Steel having high mechanical properties and manufacturing process thereof
AssigneesNexter Munitions, Universite De Bourgogne
InventorsArnaud Bolsonella, Hervé Couque, Frédéric Bernard
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Abstract
A steel having high mechanical properties, characterized in that it has the following composition by weight: 12% to 25% Nickel; 7.4% to 20% Cobalt; 3% to 11% Molybdenum; 0.2% to 2.21% addition elements, the remainder being iron, the structure of the material including a combination of fine grains and ultrafine grains, the so-called fine grains having a grain size of between 1.2 micrometers and 3 micrometers and the so-called ultrafine grains having a grain size of between 0.2 and 1 micrometer, the proportion of ultrafine grains being between 55% and 65%, and a process for manufacturing the steel.
Claims11
A steel wherein it has the following composition by weight:
- 12% to 25% nickel;
- 7.4% to 20% cobalt;
- 3% to 11% molybdenum;
- 0.2% to 2.21% additional elements, the remainder being iron, the structure of the steel comprising a combination of fine grains and ultrafine grains, the fine grains having a grain size of between 1.2 micrometers and 3 micrometers, and the ultrafine grains having a grain size of between 0.2 micrometer and 1 micrometer, the proportion of ultrafine grains being between 55% and 65%.
Dependencies are inferred from the claim text.