Low-carbon phosphorus-added high-yield-strength cold rolled steel sheet and manufacturing method thereof
A cold-rolled steel plate and manufacturing method technology, applied in the directions of temperature control, manufacturing converter, rolling force/roll gap control, etc., can solve the problems of insignificant precipitation strengthening effect, increase of process cost, increase of refining process, etc., and achieve production The effect of low cost, low production cost and huge market prospect
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Embodiment 1
[0028] Example 1: The composition of the steel plate is: C: 0.03, Si: 0.25, Mn: 0.40, P: 0.10, S: 0.010, Als: 0.07, and the balance is Fe and unavoidable impurities.
[0029] Manufacturing method:
[0030] Desulfurization of molten iron is combined blowing in a converter, adding an appropriate amount of medium-carbon ferromanganese, ferrosilicon and ferrophosphorus for alloying treatment, controlling the weight percentage of Mn in the finished steel to 0.40%, and the weight percentage of P to 0.10%. After argon continuous casting, the thickness of the continuous casting billet is 250mm, and then hot rolling is carried out. The final rolling temperature of the hot rolling process is controlled at 870-890°C. ℃, the steel plate thickness is controlled to be 2.8mm during hot continuous rolling. Rinse with clean water after pickling with 10% dilute hydrochloric acid. During continuous cold rolling, the total reduction rate is controlled to be 64%, and the finished steel plate is ...
Embodiment 2
[0033] The composition of the steel plate is C: 0.07, Si: 0.10, Mn: 0.70, P: 0.06, S: 0.010, Als: 0.03, and the balance is Fe and unavoidable impurities.
[0034] Manufacturing method:
[0035]Desulfurization of molten iron is combined blowing in a converter, and an appropriate amount of medium-carbon ferromanganese, ferrosilicon and ferrophosphorus are added for alloying treatment. The weight percentage of Mn in the finished steel is controlled to be 0.70%, and the weight percentage of P is 0.06%. After argon continuous casting, the thickness of the continuous casting billet is 250mm, and then hot rolling is carried out. The final rolling temperature of the hot rolling process is controlled at 880-900°C. ℃, the steel plate thickness is controlled to be 5.5mm during hot continuous rolling. Rinse with clean water after pickling with 10% dilute hydrochloric acid. During continuous cold rolling, the total reduction rate is controlled to be 60%, and the finished steel plate is 2...
Embodiment 3
[0038] The composition of the steel plate is C: 0.08, Si: 0.15, Mn: 0.50, P: 0.08, S: 0.005, Als: 0.02, and the balance is Fe and unavoidable impurities.
[0039] Manufacturing method:
[0040] Desulfurization of molten iron is combined blowing in a converter, and an appropriate amount of medium-carbon ferromanganese, ferrosilicon and ferrophosphorus are added for alloying treatment. The weight percentage of Mn in the finished steel is controlled to be 0.50%, and the weight percentage of P is 0.08%. After argon continuous casting, the thickness of the continuous casting billet is 250mm, and then hot rolling is carried out. The final rolling temperature of the hot rolling process is controlled at 870-890°C. ℃, the steel plate thickness is controlled to be 2.8mm during hot continuous rolling. Rinse with clean water after pickling with 12% dilute hydrochloric acid. The total reduction rate is controlled at 70% during cold rolling, and the finished steel plate has a thickness of...
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