Carbide Tool Coating Structure Classification

Carbide tool coating structure classification can be divided into hard coated tool and soft coated tool,depending on the nature of the coating  material. According to the different coating methods, the classifications include PVD and CVD.

(1) Single coating structure: also known as the conventional coating, the thin film is made into a particular compound or solid material.

(2) Multi-layer coating structure: adopting multi-layer methods, taking advantage of single-layer coating method and showing extra efforts in improving performance regarded to micro-hardness, high-temperature oxidation resistance and so on.

(3) Graded coating structure : successfully control the crack, gradually expanded its internal trends , while minimizing thermal stress , preventing the material from the surface to the base of cracks caused by failure of the expansion , improved defect carbide tools .


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