Back (Failure Cases)

1.6568 | 30CrNiMo5-5 broken shaft - 6
1.6568 | 30CrNiMo5-5 broken shaft - 1
1.6568 | 30CrNiMo5-5 broken shaft - 2
1.6568 | 30CrNiMo5-5 broken shaft - 3
1.6568 | 30CrNiMo5-5 broken shaft - 4
1.6568 | 30CrNiMo5-5 broken shaft - 5
1.6568 | 30CrNiMo5-5 broken shaft - 6
1.6568 | 30CrNiMo5-5 broken shaft - 7
1.6568 | 30CrNiMo5-5 broken shaft - 8
1.6568 | 30CrNiMo5-5 broken shaft - 9
1.6568 | 30CrNiMo5-5 broken shaft - 10
1.6568 | 30CrNiMo5-5 broken shaft - 11

1.6568 | 30CrNiMo5-5 broken shaft

Numeric designation1.6568
Chemical designation30CrNiMo5-5
Statebroken shaft
Etching3 % Nital

A white layer of tetragonal martensite has formed near the surface of this shaft as a result of grinding burn. This was caused by slippage in the bearing seat. The new hardening zones led to localised breakouts, which resulted in a fatigue fracture.

Failure Cases

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