Westinghouse Electric Corporation

Westinghouse Electric Company LLC

Michael A McClarren

John P Foster

Anand M Garde

Mats Dahlback

Robert J Comstock

John A Catanese

Guirong Pan

Jonna Partezana Mundorff

David Colburn

Terrence Cook

Ronald Kesterson

Dianna Lynn Svec Nuhfer

Hsiang Ken Yueh

James A Boshers

Penney File

Articles, such as tubing or strips, which have excellent corrosion resistance to water or steam at elevated temperatures, are produced from alloys having 0.2 to 1.5 weight percent niobium, 0.01 to 0.6 weight percent iron, and optionally additional alloy elements selected from the group consisting of tin, chromium, copper, vanadium, and nickel with the balance at least 97 weight percent zirconium, including impurities, where a necessary final heat treatment includes one of i) a SRA or PRXA (15-20% RXA) final heat treatment, or ii) a PRXA (80-95% RXA) or RXA final heat treatment.

Zirconium alloys with improved corrosion/creep resistance due to final heat treatments

An automatic stop apparatus for use in combination with a cold-pilger mill to reduce the amount of tube scrap generated during a cold-pilgering operation includes a first control scheme for stopping the advancement of the pilger mill feed carriage and the operation of the mill's upper and lower pilger dies when the feed carriage pushing a tube through the pilger dies is a predetermined distance from the axis extending between the centers of the pair of pilger dies. The predetermined distance is selected to provide that facing end portions of the pushed and pusher tubes are positioned between the pilger dies. A second control scheme stops the retraction of the feed carriage after the feed carriage has moved the same predetermined distance measured from the trailing end of the pusher tube towards the inlet end of the pilger mill so that the next pusher tube provides that the upper and lower pilger dies are again stopped when the facing end portions of the succeeding pushed and pusher tubes are also between the pilger dies.

Automatic cold-pilger mill stop apparatus

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New Alexandria, PA, United States of America

Michael A McClarren