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1.前言用锰和硅合金化的铁素体—马氏体组织的低碳低合金钢具有良好的强韧塑性、低屈强比、高加工硬化率。这种钢在工业上是优良而廉价的冷加工用材,广泛用于建筑结构、管道、汽车零件、冷拉钢丝、链条、钢筋等结构钢材。例如,以 MnSi 和 Mn2SiV 类型合金化的钢,可以得到变形性和强化的最优组合,用这种低碳低合金的铁素体—马氏体组织的双相钢线材拉拔时,不经铅浴淬火,即可得到高强度钢丝。
1. Introduction Low-carbon, low-alloyed ferritic-martensitic low carbon steels alloyed with manganese and silicon have good ductility, low yield strength, and high work hardening. This kind of steel is an excellent and cheap material for cold working in the industry. It is widely used in structural steel such as building structure, pipelines, automobile parts, cold drawn steel wire, chain, steel bar and so on. For example, the optimal combination of deformability and strengthening can be obtained for steel alloyed with MnSi and Mn2SiV types. When drawn with such a low-carbon, low-alloy ferrite-martensite dual-phase steel wire rod, Lead bath quenching, you can get high-strength steel wire.