【摘要】 本文通过应力腐蚀和腐蚀疲劳实验，应用光学显微镜和扫描电镜证实工作时水进入活塞内壁，形成蚀坑，从而在交变载荷作用下产生氢致开裂，并由此提出了防止活塞氢致开裂的措施．更多还原

【Abstract】 The failure of the strike piston of hydraulic rock drill was investigated by optical microscopy,SEM,stress corrosion and corrosion fatigue tests.It has been found that,the faiure ofthe piston is due to the According to the experiment results,measures to prevent the piston failure have been suggested更多还原