- 25 -
9.
WELDING PREPARATION (continued)
ٟ
Weld joints with different heat capacity
Material Joint
geometry
No. of
Layer
Pulse condition
Travel
speed
(cm/min)
Filler wire
Pulse
Current
(A)
Base
Current
(A)
Pulse
Freq.
(Hz)
Pulse
Width
(%)
Feeding
Speed
(cm/min.)
Copper
㧗
Mild Steel
1 250 50 0.8
20 10
60
( Cu )
Stainless
Steel
㧗
Mild Steel
1 170 60 2.5
50 50
60
( SUS )
Mild Steel
1
120
50
2
50
20
30
Stainless
Steel
4 160 50 1.5
46 8.5
60
Shielding Gas : Argon (10ℓ/min.) Electrode : Thoriated Tungsten ( 2.4mm
Ǿ
)
Filler Wire : 1.2mm
Ǿ
Arc Length : 2 - 3mm
52%%
%2
52%%
575
52%%
.GPIVJOO
575
%W
575
575