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Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing fusion, which is distinct from lower temperature metal-joining techniques such as brazing and soldering, which do not melt the base metal. In addition to melting the base metal, a filler material is often added to the joint to form a pool of molten material (the weld pool) that cools to form a joint that can be as strong, or even stronger, than the base material. Pressure may also be used in conjunction with heat, or by itself, to produce a weld.
Although less common, there are also solid state welding processes such as friction welding or shielded active gas welding in which metal does not melt.
Some of the best known welding methods include:
Shielded metal arc welding (SMAW) – also known as "stick welding or electric welding", uses an electrode that has flux around it to protect the weld puddle. The electrode holder holds the electrode as it slowly melts away. Slag protects the weld puddle from atmospheric contamination.
Gas tungsten arc welding (GTAW) – also known as TIG (tungsten, inert gas), uses a non-consumable tungsten electrode to produce the weld. The weld area is protected from atmospheric contamination by an inert shielding gas such as argon or helium.
Gas metal arc welding (GMAW) – commonly termed MIG (metal, inert gas), uses a wire feeding gun that feeds wire at an adjustable speed and flows an argon-based shielding gas or a mix of argon and carbon dioxide (CO2) over the weld puddle to protect it from atmospheric contamination.
Flux-cored arc welding (FCAW) – almost identical to MIG welding except it uses a special tubular wire filled with flux; it can be used with or without shielding gas, depending on the filler.
Submerged arc welding (SAW) – uses an automatically fed consumable electrode and a blanket of granular fusible flux. The molten weld and the arc zone are protected from atmospheric contamination by being "submerged" under the flux blanket.
Electroslag welding (ESW) – a highly productive, single pass welding process for thicker materials between 1 inch (25 mm) and 12 inches (300 mm) in a vertical or close to vertical position.
Many different energy sources can be used for welding, including a gas flame, an electric arc, a laser, an electron beam, friction, and ultrasound. While often an industrial process, welding may be performed in many different environments, including in open air, under water, and in outer space. Welding is a hazardous undertaking and precautions are required to avoid burns, electric shock, vision damage, inhalation of poisonous gases and fumes, and exposure to intense ultraviolet radiation.
Until the end of the 19th century, the only welding process was forge welding, which blacksmiths had used for centuries to join iron and steel by heating and hammering. Arc welding and oxyfuel welding were among the first processes to develop late in the century, and electric resistance welding followed soon after. Welding technology advanced quickly during the early 20th century as the world wars drove the demand for reliable and inexpensive joining methods. Following the wars, several modern welding techniques were developed, including manual methods like SMAW, now one of the most popular welding methods, as well as semi-automatic and automatic processes such as GMAW, SAW, FCAW and ESW. Developments continued with the invention of laser beam welding, electron beam welding, magnetic pulse welding (MPW), and friction stir welding in the latter half of the century. Today, the science continues to advance. Robot welding is commonplace in industrial settings, and researchers continue to develop new welding methods and gain greater understanding of weld quality.
Hello everyone! I just got my semi auto converted bolt back in and i am ready to start welding up my kit. However I only have one hang up. I only have a Titanium 125 flux core welder. Do you think this will work okay? I have access to a bunch of different grinding and sanding tools.
Got some old stuff from my grandpa a while back, he's long past ever needing it and I don't have much use for it.
This stuff is a little on the older side but from what I can tell, it's mostly all in okay shape. The knobs and levers on the torches all move like they should, the gauges aren't...
Have some welding tools for sale. All are in good shape. Barely been used.
-Bernard electrode holder with 6ft Direct Ultra-Flex 2AWG lead.
-Bessey MG2 magnetic ground clamp
-Estwing chipping hammer
-6lb sledge hammer
$40 for the lot. Will throw in a welding bucket and wire brush with the package.
Something like 250 cu ft or something like that. Would rather buy one a bit cheaper than a brand new one. If you are willing to sell please contact me. I'll always be willing to trade for 762x39 or A rifle. Also looking for a tig welder. I have an sks or a mosin willing to trade. Also have cash...
52" Husky Toolbox
Like new condition.
No dents, scratches or stickers.
Miller Digital Elite welding hood
In good shape, come with extra lense covers
May trade for guns or silver bullion.
2006 E250 ford van with broken drivers seat.
the culprit is a thin walled tubing with cams on both ends which lift the rear of the seat that has stresses fractured and separated from its intended purpose:
Not having the proper tools and possibly the strength to lift the seat, my preference...
Any welders out there need some 1/8" E6010?
Sealed 10 lb. can Lincoln E6010 5p+ $20 OBO
Also have a Fibre-metal fillet gauge - $10
Magnetic squares -- Bessey WMS-5
At your convenience in SE PDX / Clackamas
I have a pair of cylinders in the garage.........just two, but still a lot of power...
This is amazing to watch. No wonder they have us post “NO SMOKING” signs in the front window when there are tanks of oxygen delivered to the house.
Have you wondered what would happen if a delivery truck...