STEALTH DIGI-TIG 320 AC/DC PULSE
22
4.6.2 Explanation of welding quality
4.6.3 Parameters Matching
Welding area
colour
Welding area
colour
Protection
effect
Protection
effect
Silver
Gold
Bright
Silver
Blue
Orange/
Yellow
The relationship of welding area colour and protection effect of stainless steel
The relationship of welding area colour and protection effect of Ti-alloy
Better
Better
Best
Best
Red/Grey
Blue/
Purple
Good
Good
Grey
Blue/
Grey
Bad
Bad
Black
White
Powder
Worst
Worst
MAINTENANCE AND TROUBLESHOOTING
23
§4.6 Welding Parameters
§4.6.1 Joint forms in TIG/MMA
§4.6.2 The explanation of welding quality
The relation of welding area color & protect effect of stainless steel
Welding area
color
argent , golden
blue
red-grey
grey
black
Protect effect
best
better
good
bad
worst
The relation of welding area color & protect effect of Ti-alloy
Welding area
color
bright argent
orange-yellow blue-purple caesious
white powder of
titanium oxid
Protect effect
best
better
good
bad
worst
§4.6.3 TIG Parameters Matching
The corresponding relationship between gas nozzle diameter and electrode diameter
Gas nozzle diameter/mm
Electrode diameter/mm
6.4
0.5
8
1.0
9.5
1.6 or 2.4
11.1
3.2
Notice: the above parameters originate from
《
Welding Dictionary
》
P142, Volume 1 of
Edition 2.
a
butt joint
b
lap joint
c
coner joint
d T
joint
The corresponding relationship between gas nozzle diameter and electrode diameter
Gas nozzle and the shield gas flow rate
MAINTENANCE AND TROUBLESHOOTING
24
Gas nozzle and the shield gas flow rate
Welding current
range/A
DC positive connection
AC
Gas nozzle
diameter/mm
Gas flow
rate/L
·
min
-1
Gas nozzle
diameter/mm
Gas flow
rate/L
·
min
-1
10
~
100
4
~
9.5
4
~
5
8
~
9.5
6
~
8
101
~
150
4
~
9.5
4
~
7
9.5
~
11
7
~
10
151
~
200
6
~
13
6
~
8
11
~
13
7
~
10
201
~
300
8
~
13
8
~
9
13
~
16
8
~
15
Notice: the above parameters originate from
《
Welding Dictionary
》
P149, Volume 1 of Edition 2.
tungsten electrode
diameter /mm
sharpened of the
electrode diameter/mm
angle of cone
(°)
background current/A
1.0
0.125
12
2
~
15
1.0
0.25
20
5
~
30
1.6
0.5
25
8
~
50
1.6
0.8
30
10
~
70
2.4
0.8
35
12
~
90
2.4
1.1
45
15
~
150
3.2
1.1
60
20
~
200
TIG of stainless steel (single run welding)
Workpiece
thickness
/mm
Joint form
tungsten
electrode
diameter/mm
welding wire
diameter/mm
Argon gas
flow rate/
L
·
min
-1
welding
current
(DCEP)
Welding
speed/
cm
·
min
-1
0.8
Butt joint
1.0
1.6
5
20
~
50
66
1.0
Butt joint
1.6
1.6
5
50
~
80
56
1.5
Butt joint
1.6
1.6
7
65
~
105
30
1.5
Corner
joint
1.6
1.6
7
75
~
125
25
2.4
Butt joint
1.6
2.4
7
85
~
125
30
2.4
Corner
joint
1.6
2.4
7
95
~
135
25
3.2
Butt joint
1.6
2.4
7
100
~
135
30
3.2
Corner
joint
1.6
2.4
7
115
~
145
25
4.8
Butt joint
2.4
3.2
8
150
~
225
25
4.8
Corner
joint
3.2
3.2
9
175
~
250
20
Notice: the above parameters originate from
《
Welding Dictionary
》
P150, Volume 1 of Edition 2.