How to repair a piston compressor crankshaft? Can a repair layer with cracks still be used?
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The crankshaft shaft diameter was reduced and then thickened through cladding, but minor cracks were detected using dye penetrant testing. Can this crankshaft still be used? My opinion is: 1. If the crack is only in the surface layer (the layer that thickens during the repair process), remove that layer, repair it using a different method, and if no cracks are detected after inspection, it’s acceptable. 2. If the crack has reached the base material, it can no longer be used. Am I correct? Additionally, there are a few other issues: 1. How to determine the crack depth, and how to determine whether the crack has reached the base material? I heard that ultrasonic testing (UT) works; has anyone who has used it shared their experience? 2. Regarding the repair techniques for crankshafts, from what I’ve researched, spraying is the best option; is welding acceptable? Please help to clarify this. Bro, thanks.
Any cracks represent a safety hazard. Also, the crankshaft substrate and alloy need to be compatible, and the durability of the sprayed coating isn’t very reliable either. We can chat in detail on WeChat at 17817601213 to learn from each other*.
We have encountered situations where it was necessary to grind it off and coat it again
Was color flaw detection done before spraying?