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本文遭过对国产09SICrMrMoRe双相钢冲击断裂行为的研究表明,层片型(层片状马氏体与铁素体相间排列)双相组织的冲击韧性优于岛型(岛状马氏体弥散分布于铁素体中)双相组织。层片型双相组织中裂纹萌生与扩展对两相界面敏感性较小。层片型双相组织的韧化作用主要在于层片状马氏休有效比分隔了铁素体,使裂纹扩展途径曲折,消耗较多的塑性变形功。以层片型双相组织为推础,在马氏体基体上分布少量铁素体,对韧性无害。
This article was subjected to 09SICrMrReo 09SICrMrRe dual phase steel impact fracture behavior showed that the lamellar (lamellar martensite and ferrite interphase) biphasic tissue toughness is better than the island (island-shaped martensite dispersion Distributed in ferrite) Biphasic organization. The crack initiation and propagation in the lamellar duplex structure is less sensitive to the two-phase interface. The ductile effect of lamellar duplex structure mainly lies in the fact that lamellar Marsh effect effectively segregates ferrite, makes the crack propagation path twists and turns and consumes more plastic deformation work. Based on the lamellar duplex structure, a small amount of ferrite is distributed on the martensite matrix, which is not harmful to toughness.