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US 4,357,382 AGranted
Coated cemented carbide bodies
AssigneeFansteel Inc.
InventorsJohn B. Lambert, Mortimer Schussler
Life of this patent
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AssigneeFansteel Inc.
InventorsJohn B. Lambert, Mortimer Schussler
Estimating the term…
A process for increasing the resistance to wear of the surface of hard metal parts subject to wear, such as a cutting blade of metal cutting tools, and the product which results from the process, which includes coating the surface of the hard metal, for example, cemented carbide articles with a first layer comprised of one or more layers of a metallic carbide or nitride in a total thickness ranging from 0.01 to 10 .mu.m, a second layer comprised of one or more layers of a refractory oxide, such as an oxide of aluminum, zirconium, silicon, calcium, magnesium, titanium, and hafnium, and stabilized zirconium oxide in a total thickness ranging from 0.5 to 10 .mu.m, and depositing over the refractory oxide coating a third layer comprised of one or more layers of a nitride, carbonitride, oxynitride, oxycarbide or oxycarbonitride and boride of such metals as titanium, zirconium, hafnium, aluminum and silicon in a total thickness ranging from 1 to 10 .mu.m. The process may include transitional layers to optimize the adherence of the various layers.
A coated article for cutting tool and wear resistant applications which comprises a hard metal substrate and an abrasion and cratering resistant multiple layer coating on at least a portion of said substrate, said coating comprising:
A coated article for cutting tool and wear resistant applications as defined in claim 16 in which the third layer comprises a composite coating on said second layer, said composite coating including a layer of titanium carbide, a transition layer containing titanium carbonitrides overlying said layer of titanium carbide, and a layer of titanium nitride overlying said transition layer.
A coated article for cutting tool and wear resistant applications which comprises a substrate and a coating on at least a portion of said substrate, said coating comprising:
A coated article for cutting tool and wear resistant applications which comprises a substrate and a coating on at least a portion of said substrate, said coating comprising:
Dependencies are inferred from the claim text.