1. What is welding material?
Welding materials include electrodes, welding wires, fluxes, gases, electrodes, gaskets, etc.
2. What is welding wire?
When welding, it is used as a filler metal, and at the same time it is used to conduct conductive wire-called welding wire. Divided solid wire and flux cored wire two. Commonly used solid wire model: ER50-6 (brand: H08Mn2SiA).
3. Why is the impact toughness of MAG welded joints higher than that of CO2 welded joints?
When MAG welding, the reactive gas is only 20%, the transition coefficient of the alloy elements in the welding wire is high, and the impact toughness of the weld is high. CO2 welding reactive gas is 100%. The combined deoxidation of manganese and silicon alloy elements in the welding wire has a slightly lower transition coefficient of the alloy elements, and the impact toughness of the weld is not as high as that of the MAG welding. Such as Tangshan Kobelco MG-51T wire (equivalent to ER50-6) at room temperature impact toughness values: MAG: 160J; CO2: 110J.
4. Why is CO2 welding more efficient than arc welding?
<1> CO2 welding is 1-3 times higher than the arc melting rate and melting coefficient of the electrode arc welding;
<2> The groove section is reduced by 50% compared with the welding rod, and the amount of deposited metal is reduced by 1/2;
<3> Auxiliary time is 50% of electrode arc welding.
Total of three items: The efficiency of CO2 welding increases by 2.02 to 3.88 times compared to electrode welding.
5. Why do CO2 welded joints have better welding joints than electrode welding?
The heat affected zone of CO2 weld is small, welding deformation is small; CO2 weld has low hydrogen content (≤1.6ML/100g), and the porosity and crack tends to be small; CO2 weld is well formed with less surface and internal defects. Higher than electrode arc welding.
6.Why is the overall cost of CO2 welding less than that of electrode welding?
<1> The cross-sectional area of the groove is reduced by 36-54%, saving the amount of filler metal;
<2>Reducing electricity consumption by 65.4%;
<3> The equipment shift cost is reduced by 67-80% compared with electrode welding and the cost is reduced by 20-40%;
<4>Reducing labor costs, working hours, and reducing costs by 10-16%;
<5> Save on auxiliary working hours, auxiliary materials consumption and correction of deformation costs;
In combination of five items, CO2 welding can reduce the total cost of welding by 39.6-78.7% with an average reduction of 59%.
