PRODUCTION OF AUSTENITIC STAINLESS STEEL SHEET EXCELLENT IN PITTING CORROSION RESISTANCE

Title:

PRODUCTION OF AUSTENITIC STAINLESS STEEL SHEET EXCELLENT IN PITTING CORROSION RESISTANCE

Document Type and Number:

Japanese Patent JP3297704

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a method for producing an austenitic stainless steel sheet exhibiting excellent pitting corrosion resistance even if an oxidized film is flawed at a low cost.
SOLUTION: An austenitic stainless hot rolled steel sheet is subjected to cold rolling and is thereafter subjected to bright annealing treatment in the temp. range of 950 to 1150°C in an atmospheric gas contg., by volume, 20 to 60% gaseous N2 and 4O to 60% gaseous H2 and, if required, ≤2% gaseous NH3 to control the concn. of nitrogen in the surface layer to a depth of 10 μm from the surface of the steel sheet to ≥0.15 mass %.

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Inventors:

Masaharu Hadano
Shinji Tsuge

Application Number:

JP34505898A

Publication Date:

July 02, 2002

Filing Date:

December 04, 1998

Export Citation:

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Assignee:

SUMITOMO METAL INDUSTRIES,LTD.

International Classes:

C23C8/26; C21D1/06; C21D6/00; (IPC1-7): C23C8/26; C21D1/06; C21D6/00

Attorney, Agent or Firm:

Morio Mori (1 outside)

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