Which of the valve materials are suitable for making grinding tools

The selection of grinding tool materials should be determined by the material and performance of the valve grinding parts. The grinding tool material should have the characteristics of fine and uniform organization, good sand embedding performance, good wear resistance, sufficient stiffness, no deformation, and softer hardness than the grinding part< br /> There are several materials commonly used for making grinding tools< br /> Cast iron: Cast iron contains flake graphite, which has good wear resistance and lubrication, high strength, and also has advantages such as low cost and easy processing. Therefore, cast iron grinding tools are suitable for grinding workpieces made of various materials such as hard alloys, quenched steel, non-ferrous metals, etc. They are also suitable for sanding, sanding, and sanding cloth grinding. The materials used for cast iron fittings are gray iron and nodular cast iron, and the general hardness is HB 120~220. Cast iron grinding tools can ensure quality and have high grinding efficiency, making them widely used< br /> Low carbon steel: Low carbon steel has greater toughness than cast iron and can adapt to workpieces such as slender circular holes, conical holes, and threads that are difficult to grind with cast iron. Low carbon steel is generally used as a rough grinding material< br /> Copper: Copper has high toughness and good wear resistance, making it suitable for rough grinding valves with large machining allowances and low roughness requirements. It can serve as a low-carbon steel grinding tool (but with high cost, it is generally rarely used)< br /> Aluminum: Aluminum is softer than copper, suitable for fine grinding of soft metals such as copper< br /> Lead, Babbitt alloy: suitable for polishing and grinding workpieces made of soft steel or other soft materials< br /> Glass: The texture of glass is hard and brittle, suitable for grinding and polishing workpieces, especially for precision grinding of hardened steel< br /> Asphalt: Asphalt has a soft texture and is suitable for grinding and polishing brittle and hard materials such as glass and crystal. It is also suitable for precision polishing of hardened steel. Asphalt has strong adaptability to the shape of the workpiece< br /> Leather, felt, polyester fabric: Soft texture, commonly used for polishing workpieces. The polyester fabric is flat and uniform, and the pad is placed on a flat grinding tool, achieving good results in precision grinding and polishing< br /> In order to save materials and reduce the number of grinding tools, they are often made into dual-use tools, which can be coated with abrasive and can also be used to support sandcloth or sandpaper. A grinding tool specifically designed to support sandcloth or sandpaper, usually made of carbon steel or cast iron