2020-02-12 12:24:19


Four common operation methods for argon arc welding stainless steel pipe bottom welding!

1. What is CO2 welding?

MIG welding using CO2 with purity> 99.98% as shielding gas is called CO2 welding.

2. What is MAG welding?

MIG welding with mixed gas 75-95% Ar + 25-5% CO2, (standard ratio: 80% Ar + 20% CO2) as shielding gas—called MAG welding.

3. What is MIG welding?

1) Use high-purity argon Ar≥99.99% as shielding gas to weld aluminum and aluminum alloys, copper and copper alloys and other non-ferrous metals.

2) MIG welding of solid stainless steel wire with 98% Ar + 2% O2 or 95% Ar + 5% CO2 as shielding gas is called MIG welding.

3) MIG welding with helium + argon inert mixed gas as protection.

4. What is TIG (tungsten argon arc welding) welding?

Inert gas shielded arc welding using pure tungsten or activated tungsten (thorium tungsten, cerium tungsten, zirconium tungsten, lanthanum tungsten) as the infusible electrode, referred to as TIG welding.

5. What is SMAW (electrode arc welding) welding?

An arc welding method in which welding is carried out by manually manipulating the electrode.

6. What is carbon arc gouging?

A surface processing method that uses a carbon rod as an electrode to generate an electric arc between the workpiece and use compressed air (pressure 0.5-0.7Mpa) to blow off the molten metal. It is often used for root removal of welds, beveling, repairing defects, etc.

7. Why is CO2 welding more efficient than electrode arc welding?

1) CO2 welding is 1-3 times higher than the melting speed and melting coefficient of electrode arc welding.

2) The groove section is reduced by 50% compared to the welding rod, and the amount of deposited metal is reduced by 1/2.

3) The auxiliary time is 50% of the electrode arc welding.

Three items in total: The ergonomics of CO2 welding is increased by 2.02--3.88 times compared with electrode arc welding.

8. Why CO2 welding joints

Is the welding joint quality better than electrode arc welding?

CO2 welding seam heat affected zone is small, welding deformation is small;

The CO2 welding seam contains low hydrogen content (≤1.6ML/100g), and the tendency of pores and cracks is small;

The CO2 weld is well formed, with fewer surface and internal defects, and the inspection pass rate is higher than that of electrode arc welding.

9. Why CO2 welding

Is the overall cost lower than electrode arc welding?

1) The cross-sectional area of the groove is reduced by 36-54%, which saves the amount of filler metal.

2) Reduce power consumption by 65.4%.

3) Compared with electrode arc welding, the equipment shift fee is reduced by 67-80%, and the cost is reduced by 20-40%.

4) Reduce labor costs and working hours, and reduce costs by 10-16%.

5) Save auxiliary man-hours, auxiliary material consumption and deformation correction costs.

Combining the five items, CO2 welding can reduce the total welding cost by 39.6-78.7%, an average reduction of 59%.

10. What is low frequency pulse?

Which welding is applicable?

A pulse arc with a pulse frequency of 0.5-30Hz is called low-frequency pulse welding. Mainly used for TIG welding of non-ferrous metals such as stainless steel, steel and titanium.

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