Cemented carbide for oil and gas applications

Details Cemented carbide for oil and gas applications Cemented carbide for oil and gas applications

1999-06-29

2000-07-11

Mai, Ngoclan

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75242, C22C 2908

Patent

active

060866500

ABSTRACT:
The present invention relates to a cemented carbide with excellent properties for oil and gas applications including resistance to the combined erosion and corrosion synergistic effects at temperatures between -50 and 300.degree. C., preferably 0-100.degree. C. The cemented carbide contains, in wt %, 2.5-4.5 (Co+Ni) with a weight ratio Co/Ni of about 3, 0.25-0.6 Cr and 0.1 Mo wherein essentially all of the WC grains have a size <1 .mu.m and wherein the total carbon content is in the interval of 6.13-(0.061.+-.0.008).times.binder phase (Co+Ni) content (wt-%).

REFERENCES:
patent: 3746519 (1973-07-01), Hara et al.
patent: 3993446 (1976-11-01), Okawa
patent: 4466829 (1984-08-01), Nishigaki et al.
patent: 4497660 (1985-02-01), Lindholm
patent: 5902942 (1999-05-01), Maderud et al.
Swedish Search Report for Swedish Application No. 9802324-5.

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