Method for producing an austenitic steel Fe-Cr-Ni strengthened by an oxide dispersion

Cryogenic grinding and co-grinding with oxide powders followed by sieving and consolidation address the sticking issue in austenitic ODS steel production, enhancing yield and maintaining material quality with nanoprecipitation and improved mechanical properties.

US20260166622A1Pending Publication Date: 2026-06-18COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Filing Date
2025-12-10
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

The production of austenitic ODS steels through powder metallurgy is hindered by powder sticking during mechanosynthesis, leading to low yield and poor chemical homogeneity, with existing solutions causing contamination, mechanical property degradation, or producing porous materials with coarse oxides.

⚗Method used

A method involving cryogenic grinding of austenitic Fe-Cr-Ni powder followed by co-grinding with oxide powder, sieving, and consolidation via hot isostatic compaction or flash sintering to produce an austenitic steel Fe-Cr-Ni strengthened by an oxide dispersion.

🎯Benefits of technology

Enhances yield and maintains material quality by preventing powder sticking, achieving nanoprecipitation of oxides and improving mechanical properties without contamination or porosity.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to a method for producing an austenitic steel Fe—Cr—Ni strengthened by an oxide dispersion, said method comprising the following steps:a) providing (100) an austenitic steel Fe—Cr—Ni powder;b) carrying out (200) a grinding operation, known as cryogenic grinding, on the austenitic steel Fe—Cr—Ni powder at a temperature of between −50° C. and −196° C. ;c) providing (300) a powder of oxides ;d) carrying out (400) a co-grinding of the austenitic steel Fe—Cr—Ni powder with the oxide powder thus supplied to obtain an austenitic steel Fe—Cr—Ni powder strengthened by an oxide dispersion; ande) producing (500) the austenitic steel Fe—Cr—Ni strengthened by an oxide dispersion from the powder thus produced.
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