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Failure analysis of diesel engine transmission shaft crack

The results are as follows (1) Through spectral analysis, the chemical composition of the sample is more than the requirements of GB / t5216-2014. In sample 1, the chemical composition was analyzed by three times direct reading spectrum. The content of C element (mass fraction,%) was 1.5, 0.5 and...

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Analysis of common defects in castings

Casting porosity This is a small cavity formed by the gas which can not escape during the solidification of metal. The inner wall of the cavity is smooth and contains gas. It has a high reflectivity to the ultrasonic wave. However, because it is basically spherical or ellipsoidal, that...

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