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Primary Examiner: Larson, Lowell A.
Assistant Examiner: Combs, E. M.
Attorney: Buell, Blenko & Ziesenheim

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Title: Metal working apparatus and methods of piercing

Abstract: A method and apparatus are provided for piercing metal members at high temperatures, particularly members containing slag inclusions, by the steps of urging said member, over a piercer point by rolling whereby said point passes through and forms an axial opening in the ingot, said point being formed of an alloy comprising 0.015% to 2% Carbon, about 5% to 65% Cobalt, about 15% to 35% Chromium and up to about 30% iron.

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Inventors: Way, Lewis A. (Columbiana, OH, US)
Williams, Robert C. (Columbiana, OH, US)

Application Number: 036406
Filing Date: 1970-05-11
Publication_date: 1976-06-15
Assignee: Columbiana Foundry Company (Columbiana, OH)
Primary Class(es): 72/209 420/436, 420/440, 420/583, 420/588
Other Classes:
US Patent Ref:

1903952	Apr, 1933	Wissler	75/171.
2126750	Aug, 1938	De Golyer	75/171.
2197098	Apr, 1940	Davis et al.	75/128.
2263020	Nov, 1941	Trantin	75/128.
2799003	Jul, 1957	Nowak	75/171.
3237441	Mar, 1966	Eberle	72/209.

Other Refs: Other References: P. 846, The Making, Shaping and Treating of Steel (1964).
P. 1388, Van Nostrand's Scientific Encyclopedia (1947).