Quenching apparatus, continuous annealing facility, quenching method, method for manufacturing steel sheet, and method for manufacturing coated steel sheet
AssigneeJfe Steel Corporation
InventorsSoshi YOSHIMOTO, Hirokazu KOBAYASHI
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Abstract
A quenching apparatus that is configured to cool a metal sheet, the quenching apparatus including: a cooling device that includes a plurality of jet nozzles that is configured to spray a cooling fluid onto a front surface and a back surface of the metal sheet; and a flow rate adjustment processor that that is configured to set a flow rate of the cooling fluid that is sprayed from the plurality of jet nozzles onto the front surface and the back surface of the metal sheet based on a shape of the metal sheet before quenching.
Claims12
A quenching apparatus that is configured to cool a metal sheet, the quenching apparatus comprising:
- a cooling device that includes a plurality of jet nozzles that is configured to spray a cooling fluid onto a front surface and a back surface of the metal sheet;
- and
- a flow rate adjustment processor that that is configured to set a flow rate of the cooling fluid that is sprayed from the plurality of jet nozzles onto the front surface and the back surface of the metal sheet based on a shape of the metal sheet before quenching, wherein
- the flow rate adjustment processor is configured to set the flow rate relative to a back surface side of the metal sheet to be larger than the flow rate relative to a front surface side of the metal sheet when the metal sheet before quenching has a warp curving to the front surface side, and is configured to set the flow rate relative to the front surface side of the metal sheet to be larger than the flow rate relative to the back surface side of the metal sheet when the metal sheet before quenching has a warp curving to the back surface side.
A quenching method for cooling a metal sheet by spraying a cooling fluid onto a front surface and a back surface of the metal sheet from a plurality of jet nozzles, the quenching method comprising,
- setting a flow rate of the cooling fluid that is sprayed from the plurality of jet nozzles onto the front surface and the back surface of the metal sheet based on a shape of the metal sheet before quenching, wherein the flow rate relative to a back surface side of the metal sheet is set to be larger than the flow rate relative to a front surface side of the metal sheet in a case where the metal sheet has a warp curving to the front surface side, and the flow rate relative to the front surface side of the metal sheet is set to be larger than the flow rate relative to the back surface side of the metal sheet in a case where the metal sheet has a warp curving to the back surface side.
Dependencies are inferred from the claim text.