Low-temperature continuous-annealing interstitial-free atom cold-rolled steel plate and production method thereof
An interstitial-free, cold-rolled steel sheet technology, applied in the field of iron-based alloys, can solve the problems of rib formation, increased annealing furnace construction, maintenance costs, energy consumption, and high recrystallization temperature
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[0048] The low-temperature continuous annealing interstitial-free cold-rolled steel sheet of this specific embodiment is divided into four embodiments according to its composition and content. The composition and mass percentage content of the cold-rolled steel sheet of the four embodiments are shown in Table 1:
[0049] Composition and mass percentage content during table 1 cold-rolled steel plate steelmaking
[0050]
[0051] The production methods of cold-rolled steel sheets in the four embodiments of this specific embodiment include a steelmaking process, a hot rolling process, a cold rolling process and a continuous annealing process.
[0052] The steelmaking process includes: pre-desulfurization of molten iron, combined top-bottom blowing of converter, heating of LF furnace and ensuring bottom-blown Ar stirring time of more than 5 minutes, vacuum cycle degassing treatment of RH furnace, ensuring pure RH degassing time of more than 15 minutes, Then low-carbon steel mol...
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