The treatment conditions yielding steel with a natural ferrite-martensite composite structure are proposed. Structural steels having a banded ferrite-pearlite structure after hot rolling are analyzed. It is shown that the strength achievable by the composite is proportional to the volumetric fraction of the strengthening phase. Based on the experimental data obtained as a result of tension and dynamic bending testing, the fracture mechanisms of steels having the ferrite-martensite composite structure are discussed.

中文翻译：

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天然铁素体-马氏体钢复合材料的结构组织与性能

提出了产生具有天然铁素体-马氏体复合结构钢的处理条件。分析了热轧后具有带状铁素体-珠光体结构的结构钢。结果表明，复合材料可达到的强度与强化相的体积分数成正比。基于拉伸和动态弯曲试验获得的实验数据，讨论了具有铁素体-马氏体复合结构的钢的断裂机制。