Welding News

Welder Shortage Looms

According to the American Welding Society, more than 500,000 welders are employed in the United States. This is not enough to meet the increasing demands of industry. Also, more than half of the existing welder workforce is approaching retirement. By 2010, the AWS predicts demand for skilled welders will outstrip supply by 200,000.

 

Read More in Plant Engineering

 

 

 

Skilled Trades see welder shortage

Even as the economy slumps and unemployment rises, strong demand for welders has many welder jobs going unfilled. Manufacturers are scrambling to find enough skilled welders to plug current and future holes

 

Read More in the Wall Street Journal

 

 

 

 

 

MIG Welding

Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) welding or metal active gas (MAG) welding, is a welding process in which an electric arc forms between a consumable wire electrode and the workpiece metal(s), which heats the workpiece metal(s), causing them to melt, and join. Along with the wire electrode, a shielding gas feeds through the welding gun, which shields the process from contaminants in the air. The process can be semi-automatic or automatic. A constant voltage, direct current power source is most commonly used with GMAW, but constant current systems, as well as alternating current, can be used. There are four primary methods of metal transfer in GMAW, called globular, short-circuiting, spray, and pulsed-spray, each of which has distinct properties and corresponding advantages and limitations.

Originally developed for welding aluminum and other non-ferrous materials in the 1940s, GMAW was soon applied to steels because it provided faster welding time compared to other welding processes. The cost of inert gas limited its use in steels until several years later, when the use of semi-inert gases such as carbon dioxide became common. Further developments during the 1950s and 1960s gave the process more versatility and as a result, it became a highly used industrial process. Today, GMAW is the most common industrial welding process, preferred for its versatility, speed and the relative ease of adapting the process to robotic automation. Unlike welding processes that do not employ a shielding gas, such as shielded metal arc welding, it is rarely used outdoors or in other areas of air volatility. A related process, flux cored arc welding, often does not use a shielding gas, but instead employs an electrode wire that is hollow and filled with flux.