co2 welding, Mechanical Engineering

CO2 Welding

CO2 Welding is a variation of GMAW. Here the inert gas is replaced by gas mixtures or carbon dioxide, which are chemically active. The carbon dioxide decomposes in the welding arc heat and oxygen is produced. To remove this, de-oxidants are employed in the welding wire. This produces a glassy layer of slag over the weld metal, which can melt off in the subsequent passes, or it can be brushed and removed. Argon +1 to 2 % O2 is used as shielding gas for alloy steels and stainless steels. Argon +3 to 5 % O2 is used as shielding gas for carbon steels and low alloy steels. CO2 alone is enough for carbon steels. CO2 Welding is replacing shielded metal arc welding in the fabrication of structural, pipes, automobile products storage tanks and machinery, etc.

Posted Date: 9/13/2012 5:15:26 AM | Location : United States







Related Discussions:- co2 welding, Assignment Help, Ask Question on co2 welding, Get Answer, Expert's Help, co2 welding Discussions

Write discussion on co2 welding
Your posts are moderated
Related Questions
Q. What is electrode coatings? • Slag Forming Ingredients. Asbestos, mica, silica, fluorspar, titanium dioxide, iron oxide, magnesium carbonate, calcium carbonate and aluminum

in the spiral or helical gears- have meshing gear different helix angle?

(a) Illustrate Torsionally Equivalent shaft. (b) Determine the natural frequencies and mode shapes for the system shown in figure I 1 = 10 Kg -m 2 I 2 = 40 Kg -m 2

assumptions made in deriving a bending formula

Hi there. I am stuck on a problem. I am working out the section of 2 beams for the floor of an elevator. Thus far the critical conditions are made up of a beam that is 1.8m long

What do you mean by Management Information System (MIS)? What are its advantages ? Also give the qualities of an ideal MIS. What is the basic need of alternate conceptual system


temparature stresses in composite bars

In Naphtha Hydrotreating Unit, does feed/effluent heat exchangers require passivation to avoid polythionic acid stress corrosion cracking.

Windmills were traditionally used for processing grains, later they started to be used for electricity production as well. Windmills can also be used to pump water.