Nippon Gases 2719135, Руководство по эксплуатации и технике безопасности

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MICROTIG DC 162 / 202 PULSE
ES
PT
3. TIG WELDING (Tungsten Inert Gas)
It is an electric arc welding process under gaseous protection, using a torch with an infusible tungsten
electrode and can be performed with or without filler metal, in an inert gas atmosphere such as argon
and its mixtures.
The melting temperature of the tungsten electrode is 3400ºC higher than the metals to be welded so it
does not melt or release contaminating welding atoms.
Through this process you can weld with a very stable electric arc without spatter and slag which
guarantees a high mechanical strength of the welded joints.
TIG welding replaces oxyacetylene welding with advantages especially in the welding of mild steels and
stainless steel in direct current (DC) or aluminium and its alloys in alternating current (AC).
In specific cases, it can also be advantageous in connection with mainly MMA welding (fusible
electrode) or MIG welding that does not require the addition of metal or thin sheets in which the wires
are not visible.
Composición química de los electrodos
Código Composición Tipo Color Soldadura
WP Tungsteno puro W Verde AC – Aluminio, Magnesio
WT4 0,35-0,55% torio
Th
Azul
DC
Acero carbono, Acero inox,
Titanio
Cobre
WT10 0,80-1,20% torio Amarillo
WT20 1,7-2,3% torio Rojo
WT30 2,7-3,3% torio Violeta
WT40 3,8-4,3% torio Naranja
WZ3 0,15-0,50% zirconio
Zr
Marrón Acero inox, Níquel,
Metales no ferrosos
WZ8 0,70-0,10% zirconio Blanco
WL10 1,0-1,2% lantano La Negro Todas aplicaciones TIG
WC20 1,9-2,3% cerio Ce Gris Todas aplicaciones TIG
Tabla de diámetros y corrientes aplicables a los electrodos
∅
eléctrodo
(mm)
Amp. DC
Amp. AC
Negativo (-) Positivo (+)
1,6 mm 40-130 A 10-20 A 45-90 A
2,0 mm 75-180 A 15-25 A 65-125 A
2,5 mm 130-230 A 17-30 A 80-140 A
3,2 mm 160-310 A 20-35 A 150-190 A
4,0 mm 275-450 A 35-50 A 180-260 A
5,0 mm 400-625 A 50-70 A 240-350 A