Production method of ultralong welding rail and production chain

Abstract

The invention discloses a production method and a production line for ultralong welded rails. The method has the technical scheme that the procedure of laser surface peening is added to the conventional production process of the ultralong welded rails so as to carry out the operation of laser surface peening on the full-length rails. A laser surface peening system is added to the conventional ultralong welded rail production line to form the ultralong welded rail production line which can produce high abrasion laser strengthening layers. When rail sections are caused to pass through a laser surface peening station, under high laser power, the operation of laser surface peening is simultaneously carried out on the treading face, the upper round angle and the lateral face of a single rail section by utilizing the method of high-speed movement or oscillatory scanning of double laser processing heads with high laser power according to a designed pattern, and finally, the spot, or rectilineal, or curve, or netty, or plane high abrasion and toughening layer with required width and depth can be obtained on the surface of the entire long welding rail. In the premise that the integral favorable obdurability of the rail is maintained, the invention greatly improves the surface abrasion resistance and the service life of the steel rail, reduces the rail replacement frequency, and meets the requirement of high-abrasive-resistance steel rails of high-speed and heavy-load railway trains.

Description

technical field [0001] The invention belongs to the technical field of railway special equipment, and in particular relates to a production method and equipment for super-long welded rails. The invention uses laser surface strengthening and toughening technology to carry out laser treatment on super-long welded rails, and the treated new rails can greatly improve the surface hardness and wear resistance, and at the same time, the overall strength and toughness of the rails can be basically unchanged, which can be greatly improved. Extend the life cycle of rails. Background technique [0002] Since the sixth major speed increase of the railway and the launch of the four-vertical and four-horizontal high-speed railway trunk line construction project, my country's railway transportation industry is developing in the direction of high speed, high axle load, large transport volume and high traffic density. As high-speed and heavy-duty trains have higher requirements on the runni...

AI Technical Summary

Problems solved by technology

Its main disadvantage is that martensite cannot appear on the surface of the rail, otherwise the fracture toughness of the rail will be greatly reduced, leading to accidents such as rail breakage during the service process, which seriously affects the safe operation of the railway

However, the immediate problem brought about by the welded super-long rails is that the complexity of replacing the rails increases, and the time-consuming and related costs will increase significantly

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