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断口-金相直接对照观察表明,以粒贝为主体的15MnVN钢焊缝中的M-A组元,既可以在较低温度下引发解理,又可以在较高温度下转变成韧窝断裂机制中的第二相粒子。
Fracture-metallographic examination shows that the MA component of 15MnVN steel weld, mainly composed of shellfish, can not only initiate cleavage at lower temperature but also transform into dimple fracture mechanism at higher temperature Of second phase particles.