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一、铸石为什么比金属材料耐磨铸石几乎是由单种硅酸盐矿物(普通辉石)组成的。这种矿物晶体的莫氏硬度为6～6.5。由于这些矿物晶体极为细小,在显微镜下,可以看到铸石是由0.05～0.1毫米的普通辉石球体或羽毛状雏晶交织而成。这种内部结构的紧密性,就大大提高了铸石的硬度,其莫氏硬度达到7～8。任何物质硬度愈大,耐磨性能就愈好。从原子-分子结构的观点来看,这种硅酸盐矿物硅与氧原子的结合,是依靠一种很强的作用力相互联系着的(化学上叫共价键),
First, why cast stone than metal wear-resistant cast stone is almost composed of a single silicate mineral (pyroxene) composition. This mineral crystal has a Mohs hardness of 6 to 6.5. Because these mineral crystals are extremely small, you can see from the microscope that the cast stone is made by interlacing ordinary pyroxenes or feathery crystallites of 0.05 to 0.1 mm. The tightness of this internal structure greatly increases the hardness of the cast stone, with a Mohs’ hardness of 7-8. The greater the hardness of any material, the better wear resistance. From an atomic-molecular structure point of view, the silicate mineral combines oxygen with oxygen atoms, which are chemically interconnected (chemically called covalent bonds) by a strong force,