Plugs for use in piercing and elongating mills

Details Plugs for use in piercing and elongating mills Plugs for use in piercing and elongating mills

1980-12-12

1983-07-19

Combs, Ervin M.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72209, B21B 1904

Patent

active

043936776

ABSTRACT:
A plug for use in a piercing and elongating mill characterizing in that an adherent durable surface layer consisting essentially of iron oxides, i.e. FeO, Fe.sub.3 O.sub.4, Fe.sub.2 O.sub.3 or mixtures thereof is formed on the surface of the plug by spraying said molten iron oxide powder onto the plug surface to form said layer. The powder may also contain oxides of chromium, nickel, cobalt, copper, manganese and alloys thereof. The plug is preferably coated with a layer of nickel aluminum before the iron oxide powder is sprayed thereon.

REFERENCES:
patent: 2197098 (1940-04-01), Davis et al.
patent: 3237441 (1966-03-01), Eberle
patent: 3295346 (1967-01-01), Bomberger
patent: 3962897 (1976-06-01), Way et al.

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