4.4 Welding Parameters
4.4.1 Joint forms in TIG/MMA
4.4.2 The Explanation of Welding Quality
The relation of welding area colour & the protection effect of stainless steel
Welding area
colour
Protect
effect
argent, golden
blue
red-grey
grey
black
best
better
good
bad
worst
The relation of welding area colour & the protection effect of Ti-alloy
Welding area
colour
Protect
effect
bright argent
orange-yellow
blue-purple
caesious
white powder of
titanium oxid
best
better
good
bad
worst
4.4.3 TIG Parameters
Gas Nozzle
diameter/mm
Electrode
diameter/mm
6.4
8
9.5
11.1
0.5
3.2
1.6 or 2.4
1.0
The corresponding relationship between gas nozzle diameter and electrode diameter
Welding current
range/A
DC Positive Connection
Gas Nozzle Diameter/mm
Gas Flow Rate/L · min
-1
10~100
101~150
151~200
201~300
4~9.5
4~9.5
6~13
8~13
4~5
4~7
6~8
8~9
11