Cemented carbide for oil and gas applications with toughness factor
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.
1. A cemented carbide comprising, in weight %:
8-12% Co+Ni, with a Co/Ni weight ratio of 0.25-4;
1-2% Cr;
0.1-0.3% Mo;
wherein essentially all of the WC grains have a size <1 μm, and with a magnetic saturation cobalt content which is 80-90% of the chemically-determined cobalt content.
2. The cemented carbide according to claim 1 , further comprising, in weight %:
3-4% Co;
6-8% Ni;
1-1.5% Cr;
0.1% Mo; and
balance WC.
3. The cemented carbide according to claim 2 , wherein the composition comprises in weight % 3.5% Co, 7% Ni and 1.3% Cr.
4. The cemented carbide according to claim 1 , wherein the composition comprises in weight % 6-7% Co and 2-3% Ni.
5. The cemented carbide according to claim 4 , wherein the composition comprises in weight % 6.6% Co and 2.2% Ni.
6. A pressure and flow control component comprising, at least in part, the cemented carbide of claim 1 .
7. The component of claim 6 , wherein the component comprises a choke trim compartment.