There are many kinds of metal bonds applied in diamond tools, for example, the cemented carbide bond whose skeleton is tungsten carbide, and Fe-based bond whose composition is mainly Fe and Ni. But the most widely used metal bond is bronze.
The bond material used in metal-bonded diamond tools can be Cu-based alloy, Co-Ni alloy, Fe-based alloy and carbide-based alloy. Bronze bond material is a kind of Cu-based alloy, and is widely used in metal-bonded diamond tools’ manufacture.
A diamond blade consists of a blade core and some diamond segments, and a diamond segment consists of a working layer (containing diamonds for cutting) and a transitive layer. The transitive layer has no diamonds, and is a pure bond layer which connects the working layer to the core of a diamond blade.
Normally, diamonds (synthetic or natural) for industrial uses are small-size grains, and are difficult to be directly used as tools. They are usually fixed on the valid working parts of a tool via some kinds of bond materials or by some other special means to form a kind of tool, which has a certain shape, strength and uses. These tools are normally called diamond tools.
The bond of a diamond tool is mainly determined by the tool’s use. There are mainly three types of bond: resin, ceramic and metal.