Method for coating steel rail with alloy by means of arc cladding

Abstract

The invention discloses a method for coating steel rail with alloy by means of arc cladding and belongs to the field of rail cladding. The method is characterized by comprising the following steps: (a) putting a steel rail cladding machine on the steel rail, moving an arc welding gun at a constant speed, and melting alloy at the upper portion of a to-be-coated position of a tread surface of the railhead of the steel rail; (b) controlling the width of an alloy strip to be 4 mm to 30 mm, and controlling the thickness of a heat affected zone of the steel rail to be 0.6 mm to 6 mm; and (c) arranging an induction heater above the melted alloy strip, stewing the alloy strip for 2 s to 180 s and then moving the induction heater at a constant speed along the length direction of the steel rail so as to perform heating, wherein the tissues in the heat affected zone of the steel rail after heating are considered as tempered sorbite or tempered sorbite + tempered troostite, or tempered troostite.According to the method disclosed by the invention, the cooling speed of the heat affected zone in a cladding process needs not to be controlled, the volume and weight of the steel rail cladding machine can be reduced, the cladding applicability and cladding efficiency can be improved, and the performances of the tissues in the heat affected zone after the steel rail is melted on site are ensuredto meet the use requirements of the steel rail.

Description

technical field [0001] The invention relates to the technical field of rail cladding, in particular to an alloy method for arc cladding of steel rails. Background technique [0002] The track circuit is an electrical circuit composed of two rails of the railway line as conductors, and the signal power supply and receiving equipment are connected with lead wires. In sections where trains rarely pass through for a long time, such as shunting lines, cargo lines, and special lines, the rail surface is severely oxidized and rusted. On, indicating that the track circuit has lost the function of checking the occupancy status of the track section. This phenomenon is called poor track circuit shunting. Cladding a layer of anti-rust and wear-resistant alloy belt on the rail head tread in the bad section of the track circuit, so that the wheel and the non-rust wear-resistant alloy belt can be effectively contacted, which can effectively eliminate the bad phenomenon of the track circu...

AI Technical Summary

Problems solved by technology

Cladding site construction is powered by a generator. If the power of the generator exceeds 40kw, the equipment is too heavy to be transported manually

The cladding moving speed is too slow, usually the cladding speed is 30-40m / h, and the section with poor branching is generally 60-100m / place, while the working time of the skylight is only 1h / day, and the construction of one bad branching section requires 2 -3 days, low construction efficiency and high cost

In northern my country and high-altitude areas, the temperature in winter is low, and the existing methods of cladding alloys are limited.

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