How do you do a carbon arc gouge?

Asked by: Dan Halling

Gouging is commenced by striking the electrode tip on to the workpiece surface to initiate the arc. Unlike manual metal arc (MMA) welding the electrode tip is not withdrawn to establish arc length. Molten metal directly under the electrode tip (arc) is immediately blown away by the air stream.

What is needed to carbon arc gouge?

Required equipment includes an air compressor, welding power source, carbon electrode and a gouging torch.

How do I set up carbon arc gouging?

It requires an air source it requires carbon arc electrodes. And the air is shot out of some holes down here at the bottom we strike an arc with an electrode. And the air displaces.

How do you use gouging carbons?

That can be used for procedures where we're getting full penetration. We do a partial penetration weld on one side we turn it over we back gouge down to clean metal grind. Clean complete the weld.

What type of power source is needed for air carbon arc gouging?

three-phase welding power source

However, any three-phase welding power source of sufficient capacity may be used for air carbon arc gouging. The arc voltage used in air carbon arc gouging and cutting ranges from a low of 35 to a high of 56 volts; thus the open-circuit voltage should be at least 60 volts.

Can you arc gouge without air?

having to invest big bucks in an air-arc cutting equipment (or worrying about starting fires when using it out doors). ZENA NO-Gas arc cutting/gouging rods let you gouge, bevel, and cut metal without needing a 300+ Amp air-arc gouging/cutting rig or an acetylene cutting torch and bulky gas bottles.

How many amps does it take to arc gouge?

Gouging Electrodes

Can you carbon arc gouge on AC?

Application. As air carbon arc gouging does not rely on oxidation it can be applied to a wide range of metals. DC (electrode positive) is normally preferred for steel and stainless steel but AC is more effective for cast iron, copper and nickel alloys.

How many CFM do I need for arc gouging?

12-15 cfm will work but will work the compressor full time. The bigger the compressor and the more tank you have the longer it will last and more efficiently it will work. Most work can be accomplished without opening the air all the way on the torch.

What are some of the drawbacks of air carbon arc cutting?

While carbon arc gouging is an effective method in some cases, it does have some drawbacks you should be aware of, including: Comparatively lower efficiency: Arc welding typically puts out more waste product than other welding methods, which can be costly, depending on the materials used.

Can you gouge with AC welder?

The air carbon-arc gouging process does not require oxidation to maintain the cut, so it can gouge or cut metals that the oxyfuel process cannot. In fact, most common metals (carbon steel, stainless steel, high-alloy wear plate, copper alloys and cast irons) can be cut using air carbon-arc gouging.

How loud is carbon arc gouging?

Air carbon arc cutting and gouging is a welding process that exposes workers to hazardous sound levels from 108-120 dB(A). Welders who perform the gouging process and other workers in close proximity to the process are at risk for noise-induced hearing loss.

What polarity is used in carbon arc welding?

A rod of carbon is used as negative (-) pole and the ‘work’ being welded as positive (+) pole. The carbon electrode does not melt itself. It is a non-consumable electrode. A filler rod is used separately at the welding joint.

Is Earth positive or negative on a welder?

Stick electrodes are generally run with a positive polarity (DCEP). With this setup, your electrode holder (stinger) has a positive current flowing to the stick electrode (also just called a “rod”). Your ground lead will be attached to the negative terminal of your machine.

What is the temperature of a carbon arc welding?

between 5000 degrees Celsius to 9000 degrees Fahrenheit

The temperatures that are created using carbon arc welding average between 5000 degrees Celsius to 9000 degrees Fahrenheit and are known for creating an extremely bright light.

What is the temperature at the negative terminal in carbon arc welding?

3200°C.

Explanation: In carbon arc welding, the carbon is present at the negative electrode, where the electrode temperature is at 3200°C. This temperature is lesser than that at the positive electrode.

What should you never weld directly against?

Welding should never be done directly on a concrete floor. Heat from the arc can cause steam to build-up in the floor which could cause an explosion. The welder cables should be positioned so that sparks and molten metal will not fall on them.

Why carbon is used in carbon-arc welding?

Why is carbon used in carbon arc welding? Clarification: Carbon is used in carbon arc welding, at the negative terminal of the cathode. The reason for employing carbon at the negative terminal is that, a lesser amount of heat is generated at the electron tip than at the workpiece.

Which of the following carbon steel is most weldable?

Low carbon steel

Low carbon steel is typically the most readily welded steel in a room temperature environment.

Why welding of high carbon steel is difficult?

Welding High-Carbon Steels



The high-carbon steels contain carbon from 0.60% to 2.00%. This group of steel is very difficult to weld because they readily form the hard and brittle martensite phase as steel cools from welding.

How do you weld high carbon steel?

Stick welding, TIG welding, and MIG welding processes are all used in carbon steel welding. A MIG welder is the best equipment to carry out flawless carbon steel welding, though, because the wire stiffness is designed to pass through the liner from the machine with minimum friction.

What happens to high carbon steel when welded?

The main problems with welding high carbon steels are: Cracking of the weld metal – driven by the expansion and contraction during welding on a base metal (high carbon steel) that doesn’t stretch very much. Differences in expansion rates between weld metal and base metal can lead to cracking.

What is the best welding rod for high carbon steel?

Many welders use E7018 electrodes to weld thick metals such as structural steel. E7018 electrodes also produce strong welds with high impact properties (even in cold weather) and can be used on carbon steel, high-carbon, low-alloy or high-strength steel base metals.

Can you stick weld high carbon steel?

Just layer right down in there and just don't move it just let it burn. Itself lay it down more time lay it down lay down.