Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF8 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com