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Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment

A technology of ultrasonic shock and pulse treatment, applied in heat treatment furnaces, welding equipment, welding equipment, etc., can solve problems such as internal cracks, inclusions, porosity, low tensile ductility, etc., to reduce internal stress and optimize heat exchange The effect of exchanging with quality

Active Publication Date: 2008-08-27
UIT LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems associated with thermal flux welding include, but are not limited to, low tensile ductility, low impact toughness, coarse-grained dendritic microstructure, inclusions and porosity, occurrence of internal cracks, ease of crack propagation, porosity becoming severe Defects, sand ingress into welds, and fatigue failure

Method used

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  • Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment
  • Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment
  • Method of improving quality and reliability of welded rail joint properties by ultrasonic impact treatment

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Embodiment Construction

[0086] The present invention relates to the repair of parts of rails joined together by welding by reworking the welded joints using the Ultrasonic Impact Treatment (UIT) process before welding, during welding, after welding, or during repairing of the rails. improvements in the performance of the segment, such as heat or heat flux welding, such as thermite or copper heat welding, and welding processes such as arc welding, gas pressure welding, and flash welding, where reprocessing includes the use of ultrasonic An impact tool applies an ultrasonic impact treatment either manually or automatically, continuously or in batches, to treat a joint around a joint and / or a length of track for the purpose of improving fatigue life and / or other properties of welded track sections.

[0087] The ultrasonic shock treatment according to the invention results in a reduction, compensation and redistribution of the internal stresses and produces favorable compressive stresses in the welded joi...

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Abstract

A method for improving the performance of sections of rails joined together by welding by reworking welded joints utilizing an ultrasonic impact treatment (UIT) process either before welding, during welding, after welding or during repairs of used rails, including treatment of a joint, around a joint and / or length of a rail, in order to increasing fatigue life and / or other properties of welded rail sections is disclosed. The method provides reduction of stress defects and redistribution of internal stress patterns in the vicinity of weld seams of rails. The UIT provides periodic pulse energy impact treatment with surfaces in welded rails to induce internal compression waves inducing a metal plasticity state in the vicinity of the weld seam of the rail or in the rail itself .

Description

technical field [0001] The present invention relates to the use of ultrasonic impact treatment (UIT) process to rework welded joints before welding, during welding, after welding or during the repair process of worn rails. Improvements made to the performance of sections of rails, such as heat or flux welding, such as thermite or copper heat welding, and welding processes such as arc welding, gas pressure welding and flash welding, the re Machining includes the application of ultrasonic shock treatment by means of ultrasonic shock tools, either manually or automatically, continuously or in batches to treat the joint around the joint and / or a length of track, with the aim of improving the fatigue life and / or of the welded track sections or other properties. Background technique [0002] Tracks are used to provide a means of transportation for railroad and subway rolling stock, streetcars, locomotives, monorails, trams, and other moving, rotating, and rotating structures. Tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47J36/02
CPCB23K31/125B23K37/00C21D7/04C21D9/04C21D9/50C21D10/00E01B31/18B23K2101/26C21D11/00E01B29/00B23K20/10
Inventor E·S·斯塔尼科夫V·Y·科罗斯特尔V·维泰亚泽夫O·科罗尔科夫
Owner UIT LLC
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