Title:
STEEL SHEET FOR HEAT TREATMENT EXCELLENT IN ADHESION OF OXIDE SCALE
Document Type and Number:
Japanese Patent JP3874124
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a steel sheet for heat treatment, free from the occurrence, in the course of a heat treatment stage such as quench-and-temper stage, of peeling of the oxide scale formed by heating in the air at the time of heat treatment.
SOLUTION: This steel sheet for heat treatment has a composition containing 0.3-1.2% C, 0.1-1.8% Si, and 0.3-2.0% Mn and further containing, if necessary, 0.1-2wt.% Cr and 0.1-2wt.% Ni independently or in combination. Further, the depth of a perfectly decarburized layer in the surface layer part of the steel sheet is 5-20μm. It is preferable to regulate the ratio or the depth of the perfectly decarburized layer to the thickness of the oxide scale formed by heating at the time of heat treatment to ≥1. By this method, a heat treated product excellent in surface quality can be obtained, and reduction of manufacturing costs and maintenance of work environment can be attained.
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Inventors:
Koji Osamu
Akifumi Hiramatsu
Makoto Akizuki
Toshiro Yamada
Akifumi Hiramatsu
Makoto Akizuki
Toshiro Yamada
Application Number:
JP9056396A
Publication Date:
January 31, 2007
Filing Date:
March 19, 1996
Export Citation:
Assignee:
Nisshin Steel Co., Ltd.
International Classes:
C21D1/76; C22C38/00; C21D3/04; C21D9/52; C22C38/58; (IPC1-7): C22C38/00; C21D1/76; C21D3/04; C21D9/52; C22C38/58
Domestic Patent References:
| JP83692A | ||||
| JP7268456A | ||||
| JP6262219A |
Attorney, Agent or Firm:
Wataru Ogura