Shape-correcting and rolling method and shape-correcting device for high-strength steel
AssigneePosco
InventorsGil-Ho Song, Jae-Woong Byun, Nam-Il Jo, Sang-Kug Je, Jae-Wook Bae
Life of this patent
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Abstract
There are provided a shape-correcting and rolling method and a shape-correcting device for effectively correcting the shape of high-strength steel. The shape-correcting and rolling method includes: transferring a hot-rolled coil to a pay-off reel after cooling the hot-rolled coil or directly through a hot rolling to skin pass mill direct transfer process; unwinding the coil from the pay-off reel; correcting a shape of a strip unwound from the coil by using a heat pipe roller; and rewinding the strip as a coil.
Claims15
A shape-correcting and rolling method for high-strength steel, comprising:
- performing a hot rolling to skin pass mill direct transfer process by transferring a hot-rolled coil to a pay-off reel;
- unwinding a strip from the coil of the pay-off reel;
- correcting a shape of the strip by using at least a pair of heat pipe rollers;
- and
- rewinding the strip as a coil,
- wherein each of the heat pipe rollers comprises
- a plurality of first heat pipes extending in a length direction of the heat pipe roller from an end to a center region of the heat pipe roller and
- a plurality of second heat pipes extending from an opposite end to the center region,
- the plurality of first and the plurality of second heat pipes are alternately arranged in a circumferential direction of the heat pipe roller, and
- the plurality of first and the plurality of second heat pipes overlap each other only in the center region in the length direction of the heat pipe roller.
A shape-correcting and rolling method for high-strength steel, comprising:
- performing a first transfer process by transferring a hot-rolled coil to a temperature adjusting unit;
- cooling the coil while monitoring a temperature of the coil;
- performing a second transfer process by transferring the coil cooled to a temperature of 150° C. or higher to a pay-off reel;
- unwinding a strip from the coil of the pay-off reel;
- correcting a shape of the strip by using a pair of heat rollers;
- and
- rewinding the strip as a coil,
- wherein each of the heat pipe rollers comprises
- a plurality of first heat pipes extending in a length direction of the heat pipe roller from an end to a center region of the heat pipe roller and
- a plurality of second heat pipes extending from an opposite end to the center region,
- the plurality of first and the plurality of second heat pipes are alternately arranged in a circumferential direction of the heat pipe roller, and
- the plurality of first and the plurality of second heat pipes overlap each other only in the center region in the length direction of the heat pipe roller.
A shape-correcting device for high-strength steel, the shape-correcting device comprising:
- a pay-off reel from which a coil is unwound;
- a skin pass mill correcting a strip unwound from the coil of the pay-off reel;
- and
- a coiler rewinding the strip after the strip passes through the skin pass mill,
- wherein the skin pass mill comprises a work roll that is a heat pipe roller in which heat pipes are installed,
- wherein the heat pipes comprise
- a plurality of first heat pipes extending in a length direction of the work roll from an end to a center region of the work roll and
- a plurality of second heat pipes extending from an opposite end to the center region,
- the plurality of first and the plurality of second heat pipes are alternately arranged in a circumferential direction of the work roll, and
- one of the plurality of the first heat pipes and one of the plurality of the second heat pipes overlap each other only in the center region in the length direction of the work roll.
Dependencies are inferred from the claim text.