High-strength thin band steel for cold forming and manufacturing method thereof
A manufacturing method and technology of thin strip steel, applied in the field of continuous casting process, can solve the problems of uneven structure, poor formability, high yield ratio, achieve uniform grain structure, reduce the thickness of oxide scale, reduce rolling effect of temperature
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[0105] see figure 1 , which shows the technological process of the present invention, molten steel is directly poured on a crystallization roller 5a, 5b and 5b which are relatively rotating and capable of rapid cooling through the ladle 1 through the ladle shroud 2, the tundish 3 and the flow distribution device 4 In the molten pool 7 surrounded by side sealing plate devices 6a, 6b, molten steel solidifies on the circumferential surface of the crystallization rollers 5a, 5b, and then forms a solidified shell, which gradually grows and then forms at the smallest gap between the two crystallization rollers (nip point). 1.5-3 mm thick cast strip 11 . The casting strip passes through the secondary cooling device 8 in the airtight chamber 10, and immediately sprays dry ice particles (solid CO 2 ), to control the cooling rate, so that the casting belt 11 is rapidly and uniformly cooled to below 1280°C. Then the cast strip is sent to the hot rolling mill 13 by swinging the guide p...
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