Ferritic stainless steel and method for manufacturing same, ferritic stainless steel plate and method for manufacturing same, and fuel cell member

Abstract

This ferritic stainless steel is characterized by including, in terms of % by mass, 12.0-16.0% Cr, 0.020% or less of C, 2.50% or less of Si, 1.00% or less of Mn, 0.050% or less of P, 0.0030% or less of S, 2.50% or less of Al, 0.030% or less of N, and 0.001-1.00% Nb, and furthermore including one or more of 0.0200% or less of B, 0.20% or less of Sn, 0.0200% or less of Ga, 0.0200% or less of Mg, and0.0100% or less of Ca, formula (1) being satisfied, and the remainder comprising Fe and impurities. (1): 10(B + Ga) + Sn + Mg + Ca > 0.020

Description

technical field [0001] The present invention relates to a ferritic stainless steel, a method for producing the same, a ferritic stainless steel plate, a method for producing the same, and a member for a fuel cell. [0002] This application is based on Japanese Patent Application No. 2018-060883 filed in Japan on March 27, 2018, Japanese Patent Application No. 2018-060885 filed in Japan on March 27, 2018, and Japanese Patent Application No. 2018 filed in Japan on March 27, 2018. -060886, the contents of which are incorporated herein by reference. Background technique [0003] Recently, due to the depletion of fossil fuels represented by oil, CO 2 Due to the global warming phenomenon caused by emissions, the spread of new systems that replace conventional power generation systems is accelerating. As one of them, a "fuel cell" that has high practical value as a distributed power source or a power source for automobiles has attracted attention. There are several types of fuel...

AI Technical Summary

Problems solved by technology

[0008] Furthermore, in the fuel cell system, when stainless steel containing a relatively high amount of Cr is used, since the operating temperature is very high, there is also the problem of preventing poisoning of the electrodes caused by the evaporation of Cr.

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