Crs Holdings, Inc.

Alberto O Polar-Rosas

Stephane A Forsik

Gregory J Del Corso

Samuel J Kernion

Olivier Schiess

Pierre Marechal

Mario Epler

Tao Wang

Ning Zhou

Wesley T Roth

Andrea Ricci

A precipitation hardenable, cobalt-nickel base superalloy is disclosed. The is characterized by the following weight percent composition. The balance of the alloy is cobalt and usual impurities. The alloy provides a novel combination of strength and ductility after long-term exposure to elevated operating temperatures as found in gas turbines and jet engines. A fine-grain steel article made from the alloy is also disclosed. The steel article is also characterized by a continuous surface layer of AlOand CrOthat protects the alloy from oxidation at the elevated operating temperatures.

Precipitation hardenable cobalt-nickel base superalloy and article made therefrom

A precipitation hardenable, martensitic stainless steel is disclosed. The alloy has the following broad composition in weight percent. The balance of the alloy is iron and the usual impurities found in commercial grades of precipitation hardenable martensitic stainless steels as known to those skilled in the state of the art in melting practice for such steels. A method of making parts from the alloy and an article of manufacture made from the alloy are also described.

High fracture toughness, high strength, precipitation hardenable stainless steel

A method of making a small diameter elongated steel article such as wire or strip is disclosed. The method includes the step of melting a steel alloy having the following weight percent composition and the balance is iron and usual impurities. The method includes melting the alloy, atomizing the molten alloy to make a pre-alloyed metal powder, consolidating the metal powder to substantially full density, and then hot working the consolidated metal powder to form an intermediate elongated article. The method further includes a multi-step heat treating process. A small diameter, elongated steel article having enhanced machinability is also disclosed.

Free-machining powder metallurgy steel articles and method of making same

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Alberto O Polar-Rosas