CN218932255U

CN218932255U - Rail surface plasma coating

Info

Publication number: CN218932255U
Application number: CN202223067367.4U
Authority: CN
Inventors: 赵佳; 陈丕志; 李鹏; 王东方; 张旭; 李扬; 魏宏伟; 李红侠; 汪吉健
Original assignee: China Railway Engineering Consulting Group Co Ltd
Current assignee: China Railway Engineering Consulting Group Co Ltd
Priority date: 2022-11-18
Filing date: 2022-11-18
Publication date: 2023-04-28
Anticipated expiration: 2032-11-18

Abstract

The utility model provides a rail surface plasma coating, which relates to the field of material surface engineering and comprises a rail surface plasma coating, wherein the rail surface plasma coating is arranged on a rail surface of a steel rail, and the end surface of the rail surface plasma coating, which is far away from the rail surface, is arc-shaped. The novel alloy material used for the plasma coating of the rail surface can improve the rust resistance and pollution resistance of the contact surface of the wheel on the steel rail by an advanced coating mode, and can effectively solve the rail branching adverse conditions caused by the conditions of rust, pollution and the like of the steel rail.

Description

Rail surface plasma coating

Technical Field

The utility model relates to the technical field of material surface engineering, in particular to a rail surface plasma coating.

Background

At present, main technologies for directly taking measures on the rail surface in China to solve the poor branching of a rail circuit include cladding overlaying, supersonic electric arc spraying, liquid coating, plasma coating and the like. The fusion overlaying needs to be operated on site, and the process is difficult to execute due to limited environment and operation conditions; the sand blasting process of arc spraying can generate a large amount of dust, sand is difficult to clean thoroughly, a coating is easy to oxidize, and the service life is low; although the service life of the liquid coating is greatly improved, the process and quality are not stable, the coating construction efficiency is low, and the coating is thin and has low service life. The plasma coating technology can greatly improve the bonding strength, rust resistance and wheel rolling resistance of the coating by designing the coating structure, selecting wires and the like, thereby prolonging the service life of the coating. The novel alloy material is used on the rail surface by a plasma coating technology, so that the rail branching failure caused by the conditions of rust, pollution and the like of the steel rail can be effectively solved.

Disclosure of Invention

The object of the present utility model is to provide a rail surface plasma coating to ameliorate the above problems. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

the application provides a rail face plasma coating, comprising: the rail surface plasma coating is arranged on the rail surface of the steel rail, and the end surface of the rail surface plasma coating, which is far away from the rail surface, is arc-shaped.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the arc radius of the rail surface plasma coating is more than or equal to 1000mm and less than or equal to 1500mm.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the cross section of the rail surface plasma coating is of a structure with a thin middle and thick two sides.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the cross section of the rail surface plasma coating is of a bilateral symmetry structure.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the thickness of the middle part of the rail surface plasma coating is more than or equal to 200 mu m and less than or equal to 250 mu m; the thickness of the two sides of the rail surface plasma coating is more than or equal to 250 mu m and less than or equal to 250 mu m.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the ratio of the width of the rail surface plasma coating to the width of the rail surface of the steel rail is more than or equal to 30% and less than or equal to 40%.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the width of the rail surface plasma coating is more than or equal to 20mm and less than or equal to 25mm.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the rail surface plasma plating coating is prepared from nickel-aluminum alloy.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the porosity of the rail surface plasma coating is less than or equal to 3 percent.

As a preferred embodiment of the rail surface plasma coating according to the utility model, the following applies: the particle size of the coating particles of the rail surface plasma coating is 117.1+/-57.7 mu m.

The beneficial effects of the utility model are as follows:

the rail surface plasma coating is arranged, the cross section of the rail surface plasma coating is of a structure with thin middle and thick two sides, and the rolling-resistant service life of the coating can be prolonged; the coating particles are larger, so that the bonding strength of the oxidized coating can be reduced; the coating uses alloy materials with higher material hardness, so that the wear resistance of the steel rail can be improved. The service life and the rust-proof period of the plasma coating on the rail surface are obviously improved, and the rolling resistance and the rust-proof period of the steel rail with the coating on the rail surface are obviously improved, so that the poor branching condition of a rail circuit can be effectively remedied.

Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the embodiments of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a track surface plasma coating according to an embodiment of the present utility model;

FIG. 2 is a schematic cross-sectional view of a rail face plasma coating according to an embodiment of the present utility model.

The marks in the figure: 1. coating the rail surface with a plasma coating; 2. a rail.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, in the description of the present utility model, the terms "first", "second", and the like are used only to distinguish the description, and are not to be construed as indicating or implying relative importance.

At present, main technologies for directly taking measures on the rail surface in China to solve the poor branching of a rail circuit include cladding overlaying, supersonic electric arc spraying, liquid coating, plasma coating and the like. The fusion overlaying needs to be operated on site, and because the environment and the operation conditions are limited, the process is difficult to execute, and particularly, the welded steel rail is easy to generate martensite and other harmful tissues, so that cracks are easy to generate in the steel rail, and the hidden danger of rail breakage accidents exists. The arc spraying not only can generate a large amount of dust and sand which are difficult to clean thoroughly, but also has the disadvantages of easy oxidation of the sprayed coating, poor bonding strength and too low service life. Although the service life of the liquid coating is greatly prolonged, the process and quality are unstable, the coating construction efficiency is too low, the construction of an opened line is very difficult, the coating is thinner, the rolling-resistant service life of the coating is lower, the coating is easy to rust, and the actual use requirement of the site cannot be completely met.

As shown in fig. 1 and 2, the present embodiment provides a rail surface plasma coating layer, the rail surface plasma coating layer 1 is disposed on the rail surface of the steel rail 2, and the end surface of the rail surface plasma coating layer 1 away from the rail surface is arc-shaped. The plasma coating technology is a technology for spraying metal powder or wire materials on the surface of the steel rail after melting by using plasma jet as a heat source, and the coating coated by the technology can increase the rust resistance and the wheel rolling resistance of the steel rail, thereby prolonging the service life of the steel rail, reducing the cost and reducing the safety accidents.

As shown in fig. 1 and 2, the arc radius of the rail surface plasma plating coat 1 is 1000mm or more and 1500mm or less. Meanwhile, the cross section of the rail surface plasma coating 1 is of a bilateral symmetry structure, the cross section of the rail surface plasma coating 1 is of a structure with a thin middle and two thick sides, and the rolling resistance of the coating can be improved by adopting the structure with the thin middle and the two thick sides, so that the rolling resistance service life of the steel rail is prolonged. In this embodiment, the thickness of the middle part of the rail surface plasma plating coat 1 is 200 μm or more and 250 μm or less; the thickness of the two sides of the rail surface plasma plating coating 1 is more than or equal to 250 μm and less than or equal to 250 μm.

As shown in fig. 1 and 2, the ratio of the width of the rail surface plasma coating 1 to the rail surface width of the steel rail 2 is 30% or more and 40% or less. Meanwhile, the width of the rail surface plasma coating 1 is more than or equal to 20mm and less than or equal to 25mm.

In the embodiment, the rail surface plasma coating 1 is prepared from nickel-aluminum alloy, the nickel-aluminum alloy has higher hardness than the conventional materials, the mechanical strength is high, and the bonding strength, the rust resistance and the wheel rolling resistance of the coating can be improved by using the nickel-aluminum alloy, so that the service life of the steel rail is prolonged. Meanwhile, the high temperature caused by heating cannot damage the steel rail structure, so that the requirements of bearing capacity and durability of the steel rail are met. The porosity of the rail surface plasma coating 1 is less than or equal to 3%, the porosity of the coating is smaller, and oxidation can be reduced, so that the bonding strength of the coating is improved. The particle size of the coating particles of the rail surface plasma coating 1 is 117.1+/-57.7 mu m, the particles of the coating are larger, and oxidation can be reduced, so that the bonding strength of the coating is improved.

The use of the rail surface plasma coating 1 in this embodiment can improve the service life and rust preventive period of the coating, and the effect of remedying the poor railway shunt can be greatly improved. The supersonic arc spraying coating resists rolling about 8000 wheel pairs, the rust-proof period is about one year, the liquid coating resists rolling about 30000 wheel pairs, the rust-proof period is about one year, and the plasma coating resists rolling about 80000 wheel pairs, and the rust-proof period is about three years.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims

1. A rail surface plasma coating comprising: the rail surface plasma coating (1) is arranged on the rail surface of the steel rail (2), and the end surface of the rail surface plasma coating (1) far away from the rail surface is arc-shaped.

2. The rail face plasma coating of claim 1, wherein: the arc radius of the rail surface plasma coating (1) is more than or equal to 1000mm and less than or equal to 1500mm.

3. The rail face plasma coating of claim 1, wherein: the cross section of the rail surface plasma coating (1) is of a structure with thin middle and thick two sides.

4. The rail face plasma coating of claim 1, wherein: the cross section of the rail surface plasma coating (1) is of a bilateral symmetry structure.

5. The rail face plasma coating of claim 1, wherein: the thickness of the middle part of the rail surface plasma coating layer (1) is more than or equal to 200 mu m and less than or equal to 250 mu m; the thickness of the two sides of the rail surface plasma coating layer (1) is more than or equal to 250 mu m and less than or equal to 250 mu m.

6. The rail face plasma coating of claim 1, wherein: the ratio of the width of the rail surface plasma coating (1) to the rail surface width of the steel rail (2) is more than or equal to 30% and less than or equal to 40%.

7. The rail face plasma coating of claim 1, wherein: the width of the rail surface plasma coating (1) is more than or equal to 20mm and less than or equal to 25mm.

8. The rail face plasma coating of claim 1, wherein: the rail surface plasma plating coating (1) is prepared from nickel-aluminum alloy.

9. The rail face plasma coating of claim 1, wherein: the porosity of the rail surface plasma coating (1) is less than or equal to 3 percent.

10. The rail face plasma coating of claim 1, wherein: the particle diameter of the coating particles of the rail surface plasma coating layer (1) is 117.1+/-57.7 mu m.