Three dimensional printing of cermet or cemented carbide
AssigneeSandvik Intellectual Property AB
InventorJohn De Flon
Life of this patent
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Abstract
The present invention relates to a powder for three-dimensional printing of a cermet or a cemented carbide body. The powder has 30-70 vol % of the particles that are <10 μm in diameter. The present invention also relates to a method of making a cermet or cemented carbide body. The method includes the steps of forming the powder, 3D printing a body using the powder together with a printing binder to form a 3D printed cermet or cemented carbide green body and subsequently sintering the green body to form a cermet or cemented carbide body.
Claims7
A method of making a 3D printed cermet or cemented carbide body, said method comprising the steps of:
- mixing a cermet or cemented carbide raw powder and organic binder;
- spray drying said raw powder and thereby forming a granulated raw powder;
- pre-sintering said spray dried raw powder, removing said organic binder and thereby forming a pre-sintered granulated powder with an average porosity of the cermet and/or cemented carbide particles with a diameter of ≥20 μm is 10-40 vol %;
- milling said pre-sintered granulated powder until 30-70 vol % of the cermet and/or cemented carbide particles are <10 μm in diameter to thereby form a powder;
- 3D printing a body using said powder together with a printing binder to thereby form a 3D printed cermet or cemented carbide green body;
- and
- sintering said green body to form a 3D printed cermet or cemented carbide body.
Dependencies are inferred from the claim text.