Ultra-high strength martensitic alloy

Details Ultra-high strength martensitic alloy Ultra-high strength martensitic alloy

C - Chemistry, Metallurgy

22

C

C22C 38/52 (2006.01) C22C 38/44 (2006.01)

Patent

CA 2629515

An age hardenable martensitic steel alloy is disclosed. The alloy has the following composition in weight percent. C 0.30-0.36; Mn 0.05 max.; Si 0.05 max.; P 0.01 max.; S 0.0010 max.; Cr 1.30-3.2; Ni 10.0-13.0; Mo 1.0-2.70; Co 13.8-17.4; Ti 0.02 max.; Al 0.005 max.; Ce 0.030 max.; La 0.010 max. The balance is iron and the usual impurities. The composition of this alloy is balanced to provide a unique combination of very high strength, together with good toughness, ductility, and resistance to fatigue.

L~invention concerne un alliage d~acier martensitique durcissable par vieillissement. L~alliage présente la composition suivante en pourcentages par poids. C 0,30-0,36 ; Mn 0,05 max. ; Si 0,05 max. ; P 0,01 max. ; S 0,0010 max. ; Cr 1,30-3,2 ; Ni 10,0-13,0 ; Mo 1,0-2,70 ; Co 13,8-17,4 ; Ti 0,02 max. ; Al 0,005 max. ; Ce 0,030 max. ; La 0,010 max. Le reste est composé de fer et des impuretés classiques. La composition de cet alliage est équilibrée afin d~offrir une combinaison unique d~une résistance ultra élevée et d~une bonne ténacité, d~une bonne ductilité et d~une bonne résistance à la fatigue.

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