Antiferromagnetic chromium base invar-type alloys and a method o

Details Antiferromagnetic chromium base invar-type alloys and a method o Antiferromagnetic chromium base invar-type alloys and a method o

1977-03-30

1978-05-16

Stallard, W.

Metal treatment

Compositions

Heat treating

75176, 148 32, C22C 2800, C22D 111

Patent

active

040897117

ABSTRACT:
Antiferromagnetic chromium base invar-type alloys and a method of producing the same are disclosed. These alloys are produced by adding 0.05-10 wt% of at least one rare earth element to antiferromagnetic chromium base invar-type alloy consisting of 0.5-6 wt% of iron and/or silicon, 1.5-6 wt% of cobalt and/or manganese and remainder of chromium, and then subjecting the resulting alloy ingot to a primary hot working by heating at a temperature of 800.degree.-1200.degree. C, and have a reduction ratio of not less than 60% and a thermal expansion coefficient of not more than 4.times.10.sup.-6 /.degree. C.

REFERENCES:
patent: 3008854 (1961-11-01), Grant et al.
patent: 3015559 (1962-01-01), McGurty et al.
patent: 3547713 (1970-12-01), Steinemann et al.

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