Wide steel strip for paper cutting blade and manufacturing method thereof
A wide-width steel and steel strip technology, which is applied to the wide-width steel strip for paper cutting blades and its manufacturing field, can solve the problems of low limit temperature, low precision, insufficient spheroidization rate, etc., achieve broad development prospects and ensure thickness accuracy. , the effect of high slitting precision
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[0065] Embodiment 1 (45Mn-2B):
[0066] (1) Preparation of converter steelmaking continuous casting billet:
[0067] The molten steel is rotated by the turntable and injected into the tundish, and then injected into the continuous casting billet mold by double nozzles, and the continuous casting billet of 220*1250*2500mm is continuously cast; the chemical composition of the molten steel is shown in the following table:
[0068] serial number
[0069] (2) Hot rolling:
[0070] The continuous casting billet obtained in step (1) is transported to a heating furnace through a roller table and heated to 1100±50° C., undergoes high-pressure water dephosphorization and 13 passes of rolling, and is cooled by a laminar cooling system to make a hot-rolled steel strip. , the hot rolling rolling temperature is 1150±30°C, the finishing rolling final rolling temperature is 890±20°C, and the final rolling coiling temperature is 620±20°C;
[0071] The finishing temperature of hot r...
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