![]() ![]() Silicon carbide, SIC, with a hardness of about 2,500 HV, is a widely used abrasive for grinding papers for mainly non-ferrous metals. ![]() Tests have shown that the high material removal, together with a shallow scratch depth, is obtained because of the many small cutting edges of polycrystalline diamonds. Different types of diamonds are available. That means it can easily cut through all materials and phases. Diamonds are one of the hardest known materials, as they have a hardness of approximately 8,000 HV. The removal rate in grinding and polishing is closely related to the abrasives used. A prerequisite is to have an idea of how a ductile or brittle material will perform. Place the material on the Y-axis according to any previous experience. Unlike hardness, ductility is not easily defined in precise numbers.ģ. Move up or down, depending on the ductility of the material. The shape of the Metalogram results from soft materials generally being more ductile and hard materials usually being more brittle.Ģ. The values are not shown in a linear progression, because the variety of preparation methods for softer materials is greater than for hard ones. The X-axis represents the hardness in Vickers (HV). This property expresses how the material responds to mechanical abrasion. Ductility: The ability of a material to deform plastically is important for grinding and polishing.Hardness: T he easiest attribute to measure but is not sufficient information about a material to find the correct preparation method.How to select a preparation method The Metalogram displays materials according to specific physical properties: hardness and ductility. Grinding stones and diamond grinding discsģ ways to improve your process when cutting large piecesĦ ways to improve the speed and efficiency of your cuttingħ ways to optimize cutting liquid for optimal sectioning ![]()
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