Study on Fatigue Mechanical Properties of 30CrMnSiA Bolts After Corrosion
In order to verify the service reliability of 30CrMnSiA bolt on aircraft under corrosive environment,accelerated corrosion environment test was carried out to simulate the actual working state of bolt.The macro and micro corrosion morphology of bolt surface after different corrosion environment periods were analyzed and recorded.Fatigue testing machine was used to test the fatigue and shear mechanical properties of bolt before and after corrosion.The test shows that the corrosion mainly occurs in the middle exposed area of 30CrMnSiA bolt in actual working environment,and the corrosion degree in the middle area increases significantly with the increase of corrosion time,while the actual shear part of the bolt was not affected by corrosion during the 3-year environmental calendar,and the shear mechanical properties had no obvious change.Therefore,whether the aircraft was parked or in flight,30CrMnSiA bolts could meet the requirements of the use of the environment for a three-year calendar period.
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