Title:
ROLL
Document Type and Number:
Japanese Patent JP2003001307
Kind Code:
A
Abstract:
To provide a roll at a low cost which is tough in the inner portion and hard in the surface portion required as a roll having a good wear resistance and dent resistance.
A roll is made from an alloy containing C 0.8-1.2 mass%, Si 0.3-0.5 mass%, Mn 0.4-0.6 mass%, Cr 2.5-4.0 mass%, Mo 0.3-0.5 mass%, V 0.3 mass% max., balance FE plus inevitable impurities. The Vickers hardness of the surface portion of 4 to 8-mm depth from the surface to the center portion is 900 Hv min. and that of the deeper portion than this surface portion is less than 900 Hv.
Inventors:
YANO MASAHIKO
Application Number:
JP2001185146A
Publication Date:
January 07, 2003
Filing Date:
June 19, 2001
Export Citation:
Assignee:
NIPPON KOSHUHA STEEL CO LTD
International Classes:
B21B27/00; C22C38/00; C22C38/24; (IPC1-7): B21B27/00; C22C38/00; C22C38/24
Attorney, Agent or Firm:
Masanori Fujimaki