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护环钢经循环变形后,组织中出现了ε马氏体和形变孪晶以及平面状分布的位错;变形量大时在碳化物粒子周围形成位错塞积和缠结。疲劳断裂特征为疲劳条纹、韧窝及类似准解理状形貌特征。
Retaining ring steel after cycle deformation, the organization appeared ε martensite and deformation twins and planar dislocation distribution; large amount of deformation in the formation of dislocations and entanglement around the carbide particles. Fatigue fracture is characterized by fatigue streaks, dimples and similar quasi-cleavage morphology.