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.
Claims32
1-26. (canceled)
A 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.
A process for producing a cermet powder, the process comprising:
- a) mixing or milling at least one hard material powder with a matrix metal composition provided as a powder so as to obtain a powder mixture, 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;
- and
- b) sintering the powder mixture so as to obtain a sintered powder mixture.
Dependencies are inferred from the claim text.