2010•Die and Mould TechnologyRequires access
Failure analysis of the spring in automotive stamped die
HU Guang-hon
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Abstract
In order to find the failure cause of a valve spring in an automotive panel stamping die,the fracture region on the spring is examined by chemical composition analysis,metallography,hardness test and SEM.The results showed that the fatigue crack initiation caused by high alternative stress appears in the inner surface of the spring and the propagation of the cracks results in early fatigue fracture of the spring.