should be selected grinding and profile grinding wheel hard to maintain the required shape precision grinding.
2013年8月16日星期五
Ceramic tool
Traditional ceramic materials are generally taken from nature, such as Jingdezhen soil, after mixing, forming and baking processes made various commodities. The modern high-tech ceramics, also known as special ceramics, it is a synthetic material, such as silicon nitride Diamond blade , high purity. Using modern powder metallurgy manufacturing process, products made with high hardness and high temperature properties.
Materials can be divided metal materials and non-metallic materials. Non-metallic materials and inorganic materials and organic materials are divided into
Ceramic tool
. Regardless of materials whose properties such as melting point, hardness and electrical conductivity, etc. cubic boron nitride on the microstructure, ie, depending on the internal particle binding mode and binding force. Molecular organic material by the weaker binding force, so the low melting point, low hardness. Metal bond by metal material, its molecular bond strength than the bonding force, but lower than a covalent bond and ionic bond is weak, so the melting point and hardness are still not high. Metal carbide and other hard phase WC to link its performance between between metal and ceramic. Ceramic materials are mainly ionic and covalent bonding, the bonding force is relatively strong electrostatic attraction between positive and negative ions or an unshared electron pair, so the melting point, high hardness, with a good insulation resistance, chemical stability and oxidation resistance . This is the ceramic material can cause a cutting tool.
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