High-strength thin-gauge checkered steel plate/strip and manufacturing method therefor
AssigneeBaoshan Iron & Steel Co., Ltd.
InventorsJianchun Wu, Yuan Fang
Life of this patent
Estimating the term…
Abstract
Provided are a high-strength thin-gauge checkered steel plate/strip comprising the following chemical elements in weight percentages: C: ≤0.06%, Si: ≤0.5%, Mn: 0.4-1.7%, P≤0.04%, S≤0.007%, N: 0.004-0.010%, Als: <0.001%, B: 0.001-0.006%, Mn/S≥250, total oxygen [O]T: 0.007-0.020%; Cu: 0.1-0.6% and/or Sn: 0.005-0.04%; and a balance of Fe and other unavoidable impurities, and a manufacturing method thereof. The resultant steel roll can be used directly as hot-rolled checkered plate/strip, or as a finished checkered plate/strip after being cut and finished, and is widely applicable to the fields of architecture, mechanical production, automobile, bridges, transportation, ship building, etc.
Claims16
A checkered steel plate/strip, consisting of the following chemical elements in weight percentages:
- C:
- ≤0.06%, Si:
- ≤0.5%, Mn:
- 0.4-1.7%, P≤0.04%, S≤0.007%, N:
- 0.004-0.010%, Als:
- <0.001%, B:
- 0.001-0.006%, Mn/S≥250, total oxygen [O]T:
- 0.007-0.020%;
- Cu:
- 0.1-0.6% and/or Sn:
- 0.005-0.04%;
- and a balance of Fe and other unavoidable impurities,
- wherein the checkered steel plate/strip has a yield strength of ≥345 MPa, a tensile strength of ≥470 MPa, and an elongation of ≥22%,
- wherein the checkered steel plate/strip has a thickness of 0.8-2.5 mm, and
- wherein the checkered steel plate/strip has a microstructure that is a mixed microstructure consisting of acicular ferrite and pearlite.
Dependencies are inferred from the claim text.