In order to provide a development of friction ring elements for a friction ring set for arranging on the wheel web of a track wheel in order to form a track wheel brake, wherein the friction ring elements can be simply and cost-effectively produced and can be easily fitted with linking elements, a friction ring element (10) is proposed for a friction ring set (200) for arranging on the wheel web (2) of a track wheel (1) for a railway vehicle in order to form a track wheel brake (100), wherein the friction ring element (10) has a friction ring (11) and multiple linking elements (12, 13) designed as separate components and arranged on the friction ring (11), and wherein at least some of the linking elements (12, 13) are force-lockingly connected to the friction ring (11).

A solid wheel for a rail vehicle includes a wheel rim arranged on the circumference of the solid wheel, a tread and a hub for a wheelset shaft, wherein the wheel rim is connected to the hub via an end wall and a rear wall, where the hub is arranged at the center of the solid wheel and includes a longitudinal axis such that a high radial and axial strength of the wheel flange as the basis for a low sound emission is provided by virtue of the solid wheel forming a cavity that is delimited by the end wall and the rear wall, where the end wall and the rear wall transition into each other below the wheel flange in an arched manner, and the end wall has first openings and the rear wall has second openings in order to open the cavity outwards in a spoked manner.

A friction apparatus is provided. The friction apparatus includes: a first member having a first surface; and a second member having a second surface that contacts the first surface, and moving while in contact with the first member, wherein at least one of the first surface and the second surface is hardened.

A friction apparatus is provided. The friction apparatus includes: a first member having a first surface; and a second member having a second surface that contacts the first surface, and moving while in contact with the first member, wherein at least one of the first surface and the second surface is hardened.

A disc portion and a rim portion of a tire wheel are integrally formed simultaneously, with a resonance pipe formed between the disc and rim portions, by inserting a molten metal into a space formed by a mold combined with the resonance pipe by core pins.

A railway wheel in which formation of pro-eutectoid cementite is suppressed is stably produced.

After heating an intermediate product containing, in mass %, C: 0.80 to 1.15% to a temperature not less than A.sub.cm transformation point, the intermediate product is cooled such that the cooling rate ( C./sec) in a range from 800 to 500 C. satisfies the following conditions: Surface other than the tread and the flange surface: not more than Fn1 defined by Formula (1), Cooling rate in a region in which cooling rate is slowest: not less than Fn2 defined by Formula (1), and Tread and flange surface: not less than Fn2:

Fn1=5.0+exp(5.6511.427C1.280Si0.7723Mn1.815Cr1.519Al7.798V)(1)

Fn2=0.515+exp(24.816+24.121C+1.210Si+0.529Mn+2.458Cr15.116Al5.116V)(2)

A railway wheel in which formation of pro-eutectoid cementite is suppressed is stably produced.

After heating an intermediate product containing, in mass %, C: 0.80 to 1.15% to a temperature not less than A.sub.cm transformation point, the intermediate product is cooled such that the cooling rate ( C./sec) in a range from 800 to 500 C. satisfies the following conditions: Surface other than the tread and the flange surface: not more than Fn1 defined by Formula (1), Cooling rate in a region in which cooling rate is slowest: not less than Fn2 defined by Formula (1), and Tread and flange surface: not less than Fn2:

Fn1=5.0+exp(5.6511.427C1.280Si0.7723Mn1.815Cr1.519Al7.798V)(1)

Fn2=0.515+exp(24.816+24.121C+1.210Si+0.529Mn+2.458Cr15.116Al5.116V)(2)

Provided is a railway wheel capable of suppressing formation of pro-eutectoid cementite even if the C content is high. A railway wheel according to an embodiment of the present invention has a chemical composition consisting of: in mass %, C: 0.80 to 1.15%; Si: 0.45% or less; Mn: 0.10 to 0.85%; P: 0.050% or less; S: 0.030% or less; Al: 0.120 to 0.650%; N: 0.0030 to 0.0200%; Cr: 0 to 0.25%; and V: 0 to 0.12%, with the balance being Fe and impurities, wherein an amount of pro-eutectoid cementite, which is defined by Formula (1), in a microstructure of the railway wheel is not more than 1.50 pieces/100 m:

Amount of pro-eutectoid cementite (pieces/ 100 m)=a total sum of the number of pieces of pro-eutectoid cementite which intersect with two diagonal lines in a square visual field of 200 m200 m/(5.66100 m) (1)

A disc portion and a rim portion of a tire wheel are integrally formed simultaneously, with a resonance pipe formed between the disc and rim portions, by inserting a molten metal into a space formed by a mold combined with the resonance pipe by core pins.

The wheel is for a railway vehicle that travels on a rail. The wheel includes a wheel tread, a flange and a throat portion. The wheel tread is provided at an outer circumferential portion of the wheel. The wheel tread faces a head surface of the rail. The flange is provided at the outer circumferential portion of the wheel. The flange projects further outward than the wheel tread in the radial direction of the wheel. The throat portion connects the surface of the flange and the wheel tread. The throat portion has a protrusion. The protrusion projects to the rail side. The protrusion extends along the entire circumference of the throat portion.