Weather-resistant submerged arc welding wire for free-coating weather-resistant steel bridge
A technology of submerged arc welding wire and weather-resistant steel, which is applied in the direction of arc welding equipment, welding medium, welding equipment, etc., can solve the problems of poor weather resistance, etc., and achieve the effects of uniform droplet transfer, good molten pool fluidity, and good process performance
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[0032] The invention provides a weather-resistant submerged-arc welding wire for a weather-resistant steel bridge without coating. The chemical composition distribution example is shown in Table 1. According to the accurately calculated welding wire composition distribution ratio, raw materials with low P, S, gas and inclusion content are selected. Calculate the amount of alloy added, use a 50Kg vacuum induction furnace to smelt the steel for welding wire, after charging, melting, and refining, add active element alloys such as Ca and Re in the alloying stage, and cast it into steel ingots after the composition is qualified. After the steel ingot is forged into a billet, it is rolled into a Φ5.5mm wire rod. After the wire rod is shelled, cleaned, electrolytic pickling, cleaned and boronized, it is then rough-drawn and fine-drawn to make a Φ2.0-5.0mm wire rod. Welding wire, the quality of welding wire is stable, and the electroless copper plating method is used to plate copper o...
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