The TIG (Tungsten Inert Gas) welding machine will work without the gas turned on (argon), but your weld will be contaminated due to exposure to the air and will likely crack, or have other defects in it (bubbles, etc).
First a tig torch and pure argon gas as well as a argon regulator
The only way to tig is to have your ground clamp hooked to the positive side of the welding machine. The negative lead will go to the tig torch. If it is reversed you will find out very quickly when you strike an arc. Most metals will be welded using this Polarity (straight). Most Aluminum TIG welding is performed using A C current.
Silicon is added to the tig rods in production. Use a gas weld rod which does not have the silicon and the weld will be full of porosity.
Welding gas can refer to two things. In torch welding, it is either a fuel gas such as acetylene or MAPP or oxygen, and in arc welding (MIG, TIG, etc...) it refers to any of the inert gases such as carbon dioxide or argon that is pumped over the weld pool to protect it from atmospheric contaminants.
Tig, or tungsten inert gas welding used to be known as Heliarc welding when it was first developed in 1941, because helium was then used as the inert gas. As the process has developed and progressed the name was changed to Tungsten Inert Gas welding. Argon or a combination including argon is now more widely used as the inert gas for this process.
First a tig torch and pure argon gas as well as a argon regulator
That greatly depends on the type of steel you are welding, but you should be safe with a CO2 Argon mix, otherwise known as Steel mix, it is good for mild to medium grade steel.
TIG welding uses Argon.
oxygen and acetylene gas Argon gas is used in MIG and TIG welding
Argon gas is an inert gas and it shields the weld from any contamination from the out side air. It shields the weld and makes it cleaner and stronger.
Any D C stick welder can be adapted to TIG welding most metals (not Aluminum). Purchase a torch, regulator/flowmeter and hose, rent a cylinder of gas (preferably Argon) . Connect the TIG lead to the negative - post, your ground cable to the positive + post, set the flow at 15 - 20CFM and you're in business. You will have to scratch start to establish an arc. You will also have to guess where to set the amperage control on the machine. Practice will help with this.
I have only seen a gunsmith use a tig machine on one occasion, and that was tor the repair of a brass trigger on an antique rifle
Argon is generally not used for welding on its own because it is an inert gas and does not support combustion like acetylene. However, argon is commonly used as a shielding gas in processes like TIG and MIG welding to protect the weld pool from atmospheric contamination.
The gas is going to depend on what style of welding you are doing. For TIG (tungsten inert gas) it is 100% argon. For heliarc, which is a form of TIG, it is 100% helium. For MIG (metal inert gas) it is 75% argon/ 25% carbon dioxide. Finally, for gas welding, it acetylene and oxygen--separate tanks. (my son helped on this one)
Yes, you can weld aluminum with a DC TIG welder using pure tungsten electrodes and argon gas as a shielding gas. However, welding aluminum typically requires an AC TIG welder to produce the best results due to the material's high thermal conductivity.
TIG (tungsten inert gas) torches are torches used for arc welding to produce high-quality, clean welds on many materials including steel, aluminum and copper. With a TIG torch, Argon gas protects the weld puddle from airborne contaminants, while a tungsten electrode is used to heat the metal.
On a basic machine connect the torch to the ground (-) and the ground cable to the positive (+). TIG uses DCSP (straight polarity). Turn on the gas (argon) and set at 15. Trial and error for the amperage setting. That's it. More elaborate machines have a polarity switch. Set this to straight polarity. If it has a high frequency switch set this to START. If it has a foot control it may have a remote setting. Use that. Also set the amperage knob to MAX. Crank open the argon cylinder and set the flow meter for 15 unless you are working in a breeze then set at 25 or so.