采用化学成分分析、显微维氏硬度测试、金相显微镜分析及酸洗检测等方法对某型重载齿轮齿面剥落进行了分析。结果表明:磨削过热导致的磨削烧伤是该重载齿轮剥落失效的直接原因;磨削量、砂轮、冷却液、热处理因素等是产生磨削烧伤的重要因素;磨削烧伤的检测应当作为更加重要的一个控制环节,对于重要场合的齿轮,应当提高磨削烧伤的检查频次。 The chemical composition analysis, micro-Vickers hardness test, metallographic microscope analysis and pickling test were used to analyze the spalling of a heavy-duty gear. The results show that the grinding burn caused by overheating is the direct cause of the spalling failure of heavy-duty gear. The amount of grinding, grinding wheel, coolant and heat treatment are the important factors of grinding burn. The detection of grinding burn should be taken as A more important part of the control, the gear for important occasions, should increase the inspection frequency of grinding burns.