During the maintenance of the submersible sewage pump, an axial crack was found on the pump’s main shaft; what could be the cause?
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The material is 2cr13; what is the reason for this?
It’s probably a material defect; such a situation shouldn’t occur mechanically
Material defects – 2Cr/3Cr issues occur frequently, but to still be able to supply you products with cracks this long is simply unbelievable!
There are issues with the craftsmanship, and the material chosen is inappropriate!
Everything you said is correct; it’s a material defect. Unethical business owners – please expose them
This is why the manufacturer uses low-cost welded pipes.
The material itself is fine; the problem lies in the inappropriate forging and heat treatment processes. An excessively high normalizing temperature or too rapid cooling rate can both cause cracks.
They are generally hollow, thick-walled tubes, with only the shaft end being solid.