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钢材是在高技术控制下生产的材料,它的品质均匀,强度高,有一定塑性和韧性,具有承受冲击和振动负荷的能力。因此广泛用于机械工业和民用建筑工程中。钢的主要成分是铁和碳,它的合碳量在2％以下,钢在冶炼中还有难以除净的少量硅、锰、磷、硫、氧和氮,其中磷、硫、氧、氮对钢材性能产生不利影响,为有害杂质。钢中的铁和碳对钢材性能起主导作用。碳含量提高,强度和硬度相应提高,而塑性和韧性则降低。硫是钢中很有害的元素,它的存在降低各种机械性
Steel is a material that is produced under the control of high technology. It is uniform in quality, high in strength, has some plasticity and toughness, and has the ability to withstand shock and vibration loads. Therefore widely used in machinery industry and civil construction projects. Steel is the main component of iron and carbon, its combined carbon content of 2% or less, there are smelting steel difficult to remove a small amount of silicon, manganese, phosphorus, sulfur, oxygen and nitrogen, including phosphorus, sulfur, oxygen, nitrogen Negative impact on the performance of steel, as harmful impurities. Steel and carbon in steel play a leading role in the performance of steel. Increased carbon content, increased strength and hardness, and decreased ductility and toughness. Sulfur is a very harmful element in steel, and its presence reduces various mechanical properties