Types and functions of superhard abrasuve bond
Superabrasives are abrasives made of artificial diamond or cubic boron nitride superabrasives. Superabrasive tools are widely used in cutting, grinding and polishing of metals, non-metals, optical glass and other materials. The quality and performance of superhard abrasive tools are not only related to the abrasives, but also affected by the quality and type of the bond. Here is the detail about the bond of superhard abrasive tools.
List of superhard abrasive bonding:
Bond Name Code Features Usage Metal bond M has high bonding strength and long grinding life. It is suitable for high-speed grinding, single-edged tool grinding, small drill spiral groove grinding, plunge grinding, form grinding and electrolytic grinding, etc. Resin bond S/B has high strength, good elasticity and good self-sharpening. It is suitable for fine-grained grinding wheels and polishing wheels. It is often used for edge grinding, cylindrical grinding and surface grinding. Ceramic bond V has high grinding efficiency and shape. Good retention, high durability, and good heat dissipation. Suitable for grinding metal and non-metallic materials. Long service life, easy to trim. Electroplating bond E has high precision and can be made into complex-shaped grinding tools. Suitable for high-speed fine grinding and forming. Grinding, suitable for high-precision processing such as XYZ three-coordinate grinder. The brazing bond Y has high strength and good heat resistance, and is suitable for high-speed rough machining and cutting and grinding of ductile iron and gray iron.
The function of bond
The bond of superabrasive tools is a material that combines superabrasives to form a fixed-shaped abrasive layer. The selection and quality of the bond directly affects the performance and life of superabrasives. Different types of bond bring different characteristics and performance to superhard abrasive tools.
Metal bond is the most common and widely used bond in superhard abrasive tools. Commonly used metal binders include bronze, nickel, cobalt, iron and other metals. The advantages are simple production process, stable processing performance, and good wear resistance, strength and conductive properties.
The application of resin bond in superhard abrasive tools is mainly represented by phenolic and polyester resins. Compared with metal bond, superabrasive tools made of resin bond have excellent processing accuracy and surface finish. In addition, resin bond have better heat resistance and dynamic strength than metal bond
Ceramic bond are mainly represented by alumina ceramics. The main components of ceramic bond include silicate, alumina, calcium oxide, magnesium oxide and other chemical components. Compared with metal bond and resin bond, superhard abrasive tools made of ceramic bond have the advantages of high hardness, high strength and high temperature stability. In addition, ceramic bonds can also increase the corrosion resistance and chemical resistance of superabrasive tools. However, the ceramic bond manufacturing process is complex and costly. Due to its brittleness, ceramic bond superabrasive tools are relatively fragile and are not suitable for use in high-speed and efficient processing environments.
Electroplating bond refers to a bond in which superhard abrasive particles are directly fixed on the abrasive through electrodeposition. Unlike traditional welding bonds, electroplating bonding does not require high-temperature heating during processing, so the bonding force between the bonding agent and the superhard particles is stronger. Superabrasive tools made of electroplated bond have extremely strong adhesion and high-precision processing performance.
The brazing bond uses brazing material to connect superhard particles and the substrate, and has the advantages of simple manufacturing process and high production efficiency. In addition, the brazing bond also has the characteristics of good wear resistance. However, the use range of brazing bonds is limited by the range of material selection, and because the heat required for brazing is large, it is difficult to apply to the production of smaller superhard abrasive tools.
The selection of bond for superhard abrasive tools requires scientific and reasonable selection based on processing requirements and material characteristics. Although different bond have different advantages and disadvantages, each bond can provide its greatest value within a specific application range.