Method of manufacturing metal articles having magnetic and non-m

Details Method of manufacturing metal articles having magnetic and non-m Method of manufacturing metal articles having magnetic and non-m

1974-10-17

1976-04-27

Satterfield, Walter R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 39, 148120, 148145, 148148, H01F 100

Patent

active

039532526

ABSTRACT:
A method of manufacturing metal articles having magnetic and non-magnetic areas comprises the thermal treatment of an all-metal blank made of a metal capable of forming a non-magnetic structure as a result of ageing and of becoming magnetic after high-temperature hardening. The areas intended to form the non-magnetic structure are heated to a temperature ranging from 450.degree. to 1000.degree.C, soaked to form the non-magnetic structure and then cooled, while the areas intended to form the magnetic structure are heated to a temperature ranging from 1000.degree.C to the melting temperature of the metal to preserve the uniformity of the blank, and then cooled at a rate preventing the formation of the non-magnetic structure.

REFERENCES:
patent: 2002689 (1935-05-01), Bozorth et al.
patent: 2382651 (1945-08-01), Nesbitt
patent: 2765161 (1956-10-01), Mungall
patent: 3047382 (1962-07-01), Harpster
patent: 3707001 (1972-12-01), Notley
patent: 3736131 (1973-05-01), Espy
patent: R20421 (1937-06-01), Payson
Young, J.; Materials & Processes, New York, 1954, pp. 711-715.
Grossman, M.; Principles Of Heat-Treatment; ASM, Cleveland, 1935, pp. 101-103 & 195-196.
Bozorth, R.; Ferromagnetism, New York, 1951, pp. 6, 8-10, 15 & 16, & 713-719.

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