超低碳钢铁素体轧制工艺及其轧后显微组织

The Ferrite Rolling Techniques and Microscopic Structure of Ultra Low Carbon Steel

采用 THERMECMASTOR-Z 热/力模拟试验机研究了超低碳钢在铁素体区轧制过程的形变特征和流变应力,采用双段压缩试验方法研究了不同变形温度、道次间隔时间和变形程度对钢的流变应力和组织的影响。结果表明:采用铁素体轧制工艺,在800～900℃时流变应力与奥氏体轧制相近,第七道次轧制的累积应变是设定应变的5.08倍;与常规轧制相比细化了晶粒尺寸。

To address the characteristics of deformation behavior and flowing stress of ultra low carbon steel in the hot-strip mill processing, a set of simulations were performed with T -Z thermo dynamic simulator. Furthermore, the effects on the steel flowing stress and metallic structures resulted from different deformation temperatures, intervals and extend had been investigated by dual compressing experimental method. These data indicate that The flowing stress deformed during 800--900 ℃ tends to be the same level with the value at austenite deformation region. The accumulated strain at the Tth pass is 5. 08 times as much as the designed strain when applying ferrite rolling techniques, which is preferred for refined crystallization.