研究了15MnVN钢粒状贝氏体焊缝的解理断裂机制。对断口-金相直接对照试样的观察表明,粒状贝氏体焊缝的解理是由M-A组元引发的。M-A组元等效直径的分布控制了粒状贝氏体焊缝的解理断裂应力。
The cleavage fracture mechanism of acicular bainitic weld metal insteel 15MVN has been investigated, SEM observation of a special specimen for re-vealing simultaneously fracture surface and microstructure shows that the cleavageof the weld metal is initiated by M-A constituent. The 95th percentile equivalentdiameter of M-A constituent controlls the cleavage fracture stress of the weld me-tal.
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