Fracture Reason Analysis of Master Connecting Rod in Diesel Engine
Liu Hanjing
Abstract
Liu Hanjing
Abstract
The fracture reasons for the master connecting rod in diesel engine were analyzed by chemical analysis,SEM observation,mechanical properties test and metallographic examination.The results show that the fracture of the master connecting rod is due to fatigue fracture.The existence of decarburized layer in the surface of the master connecting rod and the defects such as surface dents,folding and cracks are the main reasons for the fatigue fracture of the master connecting rod.The ferrite in the matrix has promoting effects on the propagation of the fatigue crack.
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The fracture reasons for the master connecting rod in diesel engine were analyzed by chemical analysis,SEM observation,mechanical properties test and metallographic examination.The results show that the fracture of the master connecting rod is due to fatigue fracture.The existence of decarburized layer in the surface of the master connecting rod and the defects such as surface dents,folding and cracks are the main reasons for the fatigue fracture of the master connecting rod.The ferrite in the matrix has promoting effects on the propagation of the fatigue crack.
Key concepts: Connecting rod, Fracture (geology), Materials science, Structural engineering, Composite material, Forensic engineering, Engineering, Mechanical engineering