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Laser Strengthening Method for Train Axle Combination

A technology of laser intensification and combined laser, which is applied in laser welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of axle service life and reliability to be improved, strengthening without considering the consistency of damage mechanism, and insufficient consideration of wear-resistant mechanism, etc. , to achieve the effect of improving safety and reliability, improving service life and increasing life

Inactive Publication Date: 2016-06-15
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (1) Only strengthen a certain part of the axle, so that the "weakest part" of the axle is relocated. Limited by the performance of the new "weakest part", the strengthening effect is limited
[0007] (2) The strengthening of the interference fit part of the axle does not consider the consistency with the damage mechanism, the wear resistance mechanism is not considered enough, and the service life and reliability of the axle still need to be improved

Method used

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Examples

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Embodiment

[0020] The invention discloses a laser strengthening method for a train axle combination, which comprises the following steps: performing laser strengthening on the interference fit part of the axle and performing laser strengthening on the non-interference fit part of the axle.

[0021] In this embodiment, the strengthening depth of laser strengthening for the non-interference fit parts of the axle should make the life of the non-interference fit parts after strengthening ≥ the service life of the axle; The strengthening depth of the non-interference fit part of the axle shaft for laser strengthening should meet: the life of the axle interference fit part after strengthening ≥ the life of the non-interference fit part after strengthening; the strengthening depth mentioned is the phase change of the surface structure of the material after laser strengthening Thickness, that is, the distance from the interface between the phase change structure and the matrix structure to the su...

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Abstract

The invention provides a train axle combined laser reinforcement method. According to the invention, axle interference fit parts are subjected to laser reinforcement, and axle non-interference fit parts are also subjected to laser reinforcement. With the method provided by the invention, reinforcement lives of axle interference fit parts match those of axle non-interference fit parts, axle service life is long, and axle reliability is high.

Description

technical field [0001] The invention relates to the technical field of train parts and laser processing tissues. Background technique [0002] Axle is a key component related to the reliability and safety of train service. It is assembled with wheels, bearings and other components. Under the impact force of complex wheel-rail rolling contact, its non-interference fit parts will experience fatigue due to complex rotation and bending. Accumulated damage, and the interference fit parts will suffer from fatigue and wear composite damage due to rotational bending fatigue and fretting fatigue. At the same time, in order to improve the comprehensive running performance of the train, strict requirements of low quality, long life, high reliability and safety are put forward for the axle. [0003] The existing world axle manufacturing technology is based on the base material axle technology. The materials mainly include high-quality carbon steel and high-quality low-alloy steel. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C21D1/09C21D10/00B23K26/00
Inventor 赵永翔堵彬斌胡基士
Owner SOUTHWEST JIAOTONG UNIV
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