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Method for melting and coating anti-rust wear-resistant alloy on steel rail surface

A technology of cladding alloys and wear-resistant alloys, applied in metal processing equipment, metal material coating technology, welding media, etc. Short service life and other issues to achieve the effect of guaranteed performance, strong directivity, and reduced residual stress

Active Publication Date: 2008-03-19
CHENGDU ZHONGGUI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical solutions disclosed above all have the following disadvantages: the bonding force between the alloy layer and the rail is not high, and the rail is prone to produce martensite or bainite during the spray welding process, causing cracks and fractures of the rail; and the alloy layer is too thin and wear-resistant Poor performance, peeling, shedding and other phenomena are found during use, and the service life is short

Method used

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  • Method for melting and coating anti-rust wear-resistant alloy on steel rail surface
  • Method for melting and coating anti-rust wear-resistant alloy on steel rail surface
  • Method for melting and coating anti-rust wear-resistant alloy on steel rail surface

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Effect test

Embodiment 1

[0040] A method for cladding the surface of a steel rail with an anti-rust and wear-resistant alloy, comprising the following steps:

[0041] A. Preheating, using super-audio frequency or intermediate frequency induction heating equipment to heat the part of the surface of the rail head 1 to be clad with alloy, the induction heater is arranged above the part of the surface of the rail head 1 to be clad with alloy, and the induction heater moves at a constant speed, Evenly heat the part of the surface of the rail head to be clad with alloy. The size of the preheating part is: width 50mm, length 250mm, and the preheating temperature is 290 ° C ~ 450 ° C;

[0042]B. Cladding: Plasma cladding or arc welding is used to clad the alloy on the surface of the rail head 1, the induction heater moves at a constant speed, and the plasma cladding or arc welding equipment also moves at a constant speed; when the preheating temperature is 290 ° C ~ 450°C, when the welding torch of the plasma...

Embodiment 2

[0046] The more optimized cladding alloy method of the present invention is as follows:

[0047] A. Grooving, machining the cladding groove 2 on the surface of the rail head 1;

[0048] B. Magnetic particle flaw detection, using magnetic particle flaw detection equipment to detect flaws in the surface of the rail head 1, the mechanically processed cladding groove 2, and check whether there are cracks, pores, inclusions and other defects in the cladding groove 2;

[0049] C. To clean the surface, first use a brush to clean the magnetic powder, and then use a cleaning agent to clean the oil on the 2 parts of the cladding tank;

[0050] D. Preheating, using super-audio frequency or intermediate frequency induction heating equipment to heat the surface cladding groove 2 of the rail head 1, the induction heater is arranged above the surface cladding groove 2 of the rail head 1, and the induction heating equipment moves at a constant speed, Evenly heat the 2 parts of the cladding t...

Embodiment 3

[0061] There are several methods for cladding alloy on the surface of the rail head 1 as follows:

[0062] (1) Oxygen-acetylene flame surfacing welding

[0063] (2) resistance welding

[0064] (3) arc welding

[0065] (4) Plasma cladding

[0066] (5) Laser cladding

[0067] The invention adopts plasma cladding and arc welding cladding alloy, and its advantages are: high energy density, high arc temperature, energy concentration, stable process, good performance, strong directivity, little interference from external factors, sufficient alloy melting, cladding alloy layer 3 Strong bonding force with the substrate; the shape and size of the cladding alloy layer 3 can be precisely controlled, especially thin-layer welding is difficult to achieve, and spraying is even more difficult to control; the cladding dilution rate is low, so that the performance of the alloy powder can be fully guaranteed, and the flame welding is very easy Difficult to achieve; small thermal impact, sma...

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Abstract

The present invention discloses a method for smelting rust preventing and wear resistant alloy on the surface of a steel rail. The position needing alloy smelting on the surface of the steel rail head is heated by supersonic frequency or medium frequency induction-heating equipment, the induction heater is arranged above the position needing alloy smelting on the surface of the steel rail head, and the preheating temperature is 290-450 DEG C; the alloy is smelted on the surface of the steel rail head by using plasma smelting or arc welding smelting, when the preheating temperature is 290-450 DEG C, and the welding gun of plasma build up welding or arc welding equipment is moved to the position needing alloy smelting, the alloy powder, the alloy electrode or the alloy welding wire are automatically smelted; the railroad steel rail adopting the present invention can ensure that the train wheels and the rust preventing and wear resistant alloy layer are always in a contacting and compacting state, thereby the rail circuit works normally, and the white light zone phenomenon is completely eliminated; the cracking and breaking phenomena of the steel rail do not occur, the smelted alloy has good rust preventing and wear resistant properties, high bonding strength with the steel rail, and long service life.

Description

technical field [0001] The invention belongs to the field of metal material surface cladding and railway track circuit signal control. Background technique [0002] The rails of the railway are laid in the open air. Affected by weather conditions such as rain, sunlight, and temperature difference between day and night, a layer of iron oxide layer, that is, rust, will form on the surface of the rails. Especially on the rails of the auxiliary roads in the station and other trains that seldom pass, the surface corrosion is particularly serious. Rails are the conductors through which traffic signals are transmitted to the traction locomotive or to the control room. On the rails without rust, when the train is running in the signal section of the track circuit, the train wheels are in contact with the track, and the track circuit shows that the train occupies the track; but on the heavily rusted rails, due to the serious corrosion, the track circuit shows idle The wrong signal,...

Claims

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Application Information

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IPC IPC(8): C23C24/10B23K9/04B23K10/00B23K35/22
Inventor 周厚全曾耀新侯雷达
Owner CHENGDU ZHONGGUI TECH CO LTD
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