Focusing on High-Purity Gases for Indianapolis Laser Welding


Lasers were advanced first by – wouldn't you guess it – Albert Einstein in the early days of the 20th century. It wasn’t until the 1980s, though, that lasers were employed to solder lead in electronic component circuit boards. And it wasn’t until 2002 that CO2 lasers were employed to weld polymers. Today, American Welding & Gas, Inc., one of more than 150 PurityPlus® Partners at 600 locations across the country, is honored to be a trusted Indianapolis producer of the high-purity specialty gases so indispensable to the gas laser welding process. Our key customers are considerably automated high-volume manufacturers. Those engaged in the automotive industry are possibly the most conspicuous examples of such.

A few gas laser basics:

  • Resonator gases are commonly a mixture of helium (He), carbon dioxide (CO2), and nitrogen (N2). The active gas that as a matter of fact generates the laser light itself – infrared radiation – is CO2.
  • Shielding gases safeguard the weld area from oxygen and water vapor, which helps jack up the speed and quality of the welding process. Argon is the more traditional shielding gas. It’s often mixed with helium, oxygen, or carbon dioxide, which markedly raises its plasma suppression properties.
  • As a resonator gas, ultra-high-purity (99.999%) PurityPlus® helium provides exceptionally high thermal conductivity, the better to conduct heat away from the electric discharge. This makes it a great choice for very high-powered laser welding.
  • PurityPlus® carbon dioxide, while often used by itself to control CO2 lasers, is better intermixed with helium and nitrogen so as to realize the very high laser powers necessary for laser cutting and welding.
  • PurityPlus® nitrogen, especially as an intermediary with CO2, is also helpful in obtaining very high laser powers.
  • PurityPlus® argon, an inert gas and thus superb as a shielding gas in laser welding, provides full protection against ambient air. Since it normally aids in plasma generation, it should not be used for laser powers above 3 kW.

Regardless of your specific laser welding application here in Indianapolis, you can rest assured we supply the PurityPlus® specialty gases with the certified high- or ultra-high purity needed to accomplish it. Contact American Welding & Gas, Inc. today.