Alloy nodular cast iron for railway vehicle brake disks

A technology of alloy balls and brake discs, applied in the field of brake disc materials and alloy ductile iron, which can solve the problems of unsatisfactory mechanical strength and thermal fatigue resistance of ordinary gray cast iron brake discs

Inactive Publication Date: 2015-07-15
BEIJING ZONGHENG ELECTROMECHANICAL TECH DEV +1
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

However, the mechanical strength and thermal fatigue resistance of ordinary gray cast iron brake discs are unsatisfactory

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0098] Table 1 and Table 2 show the composition of the alloyed nodular cast iron provided in Example 1 and Example 2 and the mechanical properties of the prepared brake disc.

[0099] Table 1. Brake disc chemical composition (wt.%)

[0100] element C Si mn Ni P S RE Mg Mo Cu Example 1 3.62 2.31 0.79 0.20 0.043 0.020 0.025 0.024 0.30 0.02 Example 2 3.70 2.55 0.68 0.36 0.039 0.018 0.034 0.038 0.57 0.043

[0101] Table 2 Mechanical performance parameters of the brake disc

[0102] project Tensile strength σb(MPa) Elongation after breaking δ(%) Hardness (HB) Example 1 608 8.1 215 Example 2 636 7.4 212

[0103] According to the content of table 1 and table 2 and test example, it can be seen that the brake disc made of the alloy ductile iron material provided by embodiment 1 and 2 has higher tensile strength, stronger wear resistance and abrasion resistance ability, anti-deformation ab...

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Abstract

The invention relates to an alloy nodular cast iron which comprises the following components in percentage by weight: 2.0-5.0% of carbon, 1.0-4.0% of silicon, 0.2-1.0% of manganese, 0.1-0.6% of nickel, 0.1-0.80% of molybdenum, 0.01-0.08% of copper, 0.01-0.08% of magnesium, 0.01-0.06% of rare-earth Re, and the balance of iron and inevitable impurities.

Description

technical field [0001] The invention relates to a brake disc material, in particular to an alloy ductile iron used for a rail vehicle brake disc, and belongs to the field of metal material metallurgy. Background technique [0002] The braking system is one of the key technologies of rail vehicles, which is directly related to the safety of train operation. At present, the braking system of rail vehicle adopts tread braking. In this braking mode, more than 90% of the heat is absorbed by the wheels during the braking process. Therefore, when the speed is relatively high, it is easy to cause high-temperature peeling or thermal cracks on the wheel tread; moreover, the noise of tread braking is relatively large. Therefore, this braking method is generally suitable for vehicles with a speed of less than 100km / h. [0003] In order to improve this situation, in the railway rolling stock exceeding 100km / h, the foundation brake device generally adopts disc brake. Since the brake d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C37/04C22C33/08
Inventor 李继山李和平韩晓辉焦标强吕宝佳顾磊磊陈德峰宋跃超
Owner BEIJING ZONGHENG ELECTROMECHANICAL TECH DEV
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