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1、 Structure of electroplated diamond and CBN products
(1) The overall structure of electroplating products of superhard materials generally includes three parts: working layer, transition layer and substrate, while the structural feature of electroplating products is that there is no over coating, which is generally composed of two parts: electroplated layer and substrate layer.
(2) Working layer (electroplated layer)
It is composed of superhard material and electroplated metal bond. The particles of superhard material are consolidated in the metal coating in dispersion state. It is the working part and plays the role of grinding.
(3) Matrix
Generally, it is made of steel by machining, which requires a certain direction, shape, dimensional accuracy and surface finish. The shape of electroplated products depends on the shape of the substrate. It supports the electroplated layer and is easy to install and use.
2、 Shape characteristics
The other characteristic of electroplating products of superhard materials is the special shape. The electroplating method can be used to manufacture all kinds of tools with special profile, or very thin, very small, and high geometric and dimensional accuracy requirements. These tools are often used for high-precision machining of special shape parts. The working layer of electroplated products is generally thin, which is another feature of its structure.
3、 Characteristics of electroplating superhard products
(1) Concentration
The concentration of abrasives in electroplating products of superhard materials is very high, generally at 200%. The volume ratio of abrasives is about 50%, even higher, up to 65%.
(2)Binding force
Among all kinds of superhard products, the working layer of electroplated products has the most tight metal bond, the most sufficient contact, the most solid consolidation and the most controlling force. It is because of the strong binding force that the electroplating products are allowed to use high concentration without premature falling off.
(3)Porosity
The porosity of electroplated products is considered to be almost zero.
(4) High hardness
The electroplating products of superhard materials are usually electroplated with nickel or nickel cobalt alloy as binder. This kind of metal bond has a high hardness (HRC = 40). In addition, the structure is compact and the bonding force is strong, which makes the overall hardness of the working layer significantly higher than other abrasives.
4、 Characteristics of molding performance
Because electrodeposition is the continuous growth of metal ions next to the substrate surface, and under the appropriate electroplating process conditions, it can ensure good uniform plating ability and deep plating ability, so that the distribution of metal coating on the substrate surface is complete, and the sole plate degree is even, so what shape is the substrate to be plated, and what shape the formed coating can maintain. For all kinds of complex shape and special surface products, problems that cannot be solved by other forming methods can be easily solved by electroplating forming method. Excellent forming performance is one of the most significant characteristics of electroplating process.
5、 Use properties
The superhard abrasives in the working layer of electroplated products are generally single-layer. For single-layer electroplated products, the abrasive exposed about 1 / 3 of its diameter, so the cutting is sharp, easy to remove chips, small friction and less heat. The characteristics of electroplated products are high machining efficiency, high grinding ratio, good shape retention and high machining accuracy