FERRITIC STAINLESS STEEL AND PROCESS FOR PRODUCING SAME

Title:

FERRITIC STAINLESS STEEL AND PROCESS FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2016/103565

Kind Code:

A1

Abstract:

The present invention addresses the problem of providing a Cu-containing ferritic stainless steel which has satisfactory corrosion resistance and which, when brazed at a high temperature using an Ni-containing brazing material, has satisfactory brazability. The present invention is characterized in that the steel has a composition which contains, in terms of mass%, 0.003-0.025% C, 0.05-1.00% Si, 0.05-1.00% Mn, up to 0.04% P, up to 0.01% S, 16.0-23.0% Cr, 0.20-0.80% Cu, 0.05-0.60% Ni, 0.20-0.70% Nb, and 0.005-0.020% N, with the remainder comprising Fe and unavoidable impurities, and that a nitrogen-enriched layer has been formed so that the peak value for nitrogen concentration in the part ranging from the surface to a depth of 0.05 µm is 0.03-0.30 mass%.

Inventors:

FUKUDA KUNIO (JP)
ISHIKAWA SHIN (JP)
FUJISAWA MITSUYUKI (JP)
YAMAUCHI KATSUHISA (JP)
KAMI CHIKARA (JP)

Application Number:

PCT/JP2015/005728

Publication Date:

June 30, 2016

Filing Date:

November 17, 2015

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

C22C38/00; C21D1/06; C21D1/76; C21D9/46; C22C38/48; C22C38/54; C23C8/26

Foreign References:

JPH01168811A	1989-07-04
JP2009197293A	2009-09-03
JPH01176094A	1989-07-12

Other References: