Verfahren zur Herstellung von Ausscheidungshärtendem Austenitischem Legierungsstahlmaterial, Warmgeformtes Ausscheidungshärtendes Austenitisches Legierungsmaterial und Ausscheidungshärtendes Austenitisches Legierungsstahlmaterial

Details

Veröffentlichungs-Nr.

EP4756045

Anmeldetag

2. August 2024

Veröffentlichung

6. Februar 2025

Rechtsraum

EP

Abstract

The present invention provides a precipitation hardening austenitic alloy steel material which is capable of further improving mechanical characteristics without improving the composition of a steel material, and with which it is possible to expect a longer service life of a component in a high-temperature high-load environment or a high-pressure hydrogen environment. Provided is a method for producing a precipitation hardening austenitic alloy steel material, the method comprising: a hot working step in which hot working is performed on a material for hot working so as to obtain a hot-worked material that has crystal grains having a GOS value of 1.0° or more at an area ratio of 50% or more, the material having a composition of a precipitation hardening austenitic alloy; and a heat treatment step in which the hot-worked material is subjected to solution heat treatment and aging treatment so as to obtain a steel material. The solution heat treatment temperature in the heat treatment step is 850-1050°C, and the aging treatment temperature in the heat treatment step is 700-750°C. Also provided are: a hot-worked precipitation hardening austenitic alloy material; and a precipitation hardening austenitic alloy steel material.

Anmelder

Firma

Proterial, Ltd.

Land

🇯🇵 Japan