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Steel rail surface alloy layer welding method and its material

A technology of surface welding and alloy layer, applied in welding medium, welding equipment, welding equipment, etc., can solve the problems of low production efficiency, large rail damage, low bonding strength of corrosion-resistant alloy layer, etc., and achieve low rail deformation and welding stress. , good conductivity, easy to automate

Inactive Publication Date: 2008-11-12
阴生毅
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The object of the present invention is to propose a new method for the problems of low bonding strength, large damage to the rail and low production efficiency in the preparation of the corrosion-resistant alloy layer on the surface of the rail in the technical field of metal material welding and railway signal control. Methods and special materials matching this method to solve this problem

Method used

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  • Steel rail surface alloy layer welding method and its material
  • Steel rail surface alloy layer welding method and its material

Examples

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Embodiment

[0052] Embodiment: the surface of the rail adopts NiCrBSiCu self-fluxing alloy powder to carry out resistance rolling welding alloy powder powder rolling welding device see figure 2 , the composition of the self-fluxing alloy powder is Cu10%, C0.35%, B2.4%, Si2.5%, Cr6.5%, Fe6.3%, the remainder of Ni, and the powder particle size is -300 mesh to +800 mesh , the rails used are the same as those in the comparative example.

[0053] The welding process is as follows: Use an emery cloth wheel to grind the surface of the rail to be welded and the ground wire to expose the metallic luster, and then connect the ground wire of the resistance welding pulse power supply to the rail tightly; use absolute alcohol to mix the NiCrBSiCu special alloy powder into a paste shape, and then use a brush to coat the paste powder on the fresh surface of the rail, the width of the powder layer is 3mm, and the thickness is 0.25-0.30mm; press the roller electrode 3 (width 5mm) on the self-fluxing allo...

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Abstract

The invention discloses a self-melting alloy powder material in the metal welding and railway signal control method, which comprises the following steps: polishing the railway surface to obtain fresh metal surface; proceeding resistance seam welding through resistance seam welding equipment; producing the needed alloy; coating alloy powder on the metal surface at 1000-1130 deg C fusing point. The powder displays NiCrBSi system self-melting alloy powder or NiCrBSiCu alloy system with HRC20-HRC45 welding layer hardness. The weight percentage of NiCrBSiCu alloy system is 0.2-0.5 percent C, 0.5-5.0 percent B, 1.0-5.0 percent Si, 3.0-15 percent Cr, 2-12 percent Fe, 3-20 percent Cu and Ni. The invention improves the bonding surface of metal and steel, which solves the problem of big rail damage and low production efficiency.

Description

technical field [0001] The invention discloses a method for welding an alloy layer on the surface of a rail and its material, belonging to the technical fields of metal material welding and railway signal control. Background technique [0002] In railway traffic control, whether two rails form a short circuit is often used to judge whether there is a vehicle staying on the rail or whether there is a vehicle passing. However, due to the long-term corrosion of some less-used steel rails, a layer of non-conductive rust layer is formed on the surface. Once there is a thick non-conductive rust layer on the surface of the rail, when the train is pressed on the rail or passes through the rail, the normal rail-wheel-axle-rail short circuit (good conductivity) signal is often not detected. This situation of no short-circuit signal is easily misjudged as no train stopping or no train passing on the rail. If run into the situation that two trains cross and meet at the intersection, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K11/06B23K11/34B23K35/30
Inventor 阴生毅张建忠
Owner 阴生毅
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