Copper coated, iron-carbon eutectic alloy powders

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

1975-06-06

1977-03-08

Schafer, Richard E.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

29182, 75200, 75213, B22F 316, C22C 104

Patent

active

040110770

ABSTRACT:
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 sintering 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.

REFERENCES:
patent: 2273589 (1942-02-01), Olt
patent: 3223523 (1965-12-01), Adler
patent: 3379521 (1968-04-01), Butcher
patent: 3778100 (1973-11-01), Kizer
patent: 3838982 (1974-10-01), Sanderow
Isaksson, S. E., Chem. Abs. No. 80: 40264x, 1973.
Ito, Teiji, et al., Chem. Abs. No. 79: 117566m, 1973.
Fischmeister, et al., "Fast Diffusion Alloying for Powder Forging Using a Liquid Phase, " In Powd. Met. 17(33): 227-240, 1974.
Lindskoy, P., et al., "Alloying Practice in the Production of Sintered Steels", The Institute of Metals, pp. 375-396, 1971.

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