Rare earth weathering steel rich in alloying rare earth elements and manufacturing method of rare earth weathering steel
A technology for alloying elements and rare earth elements, which is applied to rare earth weathering steel rich in alloying rare earth elements and its manufacturing field, can solve the problems of excessively strict P content requirements, increased process costs, increased smelting costs, etc., and achieves excellent technology. performance, enhanced corrosion resistance, the effect of excellent mechanical properties
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[0033] Embodiment: According to the composition requirements of the steel of the present invention, the manufacturing method of the economical rare earth weathering steel provided by the present invention, the smelting process includes converter blowing, LF refining, slab continuous casting, slab hot delivery, slab heating, control Rolling, controlled cooling, coiling and finishing. The steelmaking-continuous casting process includes hot metal desulfurization and slag removal pretreatment, top-bottom combined blowing converter blowing, tapping alloying, LF refining, and slab continuous casting. Desulfurization by spraying lime powder into the molten iron ladle, and then mechanically removing slag with a slag removal car, the temperature of the molten iron is ≥ 1300 ° C, and S ≤ 0.006%. After the converter is splashed with slag to protect the furnace, the shaking furnace is first loaded with scrap steel, and then mixed with molten iron. Converter blowing, removal of P and C, b...
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