对油田钻机断裂吊钩的宏观形貌、吊钩材质、金相组织和吊钩强度校核几方面进行了研究.其断裂的原因是实际起重载荷与铭牌标注的额定起重载荷不符,吊钩起重量达不到3.2吨；操作者在操作使用过程中使用不当,未完全依照操作规程,出现冲击载荷,导致产生脆断.%The macro-morphology of oilfield rig hook fracture, hook material, microstructure and hook strength check were studied. Causes of the fracture are that the actual lifting load and the nameplate rated lifting load do not match and the hook lifting capacity is less than 3.2t; operators do not use properly and are not fully in accordance with the operating procedures during operation and use so that impact load appears, resulting in brittle fracture.
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