Mr Tig Blog

How to Weld Titanium without Trail Cups

Dec 2014 19
16 15 Fri
Written by Mr. TIG (Wyatt Swaim)

Titanium is among the most difficult alloys to weld when it comes to gas coverage. Unlike most metals, Titanium will absorb oxygen, contaminating and weakening the heat effected zone until it reaches (at least) 800 degrees. Titanium is a very expensive metal, so when a weld goes bad, it is a costly mistake. There are many different devices used to avoid this contamination including trail cups, purge chambers and a host of homemade solutions.

In this episode we are going to bust the myth that you MUST have these devices to achieve good Titanium welds. We will be using a jumbo gas lens and purging the backside of the weld... No trail cups and no purge chambers.

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Weld Watch Welding Camera Review

Dec 2014 11
16 15 Thu
Written by Mr. TIG (Wyatt Swaim)


Welding cameras are not something that every Weekend Warrior is going to have for the garage, but they do play a large part in industry and welding education. There are a lot of welding cameras out on the market and this one is the only that we have come across that has zoom and focus, making it easy to move from application to application.

To get more information on WeldWatch cameras visit their website at: http://visiblewelding.com/

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Welding Heavy Wall Aluminum with the Everlast 325EXT

Nov 2014 20
16 15 Thu
Written by Mr. TIG (Wyatt Swaim)

In this episode we take another look at the Everlast 325EXT TIG welder. In the first episode, "How to Weld Thin Wall Stainless Steel with the Everlast 325EXT" we tested the low end of the machine on DC. In this episode, we put this machine through the ringer and see how it performs at its high end on some super heavy Aluminum bar stock.

To test the machine, we performed 3 welds:
Bead on Plate (3/8" Aluminum) - To see how the machines cleaning action worked.
3/8" Lap Joint - We did this part cold to see how the machine performed on a cold part.
1.5" Bar Stock to 3/8" Plate Fillet - We did this to really test the high end of the machines output.

3/8" Aluminum Bead on Plate:
We performed this weld cold to really test how the machine would do welding a part that had no heat treatment whatsoever. We set the machine at a maximum of 250 amps.

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Welding Project: Cast Aluminum Intake Manifold Repair

Dec 2014 05
16 15 Fri
Written by Mr. TIG (Wyatt Swaim)

Cast Aluminum, like any cast material can be very difficult to weld. It is important to follow specific procedures before attemptimg to weld a cast metal piece to insure you get a good solid weld. Many welders will preheat the entire part to a suitable temperature before they begin welding, and this is often a good idea. However, on this project, our intake manifold has two four barrel carburetors on it and we don't want to risk damaging (or igniting) them with preheating.

You will see in this video how we go about preheating without risking the integrity of the carburetors, as well as learn some other ways of preparing the cracks to be welded and what materials and techniques to use to weld the manifold.

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Welding Thin Wall Stainless Steel with the Everlast 325EXT

Nov 2014 13
16 15 Thu
Written by Mr. TIG (Wyatt Swaim)

In this video we take a look at the new Everlast 325EXT TIG welder. In part 1, of this 2 part series, we put some of this welders features to the test:

- Low End DC Welding (under 10 amps)
- Pulsing features
- Ease of Setup

Testing the low end amperage performance:
To test the machines low end amperage performance in DC mode, we decided to weld on a real world application. Rather than run some beands on plate and welding some scrap together, we thought we would show you how to weld with and without filler material on some products we make and sell in the store. In the first part of this video you will see how we weld stainless steel trail cups to be used for welding exotic materials that need increased gas coverage, like Titanium.

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