Abrasive Selection for Grinding Wheels
2026-01-20
Silicon carbide grinding wheels:
Black silicon carbide (C): Suitable for grinding cast iron, brass, lead, and non-metallic materials. It has high hardness and is brittle, making it effective for cutting and grinding brittle materials.
Green Silicon Carbide (GC): With higher hardness, it is suitable for grinding extremely hard materials such as cemented carbides, ceramics, and glass. It can also be used for fine grinding of stainless steel and cemented carbides. When grinding cast iron—especially when the cast iron has high hardness or requires precision finishing—green silicon carbide grinding wheels are the better choice.
Corundum grinding wheels:
Brown corundum (A): High hardness and excellent toughness, making it ideal for grinding metals with high tensile strength, such as carbon steel, alloy steel, and malleable cast iron. For rough grinding and semi-finish grinding of ordinary cast iron, brown corundum grinding wheels are an economical and practical choice.
White corundum (WA): Slightly harder than brown corundum but with lower toughness, its abrasive grains tend to fracture more easily during grinding, resulting in less grinding heat. It is suitable for manufacturing grinding wheels used in precision grinding of quenched steels, high-carbon steels, high-speed steels, and thin-walled components. When grinding cast iron and a higher surface finish is required, white corundum grinding wheels are the better choice.
Chrome corundum (PA): Its hardness is similar to that of white corundum, but it exhibits higher toughness and greater durability. It is suitable for grinding high-strength, high-toughness materials such as stainless steel, bearing steel, and special steels. For grinding high-strength cast irons, chrome corundum grinding wheels demonstrate excellent adaptability.
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