Hot rolling alloy steel for train brake disc

Abstract

The invention discloses hot rolling alloy steel for a train brake disc. The hot rolling alloy steel comprises C, Si, Mn, Cr, N, Mo, V and Fe. C, Si, Mn, Cr, Ni, Mo and V are evenly doped and distributed in a steel base body according to the specific proportion, and the abrasion resistance of a material is greatly improved while the mechanical performance of the material is guaranteed. The material has good forming performance, the braking disc close to the final shape can be prepared, and later machining of a traditional preparing method is reduced. By means of control over the content range of C and Mn, the material cooling speed is increased, and the material strength and surface hardness are improved.

Description

Technical field [0001] The invention belongs to the field of metallurgy, and designs a hot-rolled alloy. Background technique [0002] When the train brake disc is working, it needs to withstand periodic alternating stress, high vibration, and corrosion from acid media. At the same time, it is under severe working conditions with intense friction. Therefore, the material selection should be appropriate, the material requirements should be high, the mechanical properties should meet the requirements, and the hardness should be high and uniform to ensure its reliable operation. [0003] In the existing hot-rolled alloy materials for train brake discs, casting defects often occur after the casting is completed, and repairing methods are usually used to remedy them. However, due to the differences between the repaired materials and the raw materials, the repaired parts will appear Microscopic cracks will break due to fatigue during long-term use. The train brake discs produced by the...

AI Technical Summary

Problems solved by technology

[0003] In the existing hot-rolled alloy materials for train brake discs, casting defects often occur after the casting is completed, and repairs are usually used to remedy them. However, due to the differences between the repaired materials and the raw materials, the repaired parts will appear Microscopic cracks, which will break due to fatigue during long-term use

There is another deficiency in the train brake disc produced by the prior art, that is, the hardness distribution is uneven, and local wear and tear will often occur seriously, which will also affect the service life of the train brake disc

Images