Coated cemented carbide bodies

Details Coated cemented carbide bodies Coated cemented carbide bodies

1983-07-29

1986-04-15

Kittle, John E.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428216, 428220, 428547, 428698, 428699, B32B 1504, B32B 702

Patent

active

RE0321117

ABSTRACT:
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.

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"Structure and Wear of Coated Cemented Carbides: TiC, TiN, and Al.sub.2 O.sub.3 ", Gates et al., Report of Fansteel V/R Wesson, 800 Market St., Waukegan, Il. 60085; Presented at International Conference on Trends in Conventional and Non-Traditional Machining, Jun. 6, 1981, Sponsored by Illinois Institute of Technology.

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