Titanium tube welding on the back of the blue, and then fill the welding, welding qualified?
Unqualified depends on the specific detection method, in fact, weld defects are already there.
Argon welding is only the original oxide layer covered, the weld has been blue oxide layer will be brittle, is the weld plasticity reduction
Welding on the back of the blue, indicating that the lack of negative gas protection, has been the occurrence of oxidation, the occurrence of such a situation should be immediately surface treatment.
