Comments on: Safety Measures While Using Welding Equipments

By: Freedom4u2talk

Freedom4u2talk — Tue, 15 Jan 2008 04:46:28 +0000

porosity in the finished weld, which means that air bubbles get trapped inside the weld bead!It also means the metal has more carbon, or the cup size is wrong, the argon mixture or co2 is wrong, rust in the joint, or did you forget to clean the filler wire,(well it dose happen)preheat joint,( it will pull moisture out) The purpose of shielding gas is to keep the air atmosphere away from the weld pool. Without it, the weld pool reacts with the oxygen, nitrogen and hydrogen is that better

By: kawlover

kawlover — Tue, 15 Jan 2008 03:54:04 +0000

You will weld in accordance to the weld procedures that will be given to you for the specific materials mentioned.

By: 9057979

9057979 — Tue, 15 Jan 2008 02:36:14 +0000

This guy is good, not typical of expert village.

By: El S

El S — Mon, 14 Jan 2008 13:36:01 +0000

What you have to your advantage is being able to Oxygen- Acetylene weld. You need to be able to use both hands. One to manipulate the TIG Torch and the other hand to feed and dip the filler wire. Good Luck !

By: krazyraver69

krazyraver69 — Mon, 14 Jan 2008 10:24:04 +0000

expert village is by far the worse thing ever

By: AustinSTEEL

AustinSTEEL — Mon, 14 Jan 2008 09:09:54 +0000

he has a canadian sounding accent

By: Freedom4u2talk

Freedom4u2talk — Mon, 14 Jan 2008 06:36:19 +0000

The guy is no more than a poster, he make money on his videos, like a Jack of all trades and master of none, Sorry dude! I am a retired Steamfitter, and control tech, UA, (union) I have the nuclear, oil, paper and food industries behind me, I have taught classes on , smaw, tig, mig, s/s 304-to 316ls, dissimilar metals, w/ k and J rings, pulsearc© and the bore scope process, and different type xrays you do a very poor job of explaining the processes of welding and techniques,

By: Freedom

Freedom — Sun, 13 Jan 2008 22:45:02 +0000

When you talk about pulse tig it is mostly DC welding. You use the pulse to help reduce the distortion. It is mostly used on all ferrous metals. You do not need or have the pulse feature on AC for aluminum. You would need an AC or AC/DC machine for tig welding aluminum. They are some what costly. When tig welding you need to stay with the better name brand welders. Thermal arc, Hobart, Miller, and Lincoln are all good machines. To weld 1/4" aluminum you need approximately 200 or more amps. So this puts you into a machine that is in the $2000 range. Then you need a bottle of argon gas. If welding for any length of time at those amps you would need a water cooled torch. Not to mention the water cooler, foot pedal and all the other items needed. All these items are costly. I am not trying to discourage you but you need to know it is going to cost you some bucks to invest in all the equipment you will need. Good luck!
(30 years as a certified welder)

By: Smashley

Smashley — Sun, 13 Jan 2008 20:08:24 +0000

There is a big difference between MIG and TIG welding, in both the process, and the skill level required of the weldor. They really are two different processes altogether, and the MIG is the much easier of the two.

There is much to read on the web, including some great information at the Miller and Lincoln websites. They can give you a pretty great overview of TIG welding. But, as with many skills, it takes hands-on practice as well as study, to be successful.

If your fiance has ever welded with a gas torch, he might already have the skills he needs. Unlike a MIG welder, a TIG does not feed an electrified filler wire for you. You are in control of a separate heat source (the torch) that you must manipulate in order to melt the base metal together, while adding the filler by hand to the molten puddle you're creating. It's the same way a gas torch works, just with electricity, rather than gas, as the heat source.

The tricky part comes in learning how hot to make the puddle, how much heat to apply (with a foot or hand controller), and how to coordinate the filler at the same time. Quite often, TIG welding involves metals like aluminum or stainless, which have their own quirks that need to be considered. It's by no means impossible to learn all of this…and it can be a very valuable skill to have, often paying higher than MIG welding jobs.

If your fiance shows this prospective employer that he is a professional who takes pride in his work, has studied the subject, and is willing to learn, he may get his foot in the door and start down a new path on his welding career. I wish him the best. Study all you can, and if you know a buddy who is good with the Oxy-Acetylene torch, go visit him right away for some practice!

Best of Luck!

By: arash s

arash s — Sun, 13 Jan 2008 14:00:23 +0000

Gas tungsten arc welding (GTAW), also known as tungsten inert gas (TIG) welding, is an arc welding process that uses a nonconsumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by a shielding gas (usually an inert gas such as argon), and a filler metal is normally used, though some welds, known as autogenous welds, do not require it. A constant-current welding power supply produces energy which is conducted across the arc through a column of highly ionized gas and metal vapors known as a plasma.

GTAW is most commonly used to weld thin sections of stainless steel and light metals such as aluminum, magnesium, and copper alloys. The process grants the operator greater control over the weld than competing procedures such as shielded metal arc welding and gas metal arc welding, allowing for stronger, higher quality welds. However, GTAW is comparatively more complex and difficult to master, and furthermore, it is significantly slower than most other welding techniques. A related process, plasma arc welding, uses a slightly different welding torch to create a more focused welding arc and as a result is often automated.