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US 9,540,715 B2Granted
Cermet powder
AssigneeH. C. Starck GmbH
InventorsStefan Zimmermann, Benno Gries
Life of this patent
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Abstract
A cermet powder includes a) from 50 to 90 wt-% of at least one hard material, and b) from 10 to 50 wt-% of a matrix metal composition. The wt.-% for a) and b) are based on a total weight of the cermet powder. The matrix metal composition comprises i) from 40 to 75 wt-% of iron and nickel, ii) from 18 to 35 wt-% of chromium, iii) from 3 to 20 wt.-% of molybdenum, and iv) from 0.5 to 4 wt-% of copper. The wt-% for i) to iv) are based in each case on a total weight of the matrix metal composition. A weight ratio of iron to nickel is from 3:1 to 1:3.
Claims16
A sintered cermet powder comprising:
- a) from 50 to 90 wt-% of at least one hard material;
- and
- b) from 10 to 50 wt-% of a matrix metal composition, the wt.-% for a) and b) being based on a total weight of the cermet powder, the matrix metal composition comprising:
- i) from 40 to 75 wt-% of iron and nickel,
- ii) from 18 to 35 wt-% of chromium,
- iii) from 3 to 20 wt.-% of molybdenum, and
- iv) from 0.5 to 4 wt-% of copper,
- the wt-% for i) to iv) being based in each case on a total weight of the matrix metal composition, and a weight ratio of iron to nickel being from 3:1 to 1:3,
- wherein the sintered cermet powder is produced by a process comprising the steps of:
- mixing or milling the at least one hard material powder with the matrix metal composition which is provided as a powder so as to obtain a powder mixture, and
- sintering the powder mixture so as to obtain the sintered cermet powder mixture.
8 more elements
Dependencies are inferred from the claim text.