OPERATION
19
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
§4.4.3 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.
Welding current range/A
DC positive connection
Gas nozzle diameter/mm
Gas flow rate/L
·
min
-1
10
～
100
4
～
9.5
4
～
5
101
～
150
4
～
9.5
4
～
7
151
～
200
6
～
13
6
～
8
Tungsten electrode shape and the welding current range (DCEP)
tungsten
electrode
diameter /mm
sharpened of the
electrode
diameter/mm
angle of cone
（
°
）
background
current/A
pulse current
1.0
0.125
12
2
～
15
2
～
25
1.0
0.25
20
5
～
30
5
～
60
1.6
0.5
25
8
～
50
8
～
100
1.6
0.8
30
10
～
70
10
～
140
2.4
0.8
35
12
～
90
12
～
180
2.4
1.1
45
15
～
150
15
～
250
3.2
1.1
60
20
～
200
20
～
300
Notice: the above parameters originate from
《
Welding Dictionary
》
P149, Volume 1 of Edition 2.
