Hot rolled steel having improved formability

Details Hot rolled steel having improved formability Hot rolled steel having improved formability

2006-02-28

2006-02-28

Wyszomierski, George (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

With casting or solidifying from melt

C148S508000, C148S330000, C148S648000, C148S546000

Reexamination Certificate

active

07005016

ABSTRACT:
A method of producing hot rolled steel having improved formability and minimal silver formation comprises the addition of Titanium and Boron to the molten steel to combine with and remove the free nitrogen prior to rolling. Titanium is added so that the amount of nitrogen remaining after Ti addition is about 0.0005 wt % to about 0.0025 wt % and Boron is added to remove the balance of the nitrogen by forming BN.

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Yamamoto, Koichi et al., “Formation Mechanism and Prevention Method of Facial Cracks of Continuously Cast Steel Slabs Containing Boron”.
N. Takahashi et al., “Baron-Bearing Steels for Continuous Annealing to Produce Deep Drawing and High Strength Steel Sheets”. p. 133-153.

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