Cold-rolled steel strip for flux-cored wire and production method of cold-rolled steel strip
A technology of flux-cored welding wire and cold-rolled strip steel, applied in the field of cold-rolled strip steel, can solve the problems of poor matching of strength and plasticity, poor processing and forming performance, etc., and achieve excellent comprehensive performance, good processing and forming performance, and fast movement speed Effect
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[0023] Below in conjunction with embodiment 1-4, the present invention is further described, see table 1.
[0024] Table 1 Example 1-4 chemical composition (% by weight), the balance is Fe and unavoidable impurities.
[0025]
[0026] According to the requirements of the steel composition design of the present invention, pre-desulfurization of molten iron is adopted, combined top-bottom blowing of converter, refining in RH furnace, and the pure degassing time is guaranteed to be greater than 8 minutes. Cast into 210mm thick continuous casting slab.
[0027] The specific process steps are: hot metal desulfurization pretreatment, slag removal, converter smelting, RH furnace refining, continuous casting.
[0028] After the continuous casting slab is reheated by the heating furnace, it is rolled on the continuous hot rolling mill. The process control is shown in Table 2. After the controlled rolling in the recrystallization zone and the non-recrystallization zone , controlled...
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