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为适应罩式退火的特点,本研究以低碳高锰钢为基础,探讨了在罩式退火条件下不同碳锰含量的钢获得双相组织的工艺条件,分析了加热温度、冷却速度及保温时间对金相组织及机械性能的影响。试验钢是用50kg 和150kg 感应电炉冶炼,经热轧、冷轧后在现场罩式退火炉退火。结果表明,在所选定的化学成分范围内,在现有罩式退火条件下能够生产出具有铁素体加8.2～15.1%马氏体及4.2～9.7%珠光体组织的双相钢。该钢具有低屈服、高强度、无屈服延伸的特点。
In order to adapt to the characteristics of the bell anneal, based on the low-carbon and high-manganese steel, this paper studied the technological conditions of obtaining dual-phase microstructure of the steel with different carbon and manganese contents under the hood annealing condition, analyzed the heating temperature, cooling rate and insulation Effect of time on microstructure and mechanical properties. The test steel is 50kg and 150kg induction furnace smelting, after hot rolling, cold annealing in the field hood annealing furnace. The results show that it is possible to produce dual phase steels with ferrite plus 8.2-15.1% martensite and 4.2-9.7% pearlite within the range of selected chemical composition under the existing hood annealing conditions. The steel has a low yield, high strength, no yield extension.