Low-carbon peritectic steel continuous casting round billet for high-pressure boiler and manufacturing method of low-carbon peritectic steel continuous casting round billet
A technology for continuous casting of round billets and high-pressure boilers, applied in the field of iron and steel production, can solve the problems of easy formation of cracks and depressions, uneven thickness of the billet shell, and high manufacturing costs, so as to improve surface quality, improve internal quality, enhance competitiveness and effect of benefit
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[0022] A method for manufacturing a low-carbon peritectic steel continuous casting round slab for a high-pressure boiler provided in the following embodiments, comprising:
[0023] (1) Smelting process
[0024] EAF smelting process: the amount of molten iron in each furnace is 50-60 tons, the carbon at the end point of the electric furnace is controlled to be ≥0.08%, the phosphorus at the end point is ≤0.015%, the oxygen content of the tapping is controlled below 350ppm, the tapping temperature is 1620-1670°C, and the eccentric furnace bottom is adopted No slag tapping, no slag tapping;
[0025] LF refining process: the total refining time is 40-70 minutes; according to the refining slag condition or the sulfur content in molten steel, active lime is appropriately added;
[0026] Use deoxidizing slagging agent for diffusion deoxidation; feed pure calcium rod cored wire before vacuuming;
[0027] Diffusion deoxidation with deoxidation slagging agent, etc., refining time is 40...
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