Title:
熱的に処理された鋼板を製造するための方法
Document Type and Number:
Japanese Patent JP7390350
Kind Code:
B2
Abstract:
A method for manufacturing a thermally treated steel sheet is described. The method includes:A. preparation step containing:1) a selection substep, wherein:a. mtarget and a chemical composition are compared to a list of predefined products, whose microstructure contains predefined phases and predefined proportion of phases, and a product having a microstructure mstandard closest to mtarget and TPstandard is selected, including at least a heating, a soaking and a cooling steps, to obtain mstandard,b. a heating path, a soaking path including a soaking temperature Tsoaking, a power cooling of the cooling system and a cooling temperature Tcooling are selected based on TPstandard and2) a calculation substep, wherein through variation of the cooling power, new cooling paths CPx are calculated based on the product selected in step A.1)a and TPstandard, the initial microstructure mi of the steel sheet to reach mtarget, the heating path, the soaking path comprising Tsoaking and Tcooling, the cooling step of TPstandard is recalculated using said CPx in order to obtain new thermal paths TPx, each TPx corresponding to a microstructure mx,3) a selection substep wherein one TPtarget to reach mtarget is selected, TPtarget being chosen among the calculated thermal paths TPx and being selected such that mx is the closest to mtarget, andB. a thermal treatment step wherein TPtarget is performed on the steel sheet.
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Inventors:
Frederick Bonnet
Yannick Do
Yannick Do
Application Number:
JP2021209039A
Publication Date:
December 01, 2023
Filing Date:
December 23, 2021
Export Citation:
Assignee:
ArcelorMittal
International Classes:
C21D9/46; C21D9/56; C22C38/00
Domestic Patent References:
| JP10158747A | ||||
| JP10036923A |
Foreign References:
| WO2010049600A1 | ||||
| CN102851474A |
Attorney, Agent or Firm:
Kawaguchi International Patent Office