Some basic knowledge of abrasive tools

Some basic knowledge of abrasive tools

Abrasives are a general term for abrasives and abrasives, including abrasive products and abrasive products.

Among them, abrasive products are mainly divided into two categories: corundum abrasives and silicon carbide abrasives. Specifically, there are basically the following:

1. Aluminium oxide abrasive, the main component is Al2O3, with medium hardness, high toughness, sharp particles, relatively low price, suitable for processing high tensile strength metals. Microcrystalline corundum abrasives and black corundum abrasives are all derived varieties.

2, white corundum abrasive, its hardness is slightly higher than brown corundum, but the toughness is poor, easy to cut into the workpiece during grinding, self-sharpness, less heat, strong grinding ability, high efficiency. Chrome corundum abrasive is a derivative of its origin.

3, single crystal corundum abrasive, the particles are composed of a single crystal, and has a good multi-edge cutting edge, high hardness and toughness, strong grinding ability, less heat generation, the disadvantage is higher production costs, production Lower, so the price is higher. Zirconium corundum abrasive is also a crystalline compound with a slightly lower hardness, a finer crystal size and good wear resistance.

4, black silicon carbide abrasive, green silicon carbide abrasive, cubic silicon carbide abrasive, silicon carbide abrasive, etc., belonging to silicon carbide abrasive, the main component is silicon carbide SiC, high hardness, brittleness, sharp abrasive grain, good thermal conductivity, Strong wear resistance, suitable for processing hard and brittle metal and non-metal products.

Abrasives usually include two types of ordinary abrasives and superhard materials.

1. A general abrasive tool refers to an abrasive tool made of the above-mentioned ordinary abrasive. According to the abrasive combination form, it is divided into a fixed abrasive tool and a coated abrasive tool, and according to different bonding agents, it can be further divided into a ceramic abrasive tool, a resin abrasive tool, a rubber abrasive tool, a diamond bitter abrasive tool and the like.

2, super-hard material abrasives, mainly with metal powder, metal oxide or CBN and other super-hard materials as fillers, can also be added to ordinary abrasives (such as Al2O3, SiC, etc.), with resin binders or ceramic binders or metals A grinding tool made of a bonding agent.