Wear resistant coatings for tool dies
AssigneeCorning Incorporated
InventorKrishna Kumar Vaidyanathan
Life of this patent
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Abstract
A tool die for forming a green ceramic body. The tool die has a wear resistant coating that is deposited on a substrate and has an outer or free surface having a morphology that provides a mean roughness in a range from about 0.03 μm up to about 0.8 μm Rq. In one embodiment, the wear resistant coating has multiple alternating layers of fine grained and coarse grained materials. Methods of making the tool die and wear resistant coating are also provided.
Claims14
A wear resistant composite coating for an extrusion die for forming a green ceramic body, the wear resistant composite coating comprising:
- a. a base layer disposed on the surface of the substrate;
- b. a plurality of layers disposed over the base layer, the plurality of layers comprising a first layer of a fine grained material alternating with a second layer of a coarse grained material;
- and
- c. an outer layer of the fine grained material disposed over the plurality of layers, the outer layer having an outer surface, wherein the outer surface has a fine grained equiaxial morphology that has a Rq roughness in a range from about 0.03 μm up to about 0.8 μm Rq.
A method of making a tool die for forming a green ceramic body, the tool die having a wear resistant coating, the method comprising the steps of:
- a. providing a tool die;
- and
- b. depositing a wear resistant coating on a surface of the tool die, the wear resistant coating having an outer surface, wherein the outer surface has a morphology that has a mean roughness in a range from about 0.03 μm up to about 0.8 μm Rq.
A method of depositing a wear resistant layer on a tool die, the method comprising the steps of:
- f. depositing a base layer on a surface of the tool die;
- g. depositing a plurality of layers over the base layer, the plurality of layers comprising a first layer of a fine grained material alternating with a second layer of a coarse grained material;
- and
- h. depositing an outer layer of the fine grained material having over the plurality of layers, the outer layer having an outer surface, wherein the outer surface has a morphology that has a mean roughness in a range from about 0.03 μm up to about 0.8 μm Rq.
Dependencies are inferred from the claim text.