Welder Staff

· Welding Procedures and Techniques (Chinese welder)

Our engineers specialize in solving welding engineering problems, weld failure analysis, eliminating weld defects, soldering, brazing, expert witness services, and developing welding procedures.   We provide procedure and techniques to solve your arc, MIG, TIG, laser, electron beam, resistance, or plasma welding procedures. 
Our Principal Engineer has experience in Aluminum, Steel, Stainless Steel, Nickel alloys, and various types of metals and welding procedures including aircraft, industrial machinery, ships, and under sea pipelines.   We can solve your soldering, brazing, and welding problems.

· GTAW Welding (Chinese welder)

Gas Tungsten Arc Welding (GTAW) is frequently referred to as TIG welding.   TIG welding is a commonly used high quality welding process.   TIG welding has become a popular choice of welding processes when high quality, precision welding is required. 
In TIG welding an arc is formed between a nonconsumable tungsten electrode and the metal being welded. Gas is fed through the torch to shield the electrode and molten weld pool.   If filler wire is used, it is added to the weld pool separately.

· TIG Welding Benefits (Chinese welder)

Superior quality welds
Welds can be made with or without filler metal
Precise control of welding variables (heat)
Free of spatter
Low distortion

· Shielding Gases (Chinese welder)

Argon
Argon + Hydrogen
Argon/Helium
Helium is generally added to increase heat input (increase welding speed or weld penetration).   Hydrogen will result in cleaner looking welds and also increase heat input, however, Hydrogen may promote porosity or hydrogen cracking.

· GTAW Welding Limitations (Chinese welder)

Requires greater welder dexterity than MIG or stick welding
Lower deposition rates
More costly for welding thick sections

· MIG Welding (Chinese welder)

Gas Metal Arc Welding (GMAW) is frequently referred to as MIG welding.   MIG welding is a commonly used high deposition rate welding process.   Wire is continuously fed from a spool.   MIG welding is therefore referred to as a semiautomatic welding process.

· MIG Welding Benefits (Chinese welder)

All position capability
Higher deposition rates than SMAW
Less operator skill required
Long welds can be made without starts and stops
Minimal post weld cleaning is required

· MIG Welding Shielding Gas

The shielding gas, forms the arc plasma, stabilizes the arc on the metal being welded, shields the arc and molten weld pool, and allows smooth transfer of metal from the weld wire to the molten weld pool.   There are three primary metal transfer modes:
Spray transfer
Globular transfer
Short circuiting transfer
The primary shielding gasses used are:
Argon
Argon - 1 to 5% Oxygen
Argon - 3 to 25% CO2
Argon/Helium
CO2 is also used in its pure form in some MIG welding processes.   However, in some applications the presence of CO2 in the shielding gas may adversely affect the mechanical properties of the weld.