论文部分内容阅读
研究了循环条件对ＹＧ２０硬质合金热冲击裂纹扩展的影响。结果表明，随着循环温度的升高和冷却速率的增加，裂纹萌生的孕育期缩短，裂纹扩展速率增加。扫描电镜观察发现，热冲击断口中存在疲劳条纹。
The effect of cycling conditions on the thermal shock crack growth of YG20 cemented carbide was investigated. The results show that with the increase of the recirculation temperature and the cooling rate, the incubation period of crack initiation is shortened and the crack propagation rate increases. Scanning electron microscopy showed that there were fatigue streaks in the thermal shock fracture.