Axle material and application thereof in high-speed railway carriage

A technology of axle and mass percentage, which is applied in the field of materials, can solve the problems of axle pressing fatigue damage, failure to meet requirements, and failure to be effectively solved

Inactive Publication Date: 2012-10-31
TSINGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fatigue life of the axle is directly related to the material, manufacture, heat treatment and design method of the axle, especially the fatigue damage of the press-fit part of the axle has not been effectively solved
The yield strength of this axle steel is 420MPa, the tensile strength is 730MPa, and the fatigue limit is 249MPa. These properties can no longer meet the requirements of the growing high-speed railway passenger car for axle steel materials.

Method used

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  • Axle material and application thereof in high-speed railway carriage
  • Axle material and application thereof in high-speed railway carriage
  • Axle material and application thereof in high-speed railway carriage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Example 1: An axle material, calculated by mass fraction, includes: C: 0.30%, Si: 0.37%, Mn: 0.85%, P: 0.006%, S: 0.002%, Cr: 1.20%, Ni: 0.45%, Al: 0.005%, N: 0.0025%, Ca: 0.0020%, Cu: 0.035%, V: 0.079%, Mo: 0.20%, and the balance is Fe.

Embodiment 2

[0050] Embodiment 2: A kind of axle material, calculated by mass fraction, it includes: C: 0.25%, Si: 0.25%, Mn: 0.80%, P: 0.005%, S: 0.0023%, Cr: 0.95%, Ni: 0.30%, Al: 0.040%, N: 0.0047%, Ca: 0.0045%, V: 0.030%, Mo: 0.45%, and the balance is Fe.

Embodiment 3

[0051] Embodiment 3: A kind of axle material, calculated by mass fraction, it includes: C: 0.26%, Si: 0.45%, Mn: 0.75%, P: 0.0094%, S: 0.0038%, Cr: 1.05%, Ni: 0.50%, Al: 0.032%, N: 0.0052%, Ca: 0.0005%, Cu: 0.25%, V: 0.063%, Mo: 0.28%, and the balance is Fe.

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Abstract

The invention relates to an axle material. The influence of different proportions for which elements such as carbon, silicon, manganese, phosphorus, sulphur, chromium, molybdenum, nickel, copper and wolfram account, on material performances is studied, an alloy steel axle material which has good obdurability matching and a good fatigue property is obtained, preferably, the material is applied to production of railway carriage axles, particularly to the production of axles of railway carriages with a speed of more than 200km per hour, and the material also can be applied in high and cold areas.

Description

technical field [0001] The invention relates to the field of materials, in particular to an axle material for railway passenger cars, and further, an alloy steel axle material for high-speed railway passenger cars with a speed of more than 200km per hour. Background technique [0002] The operation safety of high-speed railway is a major basic engineering project involving the national economy and people's livelihood, and the axle is one of the key running components of high-speed trains. The quality of its comprehensive performance largely determines the long-term safety and service life of trains. The fatigue life of the axle is directly related to the material, manufacture, heat treatment and design method of the axle, especially the fatigue damage problem of the press-fit part of the axle has not been effectively solved. Axles for high-speed railway trains are usually produced internationally using two materials and process technologies. One technical idea is to use medi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/46
Inventor 朱静潘涛刘淑华王玉玲周惠华顾家琳李建民汝继来施惠基林吉忠王之香穆恩生钟虓龑
Owner TSINGHUA UNIV
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