Method of producing steel material
AssigneeJfe Steel Corporation
InventorsKohei Furumai, Norichika Aramaki, Yuji Miki, Takeshi Murai, Toru Inoue, Yukio Usui, Tomoharu Ishida
Life of this patent
Estimating the term…
Abstract
A method of producing a steel material includes a step of adding Ca to molten steel with an amount of Ca adjusted within a range satisfying the formula (1) below: 0.5 ≤ { Ca · y / 100 - ( [ S · W / 100 ) · 40.08 / 32.07 } 56.08 40.08 ( [ Al 2 O 3 ] · W / 100 ) ≤ 1.5 ( 1 ) where Ca is the amount [kg] of Ca added, y is an yield [%] of Ca, [S] is a concentration [% by mass] of S in the steel before addition of Ca, [Al2O3] is an amount [% by mass] of Al2O3 in the steel before addition of Ca, and W is a weight [kg] of the molten steel.
Claims4
A method of producing a steel material, the method comprising a step of adding Ca to molten steel with an amount of Ca adjusted within a range satisfying the formula (1) below:
- 0.5
- ≤
- {
- Ca
- ·
- y
-
- /
-
- 100
- -
- (
- [
- S
- ]
- ·
- W
-
- /
-
- 100
- )
- ·
- 40.08
-
- /
-
- 32.07
- }
-
- 56.08
- 40.08
- (
- [
- Al
- 2
-
- O
- 3
- ]
- ·
- W
-
- /
-
- 100
- )
- ≤
- 1.5
- (
- 1
- )
- where Ca is the amount [kg] of Ca added,
- y is an yield [%] of Ca,
- [S] is a concentration [% by mass] of S in the steel before addition of Ca,
- [Al2O3] is an amount [% by mass] of Al2O3 in the steel before addition of Ca, and
- W is a weight [kg] of the molten steel.
Dependencies are inferred from the claim text.