The great toughness of M/B duplex microstructure in GCr15 steel is mainly due to the blocking effect of lower bainite on crack propogation, and is relate...

• 轴承钢中M／B复合组织对强韧性的主要贡献应归功于下贝氏体对裂纹扩展的阻碍作用，同时还与下贝氏体在组织的分布有关。