H系列柴油机增压器法兰面紧固螺母开裂分析  

Crack failure analysis of nut in H series diesel engine turbocharger flange

作　　者：马鸣 MA Ming(Shanghai New Power Automotive Technology Co.,Ltd.,Shanghai 200438,China)

机构地区：[1]上海新动力汽车科技股份有限公司,上海200438

出　　处：《柴油机设计与制造》2024年第2期49-52,共4页Design and Manufacture of Diesel Engine

摘　　要：以某公司H系列柴油机增压器法兰面紧固螺母开裂事故为例,采用面向过程的分析原则,通过断口分析、化学分析、金相分析及硬度检测等手段,查明了紧固螺母开裂源于原材料线材热轧裂纹,同时指出了螺母质量控制过程中的不足,并提出了相应的改进建议。不同于专注于故障件检测的面向对象模式,面向过程的分析将零部件失效分析置于“设计—制造—使用”的具体过程中,其检测活动更具针对性,结果更高效、更准确。Taking a cracking accident of the fastening nut on the flange surface of the H-series die-sel engine turbocharger as an example,using the process oriented principle,through fracture analysis,chemical analysis,metallographic analysis,and hardness testing,it was found that the cracking of the fastening nut originated from the hot rolling crack of the raw material wire.At the same time,the short-comings in the quality control process of the nut were also pointed out,and corresponding improvement suggestions were proposed.Unlike the object-oriented pattern that focuses on fault component detection,process oriented analysis places component failure analysis in the specific process of"design-manufacturing-use",making its detection activities more targeted,resulting in more efficient and accu-rate results.

关 键 词：柴油机增压器 紧固螺母 面向过程原则 开裂失效 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]