Methods for dealing with cracks in composite panels
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It is a vertical tank with an operating pressure of 2.0 MPa and a temperature of 160°C. During coloring, many cracks were found in the welds of the inner surface cylinder and in the welds of the reinforcement rings on the nozzles. The material used is 16MnR, with a 3 mm thick 304 stainless steel cladding layer. What measures should be taken to eliminate these cracks?
After removing the cracks with a grinder, perform patch welding.
Our company often encounters this situation: first, the cracks are cut using a grinding wheel; after coloring inspection confirms the absence of cracks, TIG welding is performed. Once again, inspection is carried out to ensure no cracks remain, followed by patch welding and grinding, before another coloring inspection is done.