Title:
MANUFACTURE OF MARAGING STEEL
Document Type and Number:
Japanese Patent JP3266823
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for manufacturing a maraging steel excellent in strength, toughness and ductility by producing a steel ingot by a mass- production process of an electric furnace melting - ladle refining - RH degassing - ingot-making instead of a VAR method.
SOLUTION: The steel consisting by wt. ≤0.03% C, ≤0.10% Mn, ≤0.01% P, ≤0.01% S, 10.0-20.0% Ni, 3.0-7.0% Mo, 5.0-15.0% Co, 0.05-0.15% Al, 0.2-0.9% Ti and the balance Fe with inevitable impurities is melted and refined by the processes of electric furnace melting - ladle refining - RH degassing, and the ingot-making is executed for the steel ingot having 490,000mm2 the max cross sectional area, 2.0-4.0 ratio (ratio of height and width) of the height and the average width or the average diameter of the steel ingot and ≤6t wt. Since micro-segregation is little, the maraging steel excellent in strength, toughness and ductility, is manufactured.
Inventors:
Nobuhiro Hori
Hideki Nakamura
Tsuji Nobuhiro I
Naoki Katayama
Hideki Nakamura
Tsuji Nobuhiro I
Naoki Katayama
Application Number:
JP1444597A
Publication Date:
March 18, 2002
Filing Date:
January 10, 1997
Export Citation:
Assignee:
Sanyo Special Steel Co., Ltd.
International Classes:
B22D7/00; C21C7/10; C22C38/00; C22C38/12; (IPC1-7): B22D7/00; C21C7/10; C22C38/00; C22C38/12
Domestic Patent References:
| JP63145746A |
Attorney, Agent or Firm:
Kenji Yokoi
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