High strength, high toughness steel alloy

C - Chemistry – Metallurgy – 22 – C

Patent

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Details

C22C 38/42 (2006.01) C22C 38/02 (2006.01) C22C 38/04 (2006.01) C22C 38/44 (2006.01) C22C 38/46 (2006.01) C22C 38/48 (2006.01)

Patent

CA 2731754

A high strength, high toughness steel alloy is disclosed. The alloy has the following broad weight percent composition. Included in the balance are the usual impurities found in commercial grades of steel alloys produced for similar use and properties. Also disclosed is a hardened and tempered article that has very high strength and fracture toughness. The article is formed from the alloy having the broad weight percent composition set forth above. The alloy article according to this aspect of the invention is further characterized by being tempered at a temperature of about 500°F to 600°F.

L'invention porte sur un alliage d'acier à haute résistance et haute ténacité. L'alliage a la composition large en pourcentage en poids suivante. Sont inclus dans l'équilibre les impuretés usuelles trouvées dans les qualités d'alliages d'acier disponibles dans le commerce, produits pour une utilisation et des propriétés similaires. L'invention porte également sur un article durci et revenu qui a une très haute résistance et une haute ténacité à la fracture. L'article est formé à partir de l'alliage ayant la composition large en pourcentage en poids exposée ci-dessus. L'article d'alliage selon cet aspect de l'invention est en outre caractérisé en ce qu'il est revenu à une température d'environ 500°F à 600°F.

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