AXLE FOR RAIL VEHICLES

Abstract

Axle for rail vehicles, made of heat-treated material, wherein in all cylindrical parts (2a) and the transitional parts (2b) along the entire length (L) of the axle (1) surface the axle (1) surface is formed by a reinforced, inductively hardened layer (2) having of uniform depth from the axle (1) surface and this inductively hardened layer (2) continues with a transition layer (3) with a gradually decreasing gradient of reinforcing. Transition layer (3) depth is equal to at least 1.5 times of the depth of the inductively hardened layer (2).

Claims

1. An axle for rail vehicles, preferably for the railway ones, the axle being made of heat-treated material, wherein in all cylindrical parts and the transitional parts along the entire length of the axle surface the axle surface is formed by a reinforced, inductively hardened layer having of uniform depth from the axle surface and this inductively hardened layer continues with a transition layer with a gradually decreasing gradient of reinforcing.

2. The axle for rail vehicles of claim 1, wherein the transition layer depth is equal to at least 1.5 times of the depth of the inductively hardened layer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIGS. 1 and 2 shows an embodiment of the axle with a inductively hardened layer over the full surface length of an axle for rail vehicles.

EXAMPLES OF EMBODIMENTS OF THE INVENTION

Example 1

[0014] An exemplary embodiment of a conventional axle with an inductively hardened layer over the entire length of the axle surface of an axle for rail vehicles according to FIG. 1 comprises a surface of an axle 1, an inductively hardened layer 2, and a transitional layer 3, all of them along the entire length L of the axle 1 surface. In all cylindrical portions 2a, in the region of the seat, the axle body, the journal and the seat for a sealing ring, and in the transitional portions 2b, and in the to it adjoining transitional layer 3, the inductively hardened layer 2 consists of a gradually decreasing gradient of reinforcing. The inductively hardened layer 2 has a uniform depth along the entire length L of the axle 1 protective surface. The transition layer 3 has a depth equal to at least 1.5 times of the depth of the inductively hardened layer 2.

Example 2

[0015] An exemplary embodiment of a conventional axle with an inductively hardened layer along the entire length of the axle surface of an axle for rail vehicles according to FIG. 2 consists of the axle 1 surface, of the inductively hardened layer 2, and of the transition layer 3, wherein, all of them are extending along the entire length L of the surface of the axle 1. The inductively hardened layer 2 consists in all cylindrical portions 2a, in the region of the seat, the axle body, the journals, and the seat of the sealing ring, in the transition parts 2b, and in the complete zone for mounting of the driving gear-box 2c, and in the adjoining transition layer 3, of a gradually decreasing gradient of reinforcing. The inductively hardened layer 2 has a uniform depth along the entire length L of the axle 1 protective surface. The transition layer 3 has a depth equal to at least 1.5 times of the depth of the inductively hardened layer 2.

INDUSTRIAL USE

[0016] The above-disclosed solution of the inductively hardened layer over its entire length and parts is intended for use in all models of rail vehicles, especially for heavily stressed rail vehicles and for high-speed rail vehicles with high annual mileage representing millions of load cycles.