Table of Contents
What is the reason of arc wandering in TIG welding?
Too high a current density results in excessive melting of the end of the electrode. contaminated end and regrind the end of the electrode. magnetic material such as bronze, copper or stainless steel.
What is ARC wandering?
Magnetic arc blow, also known as arc wander is the arc deflection caused by distortion of the magnetic field produced by an electric arc current. When welding ferromagnetic steels, lack of fusion imperfections can be caused through uncontrolled deflection of the arc, usually termed arc blow.
What does a welding puddle look like?
To acquire the puddle in MIG, you should lean into your weld, and slow down your weld. Look behind the point where the MIG wire is breaking off. Slag will appear similar, but the slag will swirl around the back of the weld and will have darker streaks that run through it.
What is puddle weld?
An arc spot weld also referred to as a puddle weld, or a plug weld, is the method used for welding steel decking to the supporting steel framing below. It penetrates into the steel beams, steel trusses, or open web joists beneath it and attaches the the metal deck.
What should Argon be set at for TIG welding?
Set the proper gas flow rate, which should generally be 15 to 20 cubic feet per hour (cfh) for most applications. Welders commonly — and incorrectly — assume that a higher gas flow/pressure provides greater protection.
What is the easiest position to weld?
Flat position
Flat position Also referred to as a “downhand” position, the flat position weld is the easiest and often the first weld that new students learn. The metals to be joined are placed flat, and the welder passes the electric arc over them, moving across the workpiece in a horizontal direction.
How do you prevent pinholes when TIG welding?
The best way to prevent pinholes when TIG welding is to avoid some of the common causes of them, such as: Any of these problems are easy to solve if you know what to look for. The high temperatures in TIG welding can cause the weld to oxidize in air.
How to fix TIG welding arc wandering problems?
Most TIG welding arc wandering problems can be solved by properly grind the tungsten tip. Always grind lengthwise to allow for a straight flow of electrons. Other common reasons are strong magnetism close to the torch or if the ground clamp is too far away from the weld. Below are some tips and insights into solving the problem for good.
How do you use a TIG welding electrode?
For most TIG welding, that is 1/16 of an inch….about the thickness of a dime. Keep the electrode close to the bead for a clean weld. If you move too quickly, gaps and pinholes can appear in the bead. Keep a steady rhythm of moving the electrode, pushing the rod into the puddle, and pulling the rod back.
What happens if you put too much EP in TIG welding?
However, note that too much EP causes the tungsten to ball excessively (Figure 2D) and provides too much etching. Lastly, when TIG welding aluminum, do not start welding until the puddle has the appearance of a shiny dot. This indicates that the oxide has been removed and it is safe to add filler and move forward.