Anisotropic permanent magnet alloy and a process for the product

Details Anisotropic permanent magnet alloy and a process for the product Anisotropic permanent magnet alloy and a process for the product

1976-11-01

1978-06-06

Satterfield, Walter R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

75126H, 148 3157, 148121, C21D 104

Patent

active

040934772

ABSTRACT:
The thermo-magnetic-treated anisotropic permanent magnet alloy of the present invention consists essentially of, by weight, 17 to 45% chromium, 3 to 14.5% cobalt, 0.2 to 5% silicon and balance substantially iron, preferably 23 to 35% chromium, 7 to 14.5% of cobalt, 0.3 to 3% silicon and balance substantially iron and has a residual magnetic flux density of 7000 Gauss or more and a coersive force of 300 Oersted or more. In order to obtain the alloy, an alloy having the above identified composition is initially aged at a temperature of 570.degree. C to 670.degree. C for a period of 10 minutes to 5 hours in a magnetic field and secondarily aged at a temperature within 200.degree. C below the thermo-magnetic treatment temperature for a period of 30 minutes to 50 hours.

REFERENCES:
patent: 2002689 (1935-05-01), Bozorth et al.
patent: 3806336 (1974-04-01), Kaneko et al.
patent: 3982972 (1976-09-01), Iwata et al.

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