Brake disc of high-speed train

Abstract

The invention discloses a brake disc of a high-speed train. The brake disc is provided with a disc body with a center hole. The disc body is provided with a friction surface and an inner side surface positioned on the back of the friction surface, a plurality of mounting holes are uniformly distributed on the disc body, a plurality of first radial platy radiating ribs, a plurality of second radial platy radiating ribs and a plurality of bosses are integrally forged on the inner side surface of the disc body, side surfaces of the first radial platy radiating ribs, side surfaces of the second radial platy radiating ribs and side surfaces of the bosses have draft angles, the mounting holes penetrate through the second radial platy radiating ribs, and radial keyways are arranged on the bosses. The brake disc is good in radiating effect, simple in forging forming and high in strength.

Description

technical field [0001] The invention relates to a train braking device, in particular to a high-speed train brake disc and an alloy material for preparing the high-speed train brake disc. Background technique [0002] At present, disc brake devices have been widely used on ordinary trains and high-speed EMUs with speeds above 160km / h, and disc brake systems have also been used on urban rail trains with speeds exceeding 100km / h, so the disc brake system has been vigorously developed The disc brake system will be a trend; the disc brake system mainly relies on the friction between the brake disc and the friction material to convert kinetic energy into heat energy and dissipate it into the air, so as to realize the parking brake of the vehicle. [0003] The brake discs used on high-speed trains are mainly divided into two types. One is the forged steel brake disc for CRH2 EMU. Bolts fasten the brake disc to the wheel or hub. The forged steel brake disc with this structure is o...

AI Technical Summary

Problems solved by technology

[0005] (1) The composition matching of the existing alloy forged steel is not reasonable, and the composition is not easy to control during the smelting process, and the comprehensive mechanical properties are not very ideal

For example, the patent application with the publication number CN1385628A titled "A Material for High-speed Train Brake Disc" (the closest prior art) added chromium, molybdenum , vanadium and other alloy components, but chromium, molybdenum and other alloy components bring about a significant decrease in material plasticity and toughness while increasing the material strength; similarly, although vanadium can refine grains and improve strength, vanadium is easy to oxidize, As a result, its composition is not easy to control during the smelting process, and if it is added too much, it is often easy to disperse unevenly, and it is easy to cause brittleness of the material; in addition, the addition of vanadium will also bring about a decline in the low-temperature impact toughness of the material, affecting the material’s toughness. Temperature adaptability, resulting in reduced braking performance of trains in some cold regions or low temperature seasons

[0006] (2) The heat treatment method of quenching and tempering for the existing alloy forged steel is unreasonable, and the performance of the material cannot be fully further optimized and improved; the resulting brake disc is prone to deformation and cracks, which affects braking Disk life

[0007] (3) Alloy forged steel for forged steel brake discs of high-speed trains in China mainly relies on imports, and the price is expensive

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