机械产品在服役过程中,由于种种原因还未达到设计使用寿命就丧失或部分丧失既定功能的现象,称为早期失效。若使用寿命已达到设计要求而丧失使用性能的现象,称为正常失效。失效分析是指对机械产品的设计、材料、冷热加工、安装及使用维护等,进行调查、实验及综合分析,探讨失效的主要原因和规律,研究和 Mechanical products in the service process, due to various reasons have not yet reached the design life of the loss or loss of the established function of the phenomenon, known as early failure. If the service life has reached the design requirements and loss of performance phenomenon, known as the normal failure. Failure analysis refers to the mechanical product design, materials, hot and cold processing, installation and use of maintenance, etc., to conduct investigations, experiments and comprehensive analysis of the main reasons and laws of failure, research and