industry and more particularly to alloy for producing steel wheels, as well as to steel wheels made from such alloy for railway transport. The steel comprises the following components, in % wt.: from 0.45% wt. to 0.60% wt. of carbon, from 0.38% wt. to 0.50% wt. of silicon, from 0.80% wt. to 1.00% wt. of manganese, up to 0.15% % wt. of vanadium, from 0.80% wt. to 1.00% wt. of chromium, up to 0.02% wt. of phosphorus, up to 0.015% wt. of sulfur, up to 0.3% wt. of copper, up to 0.25% wt. of nickel, up to 0.04% wt. of aluminum, a balance of iron. The claimed steel alloy for use in producing railway wheels, either by metal working process or by casting methods, has improved mechanical and operational properties.

The invention relates to metal industry and more particularly to alloy for producing steel wheels, as well as to steel wheels made from such alloy for railway transport. The steel comprises the following components, in % wt.: from 0.45% wt. to 0.60% wt. of carbon, from 0.38% wt. to 0.50% wt. of silicon, from 0.80% wt. to 1.00% wt. of manganese, up to 0.15% % wt. of vanadium, from 0.80% wt. to 1.00% wt. of chromium, up to 0.02% wt. of phosphorus, up to 0.015% wt. of sulfur, up to 0.3% wt. of copper, up to 0.25% wt. of nickel, up to 0.04% wt. of aluminum, a balance of iron. The claimed steel alloy for use in producing railway wheels, either by metal working process or by casting methods, has improved mechanical and operational properties.

A forged wheel for a chassis of a rail vehicle includes a wheel web, a wheel hub and a wheel rim with a running surface and a wheel flange, where material is recessed out of the wheel web, which is solid in sections, between the wheel hub and the wheel rim, in sections extending in the circumferential direction or transversely with respect to a radial direction of the wheel web, and where at least a first distance and a second distance between a recess centre point of a first recess in the wheel web and an edge of the first recess differ in size such that a lightweight wheel that can be manufactured with little outlay and that has high strength and quality is obtained.

In a cross section of the hub part of the railway wheel, obtained when the hub part is cut in a central axis direction of the through hole along a plane including a central axis, when regions of 15 mm?15 mm defined by a plurality of axial line segments parallel to the central axis and arranged at a pitch of 15 mm in a radial direction from an inner peripheral surface of the through hole, and by a plurality of radial line segments perpendicular to the central axis and arranged at a pitch of 15 mm in the central axis direction from a surface of the hub part in which an opening of the through hole is formed are defined as rectangular regions, the average C concentration in each rectangular region in the cross section of the hub part is less than 0.90% by mass.

A railway wheel includes: a wheel including a plate portion; and a brake disc including a circular plate portion whose front face side is a sliding surface, and a plurality of fin portions which are radially projected on a back face of the circular plate portion, wherein two of the brake discs are fastened in a region within the sliding surface. Regarding an area of a section crossing a space between the brake disc and the wheel along a circumferential direction, a minimum section portion in which the sectional area is minimum is present in a region formed by an outer peripheral surface of the circular plate portion and an inner peripheral surface of the rim portion, and the outer peripheral surface of the circular plate portion follows the inner peripheral surface of the rim portion in a region extending to the outer side from the minimum section portion.

A railway wheel includes: a wheel including a plate portion; and a brake disc including a circular plate portion whose front face side is a sliding surface, and a plurality of fin portions which are radially projected on a back face of the circular plate portion, wherein two of the brake discs are fastened in a region within the sliding surface. Regarding an area of a section crossing a space between the brake disc and the wheel along a circumferential direction, a minimum section portion in which the sectional area is minimum is present in a region formed by an outer peripheral surface of the circular plate portion and an inner peripheral surface of the rim portion, and the outer peripheral surface of the circular plate portion follows the inner peripheral surface of the rim portion in a region extending to the outer side from the minimum section portion.

A wheel for a displacement truck comprises a wheel body and removable ribs. The ribs are segmented into at least two parts to facilitate removal from the wheel body.

A noise-absorbing device for a railway vehicle wheel includes: at least one strip extending radially from a connecting end capable of being fastened to the periphery of the wheel, to a free end; and at least one damping mass fastened on a face of the free end of the strip, away from the connecting end. The strip includes at least two metal or composite layers and at least one layer of viscoelastic material gripped between the two or composite metal layers.

An adjustment device for a track conditioning unit has a measuring unit for determining a lateral offset of a rail, travelled on by a rail vehicle, relative to an effective range of a track conditioning unit or a measuring unit for determining the relative position of a bogie with respect to the rail car body. The adjustment device contains a determining unit for determining an actuation command for an actuation unit in accordance with the determined lateral offset between the effective range of the track conditioning unit and the rail. Part of the adjustment device for the track conditioning unit is also an actuation unit for actuating an actuator unit of the track-conditioning unit with an adjustment command which is generated on the basis of the actuation command. The actuator unit adjusts an effective range of the track conditioning unit on the basis of the adjustment command.