Copper coated, iron-carbon eutectic alloy powders

Details Copper coated, iron-carbon eutectic alloy powders Copper coated, iron-carbon eutectic alloy powders

C - Chemistry, Metallurgy

22

C

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C22C 1/04 (2006.01) B22F 1/02 (2006.01) C22C 33/02 (2006.01)

Patent

CA 1071905

COPPER COATED, IRON-CARBON EUTECTIC ALLOY POWDERS ABSTRACT OF THE DISCLOSURE A mechanical mixture of selected powders is subjected to compressive forces to define a pre-compact, the pre-compact then being subjected to liquid phase sinter- ing for producing a raw alloy steel product which is more economical and has enhanced physical properties, particularly tensile strength as compared to sintered compacts produced by the prior art to date. The improvement in physical properties and processing technique results principally from the use of a mechanical mixture consisting of a base iron powder and a coated alloyed additive powder having selected alloying ingredients (such as manganese, nickel, molybdenum, in an iron-carbon system); the particles of the alloyed powder have a thin flash coating of a low melting metal, such as copper, to control carbon diffusion into the base iron powder during liquid phase sintering.

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