Method for producing a machinable, high strength hot formed powd

Details Method for producing a machinable, high strength hot formed powd Method for producing a machinable, high strength hot formed powd

1982-06-21

1984-06-05

Padgett, Benjamin R.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Post sintering operation

419 14, 419 38, 419 48, 419 53, 419 55, 75236, 75246, B22F 326, B22F 314

Patent

active

044527560

ABSTRACT:
A method for producing a machinable, high strength hot formed powdered ferrous base metal alloy is provided which comprises providing a particulate mixture consisting of, in weight percent, from about 1.0 to about 3.0 percent copper, from about 0.16 to about 0.35 percent sulfur, from about 0.4 to about 0.8 percent carbon, with the balance being iron plus from 0 to about 2 percent incidental impurities; forming this particulate mixture into a preformed article having a predetermined configuration; sintering the so-formed article at a temperature sufficient to produce the desired alloy; and subjecting the sintered article to a hot forming treatment to produce a hot formed, machinable, high strength ferrous base powdered metal alloy article having a density near theoretical.

REFERENCES:
patent: 4086390 (1978-04-01), Mitani et al.
Goetzel, C. G.; Treatise on Powder Metallurgy; 1950, pp. 406-414.
Lyman, T. (ed.); Metals Handbook, 8th Edition; vol. 1, 1961, p. 106.

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