Method of sintering machinable ferrous-based materials

Details Method of sintering machinable ferrous-based materials Method of sintering machinable ferrous-based materials

1994-09-30

1996-07-09

Jordan, Charles T.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Sintering which includes a chemical reaction

419 10, 419 32, 419 38, 75228, 75230, 75231, 75245, 75246, B22F 312

Patent

active

055342205

ABSTRACT:
A method is described for the manufacture of a sintered ferrous-based material having improved machinability, the method comprises the steps of making a mixture of a ferrous-based powder, the mixture including a compound containing at least one metal from the group comprising manganese and the alkaline-earth series of metals; at least one sulphur donating material; pressing the powder mixture and sintering the pressed mixture so as to cause the formation by reaction during sintering of at least one stable metal sulphide within the sintered material. Materials and articles made by the method are also described.

REFERENCES:
patent: 3861906 (1975-01-01), Tipnis et al.
patent: 4035159 (1977-07-01), Hashimoto et al.
patent: 5259860 (1993-11-01), Ikenoue et al.
Patent Abstracts of Japan, vol. 6, No. 15, C-89, Abstract of 56-136953 (Kobe Seikosho K.K.) Oct. 26, 1981.
"Powder Metallurgy" 1983, vol. 26, No. 3 (Machinability of sintered steels pp. 137-144 by U. Engstrom).

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