ホットプレス用めっき鋼板の製造方法

Title:

ホットプレス用めっき鋼板の製造方法

Document Type and Number:

Japanese Patent JP4500124

Kind Code:

B2

Abstract:

To provide a method for producing an aluminum plated steel sheet, a galvanized steel sheet or an aluminum-zinc plated steel sheet excellent in high temperature formability and hydrogen-brittleness resistance with which this steel sheet is used for a member, as a typical example, a structural member of car parts needed to the strength and produced with a high temperature press and after high temperature formation, the strength having ≥1200 MPa can be obtained.

The method for producing the steel sheet for hot press, is performed as the followings, by which in the case of annealing the steel sheet containing 0.1-0.5 mass% C, after annealing at 660°C-Ac3point under atmosphere having ≤15% hydrogen concentration and ≤0°C dew point, the plating mainly containing aluminum or zinc is applied and diffusible hydrogen in the steel is made to be ≤0.3 ppm.

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Inventors:

Masayuki Abe
Jun Maki
Masahiro Ogami
Kazuhisa Kusumi
Nobuhiro Fujita
Shinya Nakajima
Miyakoshi Jaku
Kunio Hayashi

Application Number:

JP2004215353A

Publication Date:

July 14, 2010

Filing Date:

July 23, 2004

Export Citation:

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Assignee:

Nippon Steel Corporation

International Classes:

C21D9/46; B21D22/20; C22C38/00; C22C38/04; C22C38/60; C23C2/06; C23C2/12; C23C2/40; C22C21/02

Domestic Patent References:

JP2003193190A
JP6025817A
JP9041110A
JP2000204462A
JP6145893A
JP2003126920A
JP2002146475A

Attorney, Agent or Firm:

Etsuichi Matsumoto
Shiina Akira

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