Title:
CONTINUOUS ANNEALING APPARATUS, CONTINUOUS HOT DIP GALVANIZATION APPARATUS, AND METHOD FOR PRODUCING STEEL SHEET
Document Type and Number:
WIPO Patent Application WO/2023/181820
Kind Code:
A1
Abstract:
The present invention provides a continuous annealing apparatus which is capable of producing a steel sheet that has excellent hydrogen embrittlement resistance characteristics. A continuous annealing apparatus (100) according to the present invention comprises: a pay-off reel (10) for feeding a cold-rolled steel sheet (S) from a cold-rolled coil (C); an annealing furnace (20) through which the cold-rolled steel sheet (S) is passed to anneal the cold-rolled steel sheet (S) continuously, and in which a heating zone (22), a soaking zone (24) and a cooling zone (26) are positioned in this order from the upstream side as observed in a plate-passing direction so that the cold-rolled steel sheet (S) is annealed in a hydrogen-containing reducing atmosphere in the heating zone (22) and the soaking zone (24) and the cold-rolled steel sheet (S) is cooled in the cooling zone (26); a downstream facility (30) which is configured such that the cold-rolled steel sheet (S) discharged from the annealing furnace (20) is passed through the downstream facility (30) ongoingly; a tension reel (50) for winding up the cold-rolled steel sheet (S) that is passing through the downstream facility (30); and a magnetic field application device (60) for applying a stationary magnetic field to the cold-rolled steel sheet (S), which is passing from the cooling zone (26) to the tension reel (50), in the sheet width direction of the cold-rolled steel sheet (S).
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Inventors:
ENDOH KAZUKI (JP)
MORIMOTO RYOHEI (JP)
TOJI YUKI (JP)
MORIMOTO RYOHEI (JP)
TOJI YUKI (JP)
Application Number:
PCT/JP2023/007690
Publication Date:
September 28, 2023
Filing Date:
March 01, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D9/56; C21D3/06; C22C38/00; C22C38/06; C22C38/58; C22C38/60; C23C2/02; C23C2/28; C23C2/40
Domestic Patent References:
| WO2023286440A1 | 2023-01-19 |
Foreign References:
| JPH10130739A | 1998-05-19 | |||
| JPS56169719A | 1981-12-26 | |||
| JPS6312555A | 1988-01-19 |
Attorney, Agent or Firm:
SUGIMURA Kenji (JP)
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