Cemented carbide for oil and gas applications with toughness...

Details Cemented carbide for oil and gas applications with toughness... Cemented carbide for oil and gas applications with toughness...

2005-04-12

2005-04-12

Mai, Ngoclan T. (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

C075S241000

Reexamination Certificate

active

06878181

ABSTRACT:
A cemented carbide with excellent properties for oil and gas applications regarding resistance to the combined erosion and corrosion synergistic effects at temperatures between −50 and 300° C. and toughness. This object has been achieved with a cemented carbide containing, in weight %, 8-12 Co+Ni with a weight ratio Co/Ni of 0.25-4, 1-2 Cr and 0.1-0.3 Mo wherein essentially all of the WC grains have a size <1 μm and with a magnetic cobalt content between 80 and 90% of that chemically determined.

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European Search Report dated Nov. 2003.

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