ABSTRACT: With the development and application of various superhard material tools with excellent properties, a series of coated superhard abrasive products are developed. All these products are based on the vacuum micro evaporation coating technology. The superhant abrasives include diamond with single layer coating such as Ti coated or W coated diamond. Superhard abrasives with alloy-coating such as Ti/Cr coated diamond, superhard abrasives with electroplated coating layer after the vacuum micro evaporation coating. Such as Ti/Ni compound coated diamonds. These coated products ale used for making sintered, soldered and resin bonded tools. They have remarkable effects on improving tools’quality, reducing manufacture costs, and developing new varieties of products. Because of high coating costs and dulling of Ni-coated or Cu-coated superhard abrasive, a new product with corundum-coating layer used for resin bonded tools has been recently developed successfully. Because this product can overcome these shortcomings, it’s a new replacing product for resin bonded tools.

KEYWORDS: superhatd material, metallization, coating