Split-type train brake disc

Abstract

The invention discloses a split-type train brake disc which comprises a circular-ring-type disc body formed by assembling a first disc block and a second disc block; when the first disc block and the second disc block are assembled and connected, a first radial protrusion is positioned in a second radial groove; a second radial protrusion is positioned in a first radial groove; the first radial protrusion and the second radial groove are provided with communicated pin holes and / or the second radial protrusion and the first radial groove have communicated pin holes, and correspondingly, pin shafts pass through the corresponding pin holes on the first radial protrusion and the second radial groove and / or pin shafts pass through the corresponding pin holes on the second radial protrusion and the first radial groove. The split-type train brake disc provided by the invention is simple in connecting structure, and is convenient to position.

Description

technical field [0001] The invention relates to a train braking device, in particular to a split train brake disc and an alloy material for preparing the split train brake disc. Background technique [0002] With the vigorous development of railway technology and the continuous improvement of train running speed, the application of disc brakes has become the first choice for the current basic braking method of trains. The only means of braking for personal safety. 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 extensive application of the disc brake system will inevitably bring about problems such as replacement and maintenance of the brake disc in the brake system. It will be very cumbersome and harmful to the wheel if the wheel or the hub needs to be returned every time the brake dis...

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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