Method for steel rail surface treatment by laminar plasma

Abstract

The invention discloses a method for steel rail surface treatment by laminar plasma, and relates to the technical field of steel rail remanufacturing treatment. The method adopts a non-transfer arc laminar plasma generator as a heat source; the non-transfer arc laminar plasma generator moves relatively in parallel at constant speed along the longitudinal axis of a steel rail; a wire and powder feeding device axially feeds powder along the center of the non-transfer arc laminar plasma generator to spray composite powder to the surface of the steel rail; and a cladding layer is formed after injection cladding by the non-transfer arc laminar plasma generator. The method adopts laminar arc plasma beam remanufacturing system equipment to perform the heat surface reinforcement treatment for rail junctions, steel rails, wheels and other rail vehicle parts; and treated materials are more obvious in surface hardness reinforcing effect, and greatly improve the wear resistance.

Description

technical field [0001] The invention relates to the technical field of rail rebuilding treatment, in particular to a method for using laminar flow plasma to treat the surface of the rail. Background technique [0002] With the high-speed and heavy-duty rail transit in my country, the operating conditions of railways are becoming increasingly harsh, which makes the stress state of railways and their accessories and rail locomotive parts worse, accelerates the failure rate, and shortens the service life. The production of main parts and accessories of rail vehicles is in short supply. The production capacity of domestic enterprises can no longer meet the demand of the market. Some rail vehicle parts and accessories still need to be imported; Most of them are steel castings, and the surface treatment process is very complicated. Once they fail, they can only be returned to the furnace for treatment, and the recycling of the remaining value cannot be realized. [0003] With the...

AI Technical Summary

Problems solved by technology

[0005] In the past two hundred years, the surface strengthening and repairing of rails, hubs, turnouts, locomotive bearings, wheels, axles and other related track components has always been a hot spot in the world. However, due to its high performance, high melting point and unique use characteristics , traditional technologies and emerging technologies in recent decades cannot be used for surface repair and strengthening

The world's major industrial powers, such as the United States, Russia, Germany, Russia and other countries, invest a lot of manpower and material resources in the research of railway remanufacturing technology every year, but still have not fundamentally solved this problem. For now, Russia has made some progress in the application of traditional plasma-enhanced wheels, and the United States and China Railway Research Institute have also made partial application progress in laser-enhanced track surfaces, but in terms of fundamental practical applications, this is still an unbroken world problem