低碳双相钢冲击韧性及断裂特征

Impact Toughness and Fracture Properties of a Low Carbon Dual Phase Steel

本文研究了低碳双相钢中不同体积百分比及不同强度比的铁素体、马氏体双相组织对钢的冲击韧性及断裂过程的影响。结果表明:马氏体数量增加使钢的韧性降低,回火温度升高使钢的韧性提高。冲击断口形貌由室温的韧窝型转变为-78℃时以准解理为主及-196℃时全部解理型。

The effects of ferrite-martensite dual phase structures with different voiume fractions and strength rations on impact toughness and fracture process of a low carbon steel are studied. The experiments indicate that the impact toughness is low down as the martensite content increases, and impact toughness increases as the tempering temperature rises; the impact fracture morphology is changed from ductile dimple at room temperature into main quasi-cleavage at - 78 C and all cleavage at - 196C.