terminology for abrasives
Commonly used silicon carbide abrasives have two different crystals, one is green silicon carbide, which contains more than 97% SiC, and is mainly used for grinding hard alloy tools. The other is black silicon carbide, which has metallic luster and contains more than 95% SiC, it has greater strength than green silicon carbide but lower hardness,it is mainly used for grinding cast iron and non-metallic materials,the molecular formula is SiC. The hardness of SiC is between corundum and diamond, and its mechanical strength is higher than that of corundum. It can be used as abrasives and some other industrial materials. Industrial silicon carbide was successfully developed in 1891 and was the earliest artificial abrasive.
The terminology of abrasives is widely used in the industry, the following are 20 terms of finishing abrasives:
Abrasive: The material that the object plays a cutting role in grinding, grinding and polishing.
Abrasive Granule: The abrasive is artificially made into a specific particle size and is used to make grinding, polishing and grinding tools for cutting the material margin.
Particle size: the measurement and diameter of the abrasive size.
Micro-powder: ordinary abrasive not coarser than 240 grit, abrasive or super-hard abrasive abrasive finer than 36/54μm.
Coarse abrasive grains: the diameter of abrasive grains with grit size No. 4-220. Abrasives above No. 12 must be processed by special technology and customized in advance.
Granularity number: the grading mark made on the size and diameter of the abrasive according to the implementation standard.
Single crystal: The arrangement of crystal atoms is very regular, with regular appearance and anisotropy.
Polycrystalline: a crystal shape composed of many small crystal grains that tend to be different.
Magnetic matter: a general term for the magnetic properties of magnetically sensitive materials in abrasive grains.
Angle of repose: The angle between the conical surface of the cone and the ground when the abrasive sample falls on the horizontal metal plate through the funnel from a certain height. Generally calculated from the diameter and height of the cone.
Bulk density: the mass of abrasive particles in a unit volume of air in the case of natural accumulation of abrasive particles in g/cm3.
Natural abrasives: Abrasives made directly from natural ore after sorting, crushing, grading or other processing.
Capillary phenomenon: The abrasive particles are installed in a glass test tube with a certain diameter, and the lower end penetrates into the water. The height of the water rise in a given time.
Artificial abrasives: abrasives refined or synthesized by artificial methods.
Specific surface area: the total surface area of a unit mass of abrasive, unit m2/g.
Impact toughness: impact resistance and crushing performance of abrasives.
Compressive strength: the load value when a single abrasive particle is broken under static pressure, in N18.
Free abrasive grains: abrasive grains that are directly ground or polished in a free state 19.
Particle size composition: a combination of graded marks made by a certain nominal particle size number abrasive grain size 20.
Mixed particle size: the abrasive particle size formed by mixing two or more abrasive grains in a set proportion.
Silicon carbide is a relatively common material used in abrasives. It can be divided into a variety of particle sizes. Anyang Huatuo Metallurgy has been engaged in silicon carbide for more than ten years. If you have any needs, please welcome to consult.