7.ARGON TUNGSTEN DC ARC WELDING PROCESS (only for reference)
7.1 Current carrying capacity of tungsten electrode(A)
7.2 Relation between end form of tungsten electrode and arc stability
7.3 hand argon tungsten electrode welding specification for stainless steel
8.PULSE ARGON TUNGSTEN WELDING PROCESS(only for reference)
(1) Features and application scope of the process
The pulse type argon tungsten arc welding is different from the continuous(DC) argon arc
welding. The welding current is pulsed. The wave form of the current is shown in the following
sketch.
power
polarity
thickness
of sheet
(mm)
curling butt
connection
butt connection and
filling welding wire
dia. of
welding
wire
(mm)
welding
current(A)
Argon flow
(L/min)
welding
current
argon flow
(L/min)
DC
positive
connec-
tion
0.5
10 - 30
4
15 - 35
4
1.0
0.8
15 - 40
4
35 - 40
4
1.0
1.0
35 - 60
4
40 - 70
4
1.6
1.5
45 - 80
4 - 5
50 - 85
4 - 5
1.6
2.0
75 -120
5 - 6
80 -130
5 - 6
2.0
3.0
110-140
6 - 7
120-150
6 - 7
2.0
form
variety
current
application range
electrical arc
cerium or thorium
tungsten electrode
DC
positive
narrow gap welding and
sheet welding
stable
tungsten cerium or
thorium electrode
DC
positive
dia. <1mm tungsten elec-
trode continuous welding
good
dia. of
tungsten
electroder
(mm)
DC positive connecting
DC negative
connecting
pure
tungsten
thorium
tungsten
cerium
tungsten
pure
tungsten
1.0
20 - 60
15 - 80
20 - 80
1.6
40 - 100
70 - 150
50 - 160
10 - 30
2.0
60 - 150
100 - 200
100 - 200
10 - 30