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US 2014/0370324 A1Published application
Cermet Coating and Coated Metal Body Having the Cermet Coating, Method of Producing Cermet Coating, and Method of Producing Coated Metal Body
AssigneeNational Institute for Materials Science
InventorsMakoto Watanabe, Seiji Kuroda, Masayuki Komatsu
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Abstract
A cermet coating includes a hard phase and a binder phase that binds the hard phase, wherein the hard phase includes a carbide phase composed of at least one type of WC and CrC; and the binder phase includes at least one type of metal phase selected from Co, Ni, NiCr, and CoCr, has a structure of a metal polycrystalline body, and is bonded directly to a metal substrate.
Claims6
A cermet coating comprising:
- a hard phase;
- and
- a binder phase that binds said hard phase,
- wherein said cermet coating is bonded directly to a metal substrate;
- said hard phase comprises a carbide phase composed of at least one type of WC and CrC;
- and
- said binder phase includes at least one type of metal phase selected from Co, Ni, NiCr, and CoCr, and has a structure of a metal polycrystalline body.
4 more elements
A method of producing a cermet coating, the method comprising:
- a step of forming, on a metal substrate, a precursor coating including a carbide phase and an amorphous binder phase composed of a metal phase by accelerating composite particles of said carbide phase and said metal phase to a rate of 500 m/s or higher by a gas stream and also heating to a temperature equal to or below the melting point, using a warm spray process, thereby causing said composite particles to collide with said metal substrate in a continuous manner;
- and
- a step of recrystallizing said metal phase into a polycrystalline body by heat treating said precursor coating in an inert atmosphere composed of at least one type of argon and helium,
- wherein said carbide phase comprises one or two types of WC and CrC, and
- said metal phase comprises at least one type selected from Co, Ni, NiCr, and CoCr.
2 more elements
Dependencies are inferred from the claim text.