Steel rail surface alloy layer welding method and its material
A surface welding and alloy layer technology, applied in the direction of welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of large damage to the rail, low bonding strength of the corrosion-resistant alloy layer, and low production efficiency, and achieve rail deformation And the effects of small welding stress, easy automation, and high melting efficiency
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[0053] Embodiment: The rail surface adopts NiCrBSiCu self-fluxing alloy powder to carry out resistance seam welding
[0054] Alloy powder powder rolling welding device see figure 2 , the composition of self-fluxing alloy powder is Cu10%, C 0.35%, B 2.4%, Si 2.5%, Cr6.5%, Fe 6.3%, Ni balance, powder particle size is -300 mesh ~ +800 mesh, the steel rail used Same comparison.
[0055] 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 alloy powder, load (30Kg) And move the roller elec...
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