HIGH STRENGTH FERRITIC STAINLESS STEEL AND PRODUCTION METHOD THEREFOR

Title:

HIGH STRENGTH FERRITIC STAINLESS STEEL AND PRODUCTION METHOD THEREFOR

Document Type and Number:

Japanese Patent JP2002285289

Kind Code:

A

Abstract:

To provide ferritic stainless steel which has increased strength, and simultaneously has improved toughness and workability by making powder with a hyperfine grain structure obtained by MA(metallic alloying), MM(metallic milling) or the like into the bulk one while maintaining the structure.

The ferritic stainless steel has a composition containing, by weight, 69.5 to 88.5% Fe and 11 to 30% Cr, and has a structure in which at least one kind selected from the oxides of Cr, Ti and Zr is dipsersed in a grain size of ≤0.02 μm, and which mainly consists of a ferritic structure, and an oxide phase, and a carbon phase formed from inevitably mixed C, and has a crystal grain size of ≤1 μm.

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Inventors:

TAGUCHI MASAMITSU
ISHIBASHI MAKOTO
AONO YASUHISA
SUMITOMO HIDEHIKO
MASUMOTO KOKI
FUJIKURA MASAKUNI

Application Number:

JP2001088082A

Publication Date:

October 03, 2002

Filing Date:

March 26, 2001

Export Citation:

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Assignee:

HITACHI LTD
CHOKOON ZAIRYO KENKYUSHO KK

International Classes:

B22F1/00; B22F3/02; B22F3/14; C22C38/00; C22C38/28; (IPC1-7): C22C38/00; B22F1/00; B22F3/02; B22F3/14

Attorney, Agent or Firm:

Katsuo Ogawa (1 person outside)

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