Welding Basics 1: Basic Welding - xlweld.com
Welding Basics 1: Basic Welding
First, the basic welding
What is welding
A: Two or more materials (the same kind or heterogeneous), by heating or pressing or both, to achieve the combination between atoms and the formation of a permanent connection process is called welding.
2. What is arc?
A: The power supply from the welding, between the two poles produce a strong and lasting gas discharge phenomenon - called arc.
<1> According to the current type can be divided into: AC arc, DC arc and pulse arc.
<2> According to the state of the arc can be divided into: free arc and compression arc (such as Torch
.html target='_blank'>Plasma arc).
<3> According to the electrode material can be divided into: melting arc and non-melting arc. 3. What is the base metal? A: The welding metal --- called the base metal. The following are the same as the "
What is it?
A: The tip of the wire is heated and melted, and the liquid metal droplets that move to the bath are called droplets.
5. What is pooling?
A: welding on the weld formed by a certain shape of the liquid metal parts --- called the pool.
6. What is the weld?
A: The welded part of the weld after welding.
7. What is weld metal?
A: The part of the metal formed by the solidification of the molten base material and the filling metal (wire, electrode, etc.).
8. What is shielding gas?
A: welding for the protection of metal droplets and molten pool from the outside harmful gases (hydrogen, oxygen, nitrogen) intrusion of gas --- protective gas.
9. What is welding technology?
A: A variety of welding methods, welding materials, welding technology and Welding Equipment
, and its basic theory of the general term - called welding technology.
10. What is welding process? What is it?
A: The welding process of a set of technical procedures and technical requirements. The contents include: welding method, preparation before welding, assembly, welding materials, welding equipment, welding sequence, welding operation, welding process parameters and post-weld treatment.
11. What is CO2 welding?
A: With the purity of> 99.98% of the CO2 to do the protection of gas melting gas welding - known as CO2 welding.
12. What is MAG welding?
A: The mixed gas 75 - 95% Ar +25 - 5% CO2, (standard ratio: 80% Ar + 20% CO2) to do the protection of gas melting gas welding - known as MAG welding.
13. What is MIG welding?
A: <1> with high purity argon Ar ≥ 99.99% to do the protection of gas melting gas protection welding aluminum and aluminum alloy, copper and copper alloy and other nonferrous metals;
<2> Melt welding of solid stainless steel wire with 98% Ar + 2% O2 or 95% Ar + 5% CO2 as protective gas - known as MIG welding.
<3> Melting gas shielded with helium + argon inert gas mixture.
14. What is TIG (TIG Welding
A: With pure tungsten or activated tungsten (thorium tungsten, cerium tungsten, zirconium tungsten, lanthanum tungsten) as a non-melting electrode of inert gas protection arc welding, referred to as TIG welding.
15. What is SMAW (electrode arc welding) welding?
A: Arc welding method for welding with electrodes by hand.
16. What is carbon arc gouging?
A: The use of carbon rods as the electrode, with the workpiece between the arc, with compressed air (pressure 0.5-0.7Mpa) will melt the metal blowing a surface processing method. Commonly used to weld clear roots, planing groove, repair defects and so on.