According to the technological characteristics of all-position automatic welding of superalloy conduit

the causes of common welding defects such as non-fusion

non-penetration and weld depression were analyzed

the corresponding welding process plan and the measures to avoid welding defects were formulated

the process test was carried out to verify and the product was welded in kind

all welds were subjected to non-destructive tests（appearance inspection

endoscopy inspection

X-ray inspection

hydraulic airtight test）and destructive test（mechanical performance test and metallographic analysis）

and the quality of welds met the corresponding standard requirements

guaranteed product quality and improved workshop production efficiency. It is an inevitable trend to replace the traditional manual argon arc welding process for all-position automatic welding of superalloy conduits.