Cracking Analysis of Fuel Injector Holes in Aluminum Cylinder Head of Diesel Engine
The cracking reason of aluminum cylinder head injector hole was analyzed by comprehensive test of aluminum cylinder head injector hole by means of morphology observation,chemical composition analysis,microstructure examination,hardness and mechanical property test,etc.The result shows that the crack originated from the channel wall at the bottom of the nozzle hole of the second cylinder of the cylinder head corresponding to the exhaust side,and is propagated as a fatigue crack until the nozzle hole wall is penetrated.
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