论文部分内容阅读
本文叙述用控制轧制工艺生产具有细晶粒组织的微量合金化高强度高韧性钢板的化学成份和生产工艺。含碳(C≤0.12%)、锰(Mn=0.10～0.14%),并加入少量铌(Nb≤0.05%)及钒(V≤0.10%)的微量合金化钢,采用控制轧制工艺,充分发挥了微量合金元素的强化作用。严格控制板坯的加热温度、开轧温度及钢板的终轧温度,轧程压下率,变形速度等因素,最终获得细品粒的强化组织,使钢材具有良好的综合性能。无需正火处理就可获得屈服强度40kg/mm~2级和45kg/mm~2级的高强韧性钢板。通过试生产的数理统计分析,进一步得出低碳锰铌钢及低碳锰钒铌钢的组织和性能与钢的化学成分、轧制工艺具有密切的关系。
This paper describes the chemical composition and production process of a microalloyed high strength and high toughness steel with a finely grained microstructure controlled by a controlled rolling process. (C≤0.12%), manganese (Mn = 0.10 ~ 0.14%), and adding a small amount of microalloyed steel with a small amount of niobium (Nb≤0.05%) and vanadium (V≤0.10%) using a controlled rolling process Play a role of strengthening the role of trace alloying elements. Strictly control the slab heating temperature, start rolling temperature and the final rolling temperature of steel, rolling schedule reduction rate, deformation and other factors, the final fine grain reinforced organization, the steel has a good overall performance. No normalizing treatment can be obtained yield strength 40kg / mm ~ 2 and 45kg / mm ~ 2 high strength and toughness steel. Through mathematical statistics analysis of trial production, it is further concluded that the microstructure and properties of low carbon manganese and niobium steel and low carbon manganese vanadium and niobium steel are closely related to the chemical composition and rolling process of steel.