Cemented carbide with alternative binder
AssigneeAB Sandvik Coromant
InventorsJose Luis Garcia, Bartek Kaplan, Veronica Collado Cipres
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Abstract
A cemented carbide including an eta phase and a Ni—Al binder is provided. The Ni—Al binder includes intermetallic y′-Ni3Al -precipitates embedded in a substitutional solid solution matrix of Al and Ni. A weight ratio Al/Ni of between 0.03 to 0.10, wherein a total amount of Ni and Al is between 70 to 95 wt % of the total binder A method of making a cutting tool is also provided.
Claims8
A cutting tool comprising a cemented carbide substrate including tungsten carbide and 3 to 20 wt % binder, the binder including intermetallic y′-Ni3Al-precipitates having an average grain size of between 10 and 1000 nm embedded in a substitutional solid solution matrix having Al and Ni with a weight ratio Al/Ni of between 0.03 to 0.10, wherein a total amount of Ni and Al is between 80 to 95 wt % of a total binder and wherein the cemented carbide substrate includes a volume fraction of eta phase of between 0.8 and 8 vol % and a total carbon content in the cemented carbide substrate, C (wt %), that is below a value X, where X is given by the following equation:
- X
- =
- (
- 0.0617
- *
- wt
-
- %
-
- Al
- wt
-
- %
-
- Ni
- -
- 0.0768
- )
- *
- (
- wt
-
- %
-
- Ni
- +
- wt
-
- %
-
- Al
- )
- +
- 6.1323
- ,
- wherein the wt % Al and the wt % Ni is the amount present in the cemented carbide substrate.
Dependencies are inferred from the claim text.