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FAILURE ANALYSIS OF 30CrMnSiA STEEL BOLT

WU Wei(Phys.& Chem.Lab.of CAMA,Luoyang 471009,China)  
The bolt was ruptured during assembly.We were observing the bolt macro-morphology of fracture surface,analyzing micro-morphology zone.With bolt's machining technics and assembling technics,we analyzed and discussed assembling technics of the bolt especially.At last,found out the reason of the bolt failure.
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