CN2187191Y

CN2187191Y - Reinforced layer covered tongue

Info

Publication number: CN2187191Y
Application number: CN 93218323
Authority: CN
Inventors: 周怀军
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-07-14
Filing date: 1993-07-14
Publication date: 1995-01-11
Anticipated expiration: 2003-07-14

Abstract

The utility model relates to a tongue covered with reinforced layers, which is used for railway switches. The contact position of a tongue and a train wheel is covered with continuous or discontinuous reinforced layers, wherein the hardness of the reinforced layers is from HRC30 to 50, and the thickness of the reinforced layers can be from 0.4 to 4 millimeters. The reinforced layers and the covered tongue are combined tightly in the metallurgical state; the reinforced layers have high wear and fatigue resistance, and thus, the service life of the tongue can be increased by over three times. The utility model is simple, and can be operated by two persons so that the utility model has rapidity and time saving. The utility model can be made into a new tongue with various specifications, and can be used for repairing old tongues or waste covered tongues. The utility model can also be reformed on site, and the safety for railway transportation can be increased effectively.

Description

Reinforced layer covered tongue

The utility model relates to a kind of tongue that covers strengthening layer that supplies railway switch to use.

At present on the route of railway transportation, employed track switch majority is after selecting for use the common rail of different sizes such as 43Kg/M, 50Kg/M, 60Kg/M to shape, directly to be assembled into bifilar parallel straight line or the mobile track switch of curve.It is installed on the route, to realize changing traffic route in the train running.The condition of work of tongue and environment are very abominable, so the weak point of this tongue is: ubiquity tread side is easy to wearing and tearing, the tongue spalling of rail head, and diseases such as tongue fracture, especially thigh is even more serious on the curve; For guaranteeing traffic safety, then need often change, waste a large amount of steel, fund and manpower, and influence train and normally run; Although inspection, maintenance, operation that numerous railway servants are meticulous, it is also threatening traffic safety at any time, is one of important hidden danger factor of safe driving.

The purpose of this utility model is that a kind of improved tongue that covers strengthening layer will be provided, and it can realize the reinforcement to tongue effectively, improves it and utilizes function, improves safety of railway traffic.

The purpose of this utility model is achieved in that the contact site of tongue and train wheel, and being covered with hardness continuous or that be interrupted is the strengthening layer of HRC30-50, and its thickness can be one of them of 0.4-4 millimeter.

The advantage of utility model: strengthening layer and tongue are with the metallurgical state strong bonded, and its average strength can reach 40Kg/mm ², strengthening layer self has higher wear-resisting, fatigue durability, can improve tongue application life more than three times; Equipment is simple, and two people operation fast saves time; Can make the new tongue of each shape different size, the tongue that can repair old tongue or exceed standard and scrap can also be changed a social system simultaneously at the scene again, can improve safety of railway traffic effectively.

Description of drawings:

Fig. 1 is a kind of front view that covers the tongue (the straight shape in left side) of strengthening layer;

Fig. 2 is that the A of Fig. 1 is to view;

Fig. 3 is I-I sectional view of Fig. 1;

Fig. 4 is II-II sectional view of Fig. 1;

Fig. 5 is III-III sectional view of Fig. 1.

Below in conjunction with details and the working condition of Fig. 1-5 detailed description according to the concrete device that the utility model proposes.

This device comprises that the contact site of tongue 1 and it and train wheel is covered with continuously or its thickness that is interrupted is that 0.4-4 millimeter, hardness are the strengthening layer 2 of HRC30-50.

Specific embodiments, the difference situation is described as follows.

The new tongue of first system.Matrix is selected conventional rail for use, through shaping and being shaped on the pre-allowance that can satisfy strengthening layer 2 thickness in said contact site, promptly is tongue 1.Strengthening layer is to constitute like this, with oxy-acetylene flame surfacing mode, self-fluxing alloyed powder is carried out manual welding to the said contact site (contain and be shaped on pre-allowance part) of tongue.Self-fluxing alloyed powder can be selected Co-based alloy powder for use, it is the nickel (Ni) that contains carbon (C) 0.4-0.8, boron (B) 1.5-3.5, silicon (Si) 3.5-5.5, chromium (Cr) 5-16, iron (Fe) 8-14, molybdenum (Mo) 2-5 and surplus that its chemical composition is formed (weight %), and its fusing point is controlled at and carries out operation between 985-1100 ℃; Also can select for use iron(-)base powder to weld, it is the iron (Fe) that contains carbon (C) 0.5-1.0, boron (B) 1.0-4.0, silicon (Si) 2.5-4.0, chromium (Cr) 6-13, nickel (Ni) 29-37, molybdenum (Mo) 4-5 and surplus that its chemical composition is formed (weight %), and its fusing point processing temperature is adjusted between 1100-1150 ℃.Welding back all natural air cooling can be assembled into track switch or directly application to normal temperature.Although the solderability of rail steel is poor.By said suitable surfacing mode, can make strengthening layer and tongue strong bonded.Boride, carbide that is distributed with boride, the chromium of nickel in the strengthening layer etc. has the compound of higher hardness physical property, so the hardness of strengthening layer is easy to be controlled at HRC30-50 one of them.The coefficient of thermal expansion of strengthening layer is (14-16) * 10 ^-6Rice/Mi Du, the coefficient of thermal expansion of rail steel (being tongue 1) is (12.1-13.5) * 10 ^-6Rice/Mi Du is not difficult to find out, the coefficient of thermal expansion of strengthening layer, tongue is basic near consistent, can ensure that then strengthening layer can crackle not take place or comes off because of variations in temperature.Cover the strengthening layer tongue,, can begin, select suitable length to get final product, so the rail cross section that Fig. 5 represents for routine at length direction in tongue one end from most economical viewpoint.Junction plate 3 shown in the figure is a conventional criteria spare.

It two is old tongues of repairing wearing and tearing or exceeding standard and scrap because of wearing and tearing.This work majority is directly to carry out at the scene, basic condition as hereinbefore, institute's difference is the contact site to tongue and train wheel, need not to be processed with pre-allowance.After the cleaning of necessity, i.e. directly welding.Both resizing whereby can be realized coated with strengthening layer again.

It three is to repair the old tongue of scrapping because of spalling of rail head, fracture etc., and it is at first should thoroughly eliminate after the defective, implements coated with strengthening layer again.

Claims

1, a kind of tongue that covers strengthening layer that supplies railway switch to use, be combined into one by strengthening layer and tongue and form, the contact site that it is characterized in that tongue (1) and train wheel is covered with continuously or the hardness of being interrupted is the strengthening layer (2) of HRC30-50, and its thickness can be one of them of 0.4-4 millimeter.