Austenitic stainless steel, and method for removing hydrogen...

Details Austenitic stainless steel, and method for removing hydrogen... Austenitic stainless steel, and method for removing hydrogen...

C - Chemistry, Metallurgy

21

D

C21D 6/00 (2006.01) C21D 3/06 (2006.01) C22C 38/00 (2006.01) C22C 38/58 (2006.01)

Patent

CA 2715814

The present invention focuses on diffusible hydrogen and non-diffusible hydrogen that cause hydrogen embrittlement in an austenitic stainless steel, and provides the austenitic stainless steel having diffusible hydrogen and non-diffusible hydrogen removed therefrom, and a method for removing hydrogen therefrom. In order to remove diffusible hydrogen and non--diffusible hydrogen, which cause hydrogen embrittlement in the austenitic stainless steel, an aging treatment is performed to the austenitic stainless steel at a temperature ranging from 200 to 1100°C while being kept in an air atmosphere. As a result, the hydrogen (H) content in the austenitic steel is removed to 0.001 wt% (1 wt ppm) or less.

L'invention porte sur un acier inoxydable austénitique exempt d'hydrogène pouvant diffuser et d'hydrogène ne pouvant pas diffuser, et sur un procédé pour le retrait d'hydrogène d'un acier inoxydable austénitique, tout en faisant attention à de l'hydrogène pouvant diffuser et à de l'hydrogène ne pouvant pas diffuser qui sont la cause d'une fragilité, due à l'hydrogène, de l'acier inoxydable austénitique. Pour retirer de l'hydrogène pouvant diffuser et de l'hydrogène ne pouvant pas diffuser, qui sont la cause d'une fragilité, due à l'hydrogène, de l'acier inoxydable austénitique, un acier inoxydable austénitique est vieilli à une température de 200 à 1100°C tout en étant maintenu dans un environnement atmosphérique, grâce à quoi la teneur en hydrogène (H) de l'acier est abaissée à 0,001 % en masse (1 ppm en masse) ou moins.

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