Stel TIG μP 253H AC/DC Manual De Instrucciones página 66

TIG µP 253H AC/DC
TECHNICAL DESCRIPTION
b) Choosing and preparing the electrode
- The electrodes normally used are of cerium tungsten (2% cerium, grey in colour)
and the following diameters are recommended depending on the current:
- A tip is made on the electrode as shown in the figure.
- Angle a
welding current varies; the following table recommends the value:
c) Weld material
Angle (°)
30
60 – 90
90 –120
-
Many kinds of materials may be treated, however there are some basic rules
1 )
the rods of weld material must have the same mechanical and chemical
properties as the material to be welded
2)
it is recommended not to use parts of the base material, as they could contain
;
impurities due to the work process
3) if the material used has a different chemical composition, it is advisable to
assess the final characteristics of the joint, both mechanical and anti-corrosive.
d) Protection gas
- The protection gas normally used is pure argon with a quantity that varies
according to the current used (4-6 I/min).
- The TIG process is indicated for welding steel (both carbon steel and alloys), it
gives a weld with an excellent appearance which limits subsequent processing and
is often used for the first pass on pipes.
- Before every weld it is necessary to perform accurate preparation and cleaning of
the edges.
66
ENGLISH
COD. 6910000030
varies as the
Welding current A
5 - 30
30 - 120
120 - 160
;
STEL s.r.l. – Via del Progresso n° 59 – 36020
Loc. Castegnero (VICENZA) - ITALY
TEL. +39 444 639525 (central.) – +39 444 639682 (comm.)
FAX +39 444 639641 – E-mail:stelgroup.com
http: www.stelgroup.it
TECHNICAL DESCRIPTION
b) Choosing and preparing the electrode
- The electrodes normally used are of cerium tungsten (2% cerium, grey in colour)
and the following diameters are recommended depending on the current:
- A tip is made on the electrode as shown in the figure.
- Angle a
welding current varies; the following table recommends the value:
c) Weld material
: -
Many kinds of materials may be treated, however there are some basic rules
1 )
the rods of weld material must have the same mechanical and chemical
properties as the material to be welded
2)
it is recommended not to use parts of the base material, as they could contain
impurities due to the work process
3) if the material used has a different chemical composition, it is advisable to
assess the final characteristics of the joint, both mechanical and anti-corrosive.
d) Protection gas
- The protection gas normally used is pure argon with a quantity that varies
according to the current used (4-6 I/min).
- The TIG process is indicated for welding steel (both carbon steel and alloys), it
gives a weld with an excellent appearance which limits subsequent processing and
is often used for the first pass on pipes.
- Before every weld it is necessary to perform accurate preparation and cleaning of
the edges.
66
TIG µP 253H AC/DC
COD. 6910000030
Angle (°) Welding current A
30
60 – 90
90 –120
;
;
STEL s.r.l. – Via del Progresso n° 59 – 36020
TEL. +39 444 639525 (central.) – +39 444 639682 (comm.)
FAX +39 444 639641 – E-mail:stelgroup.com
ENGLISH
varies as the
5 - 30
30 - 120
120 - 160
:
Loc. Castegnero (VICENZA) - ITALY
http: www.stelgroup.it