During hard facing of SG Cast Iron with steelite using TIG Welding process, We faced problem of porosity after grinding the deposited metal to required height(say 2 mm).

The details of process parameters are hereunder:

Dia of rod : 3.2 mm
Current : 130 - 150 Amps
Travel speed: 250 mm/min
Wire feed rate: 300 mm/min

Plz tell what is the angle between welding torch and horizontal plane
what is the angle between wire feeder unit and horizontal plane.

Plz comment on this.

kuppusamy