Piercing and rolling plug, method of regenerating such...

Details Piercing and rolling plug, method of regenerating such... Piercing and rolling plug, method of regenerating such...

2009-06-24

2011-12-27

Tolan, Edward (Department: 3725)

Metal deforming

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

During rotation of work

C072S047000, C072S209000

Reexamination Certificate

active

08082768

ABSTRACT:
A piercing and rolling plug has a film composed of oxides such as Fe3O4and FeO and Fe (metal) as being formed on the surface of the base metal by electric arc spraying using an iron wire whose main component is Fe and, owing to this film, a plug excellent in heat-shielding and seizure-preventing effects can be realized and the lifetime of the plug can be prolonged. Further, in regenerating this plug, a film can be re-formed via the steps of shot blasting of the as-used plug in piercing and rolling and electric arc spraying in that order; thus, it is possible to regenerate the plug at low cost and in a short period of time.

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