A Laser Additive Repair Method for Surface Defects of Alloy Steel Rail

A laser additive and repair method technology, applied in the direction of additive processing, additive manufacturing, etc., can solve the problems of prone to wear or damage, frog failure, etc., achieve the effects of small deformation, prevent cracking, and reduce temperature gradient

Active Publication Date: 2021-07-09
北京煜鼎增材制造研究院股份有限公司
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  • Description
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Problems solved by technology

[0002] Fixed frogs of railway turnouts are subjected to the impact and wear of wheel sets, and the wheel-rail force transition areas of the center rail and wing rail are prone to wear or damage locally, which will lead to the failure of frogs

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  • A Laser Additive Repair Method for Surface Defects of Alloy Steel Rail
  • A Laser Additive Repair Method for Surface Defects of Alloy Steel Rail
  • A Laser Additive Repair Method for Surface Defects of Alloy Steel Rail

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Embodiment Construction

[0032] The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.

[0033] The invention provides a technical proposal of a laser additive repair method suitable for surface defects of alloy steel rails, and the specifically selected alloy steel rails are fixed frog core rails.

[0034] Such as figure 1 As shown, the repair method in the present invention is specifically realized through the following steps:

[0035] First of all, quantitatively evaluate the damage degree of the fixed frog core rail as the basis for the judgment of the repair feasibility and the selection of the repair plan (see Figure 2). Specifically, for the single damage of the fixed frog core rail , first calculate and judge whether the ratio of the maximum depth of the area to be repaired and the theoretical thickness of the part in the direction of the maximum depth does not exceed 1 / 3; at the s...

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Abstract

The invention discloses a laser additive repair method for surface defects of alloy steel rails, which is characterized in that it includes the following steps: quantitatively evaluating the damage degree of alloy steel rails, and determining the repairability of the rails; for available laser additive repair, Determine the appropriate repair plan according to the degree of damage; carry out groove processing on the damaged part of the alloy steel rail or perform regional / integral removal of the damaged surface to ensure that the damage is completely removed before performing breach processing; fix the rail on the processing machine and preheating; use laser additive manufacturing technology for repair processing. Based on the damage form of the fixed frog core rail, the present invention proposes a special method for the fixed frog core rail from the aspects of repair feasibility, scheme selection, pre-treatment, preheating scheme, repair process parameter selection, post-treatment, etc. The laser additive manufacturing repair method can better guide the completion of the laser repair work of the fixed frog rail, and has strong operability and practicability.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing, in particular to a laser additive repair method for surface defects of alloy steel rails, especially a laser additive repair method for fixed-type frog core rails of railway turnouts. Background technique [0002] Fixed frogs of railway turnouts bear the impact and wear of wheel sets, and the wheel-rail force transition areas of the core rail and wing rail are prone to wear or damage locally, which will lead to the failure of frogs. Usually, when the frog fails, the core rail is severely damaged locally in the wheel-rail force transition area, while other parts still maintain good structure and performance. Repairing the fixed frog, especially the core rail part, can greatly extend its in-rail use Lifespan, full utilization of waste, has significant economic and social benefits. [0003] Laser additive manufacturing technology can use laser to deposit powder layer by layer i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/08B22F10/28B22F10/31B22F12/00B22F12/10B33Y10/00B33Y30/00B33Y40/00B33Y50/02
CPCB22F7/062B22F2007/068B33Y10/00B33Y30/00B33Y40/00B33Y50/02
Inventor 钱婷婷陈博
Owner 北京煜鼎增材制造研究院股份有限公司
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