Cold Rolled Steel Sheet for High Productivity Hot Stamp
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End of Conventional Single Process Working End of Conventional Single Process Working Cold Rolled Steel Sheet for High Productivity Hot Stamp Effect Points Steel Sheet for High Productivity Hot Stamp, which Enables Continuous Multi-Process Press ‒Press Speed × 5-10 (compared with conventional steel) Developed Steel with Improved Hardenability compared with Conventional Hot Stamp Steel Concept Concept Hardness Distribution Hardness Distribution Hat Channel Formation Test Hat Channel Formation Test Hardness in the Part Has Less Variance Hardness in the Part Has Less Variance Conveyed to the Press Conveyed to the Press ② Our Proposal ② Our Proposal ・Manufacturing with multiple processes using existing press machines (②) is enabled. ・Manufacturing with multiple processes using existing press machines (②) is enabled. ③ ③ Lower Dead Point Retained for a Short Time ③ Lower Dead Point Retained for a Short Time New Steel Sheet New Steel Sheet ・Stable strength is obtained even with shorter lower dead point retention time (③). ・Stable strength is obtained even with shorter lower dead point retention time (③). ① Conventional ① Conventional (Lower Dead Point Retention=10 sec) (Lower Dead Point Retention=10 sec) ① Conventional Steel Sheet ① Conventional Steel Sheet Start of Forming Start of Forming End of Forming End of Forming Natural Air Cooling Natural Air Cooling Time from Start of Forming Die R Area Die R Area Conventional Steel Sheet Conventional Steel Sheet (Lower Dead Point Not Retained) (Lower Dead Point Not Retained) Die R Area Die R Area Example of Cross Section Hardness Distribution Example of Cross Section Hardness Distribution Distance from the End (mm) Distance from the End (mm) 1 s t Process 2 nd Process 3 rd Process Vicke r s Hardness
Transcript of Cold Rolled Steel Sheet for High Productivity Hot Stamp
End of ConventionalSingle Process WorkingEnd of Conventional
Single Process Working
Cold Rolled Steel Sheet forHigh Productivity Hot Stamp
Effect
Points
Steel Sheet for High Productivity Hot Stamp, which Enables Continuous Multi-Process Press ‒Press Speed × 5-10 (compared with conventional steel)
Developed Steel with Improved
Hardenability compared with
Conventional Hot Stamp Steel
ConceptConcept
Hardness DistributionHardness Distribution
Hat Channel Formation TestHat Channel Formation Test
Hardness in the Part Has Less VarianceHardness in the Part Has Less Variance
Conveyed to the PressConveyed to the Press
② Our Proposal② Our Proposal
・Manufacturing with multipleprocesses using existing pressmachines (②) is enabled.
・Manufacturing with multipleprocesses using existing pressmachines (②) is enabled.
③③
③Lower Dead Point Retainedfor a Short Time
③Lower Dead Point Retainedfor a Short Time
New Steel Sheet
New Steel Sheet
・Stable strength is obtainedeven with shorter lowerdead point retention time (③).
・Stable strength is obtainedeven with shorter lowerdead point retention time (③).
①Conventional①Conventional
(Lower Dead Point Retention=10 sec)(Lower Dead Point Retention=10 sec)
①ConventionalSteel Sheet
①ConventionalSteel Sheet
Start of FormingStart of Forming
End of FormingEnd of Forming
Natural AirCooling
Natural AirCooling
Time from Start of Forming
Die R AreaDie R Area
Conventional Steel Sheet
Conventional Steel Sheet
(Lower Dead Point Not Retained)(Lower Dead Point Not Retained)
Die R AreaDie R Area
Example of Cross SectionHardness Distribution
Example of Cross SectionHardness Distribution
Distance from the End (mm)Distance from the End (mm)
1st Process
2nd Process
3rd Process
Vickers
Hard
ness
