Diamond coated tools and wear parts

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428212, 428156, 428172, 428408, 428472, 428697, 428698, 428699, C30B 2904

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055851762

ABSTRACT:
A diamond-coated tool or wear part and a process for making them. The process includes a sintering step. In that step, a substrate is sintered in an atmosphere and for a time and at a temperature so that superficial, exaggerated grain growth is promoted that imparts a surface roughness which may serve as anchoring sites during a subsequent diamond coating step which is performed by a vapor deposition technique. The diamond-coated tool or wear part includes a large grain substrate surface, and a high bond strength between the diamond coating and the substrate surface.

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