Largeblunt edge root welding method for A-TIG of 20 steel pipe
A study was conducted on the large blunt edge root welding of 20 steel pipes using manual A-TIG welding.When the size of the blunt edge and the assembly gap are reasonable,with the support of appropriate process pa-rameters,A-TIG welding with full position large blunt edge root can be achieved.The change in surface tension di-rection of the molten pool under the action of an activator is an important factor affecting the formation of A-TIG full position large blunt edge root welding.In the flat welding position,the inner surface tension σ2 is the important force that balances the downward gravity G and the arc force Fa;At the vertical welding position,the inner surface tension σ2 is the main force that balances the horizontal arc force Fa;At the overhead welding position,the outer surface tension σ1.Internal surface tension σ2 is an important force to overcome gravity G.
A-TIG weldinglarge blunt edgeroot weldingall position
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