Mechanical Engineering - Workshop Technology - Discussion
Discussion Forum : Workshop Technology - Section 4 (Q.No. 47)
47.
In welding aluminium with TIG arc welding, alternating current is used.
Discussion:
8 comments Page 1 of 1.
Tushar said:
10 years ago
Either DC reverse polarity or AC current can be used.
JJJ said:
8 years ago
Welding cu - direct current with the straight polarity.
Welding mg - direct current with the reverse polarity.
Welding al - AC current.
All belongs to TIG.
Welding mg - direct current with the reverse polarity.
Welding al - AC current.
All belongs to TIG.
Sai kiran said:
8 years ago
Nice explanation @Jjj.
Arp said:
7 years ago
Tig nowadays also called as GTAW gas tungsten arc welding.
Sagar said:
6 years ago
Because Aluminum is a non ferrous metal, DC current with reverse polarity is used!
(1)
Chakri said:
5 years ago
What is the difference of straight and reverse polarities?
Sagar said:
5 years ago
@Chakri.
When your workpiece has given a positive terminal, it is straight polarity. When negative terminal is given to it then it is reverse polarity.
When your workpiece has given a positive terminal, it is straight polarity. When negative terminal is given to it then it is reverse polarity.
NBharti said:
2 years ago
Direct Current Straight Polarity is used for= Stainless steel, Copper and its alloy.
Direct Current Reverse Polarity for = Magnesium,
High Frequency Alternating Current for = Aluminum, Steel etc.
Direct Current Reverse Polarity for = Magnesium,
High Frequency Alternating Current for = Aluminum, Steel etc.
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