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研究了YG8硬质合金热冲击疲劳裂纹的萌生机制。试验结果表明，热冲击疲劳裂纹的萌生与WC／Co相界面微孔洞的形核、长大和连通有关。文中还提出了微孔洞形核和长大的位错模型。
The mechanism of thermal shock fatigue crack initiation of YG8 cemented carbide was studied. The experimental results show that the initiation of thermal shock and fatigue crack initiation is related to the nucleation, growth and connectivity of micropores at the WC / Co interface. The paper also proposed a micro-hole nucleation and growth of the dislocation model.