Title:
STEEL SHEET FOR VITREOUS ENAMELING EXCELLENT IN PRESS WRINKLE RESISTANCE
Document Type and Number:
Japanese Patent JP2500215
Kind Code:
B2
Abstract:
PURPOSE: To obtain a steel sheet for vitreous enameling excellent in press wrinkle resistance by rolling it by forming projecting and recessed parts with a prescribed regularity on a rolling roll.
CONSTITUTION: The rolling roll has a surface form that mean surface roughness Ra is ≥2.0μm, surface roughness is constituted of microscopic form that is constituted of ring-like recesses 2, that the relationship Sm/D between the diameter D of the ring-like recess 2 and the center distance Sm between the adjacent ring-like recesses 2 satisfies ≤1.5, that a S-value of parameter shows the regularity of surface roughness of the steel sheet 1 that is expressed by a formula indicates ≤0.25 in at least one direction. As the result of executing skin pass rolling under the draft of 1.5% to a cold rolled steel sheet of 1.8mm thick using a rolling roll with surface roughness under such conditions, the generation of press wrinkle isn't seen when this steel sheet is pressing formed.
Inventors:
OOSAWA KAZUNORI
IMANAKA MAKOTO
KATO TOSHUKI
IMANAKA MAKOTO
KATO TOSHUKI
Application Number:
JP146792A
Publication Date:
May 29, 1996
Filing Date:
January 08, 1992
Export Citation:
Assignee:
KAWASAKI STEEL CO
International Classes:
B21B1/22; C23D3/00; (IPC1-7): B21B1/22; C23D3/00
Domestic Patent References:
| JP63171201A | ||||
| JP63143272A | ||||
| JP4200902A |
Attorney, Agent or Firm:
Eiichi Kobayashi