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buy Tig Welder - lili036 - 04-04-2019

Model Number: WSM-160/180/200
Technical Specifications of Pluse TIG Welding Machine
Aluminium and magnesium
Aluminium and magnesium are most often welded using alternating current, but the use of direct current is also possible, depending on the properties desired. Before welding, the work area should be cleaned and may be preheated to 175 to 200 °C (347 to 392 °F) for aluminium or to a maximum of 150 °C (302 °F) for thick magnesium workpieces to improve penetration and increase travel speed.AC current can provide a self-cleaning effect, removing the thin, refractory aluminium oxide (sapphire) layer that forms on aluminium metal within minutes of exposure to air. This oxide layer must be removed for welding to occur.When alternating current is used, pure tungsten electrodes or zirconiated tungsten electrodes are preferred over thoriated electrodes, as the latter are more likely to "spit" electrode particles across the welding arc into the weld. Blunt electrode tips are preferred, and pure argon shielding gas should be employed for thin workpieces. Introducing helium allows for greater penetration in thicker workpieces, but can make arc starting difficult.
Direct current of either polarity, positive or negative, can be used to weld aluminium and magnesium as well. Direct current with a negatively charged electrode (DCEN) allows for high penetration.Argon is commonly used as a shielding gas for DCEN welding of aluminium. Shielding gases with high helium contents are often used for higher penetration in thicker materials. Thoriated electrodes are suitable for use in DCEN welding of aluminium. Direct current with a positively charged electrode (DCEP) is used primarily for shallow welds, especially those with a joint thickness of less than 1.6 mm (0.063 in). A thoriated tungsten electrode is commonly used, along with a pure argon shielding gas.
Quick Details of Pluse TIG Welding Machine
Pulse Frequency: 50/60HZ
Pilot Arc Current: 10A
Rated Duty Cycle: 60%
Dimensions: 500*260*330mm
Usage: welding
Voltage: 220V
After-sales Service Provided: Overseas third-party support available
Name: Tig dc
Insulation class: F
Weight: 10Kg/10.3Kg
Packaging & Delivery
Packaging Details
color carton(MOQ:500pcs)
Delivery Time
Shipped in 30 days after payment buy Tig Welder