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Manufacturing & Metalworking

Welding

Welding Article

Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material (the weld puddle) that cools to become a strong joint, with pressure sometimes used in conjunction with heat, or by itself, to produce the weld. This is in contrast with soldering and brazing, which involve melting a lower-melting-point material between the workpieces to form a bond between them, without melting the workpieces.

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 can be done in many different environments, including open air, underwater and in space. Regardless of location, however, welding remains dangerous, and precautions must be taken to avoid burns, electric shock, poisonous fumes, and overexposure to ultraviolet light.

Until the end of the 19th century, the only welding process was forge welding, which blacksmiths had used for centuries to join metals by heating and pounding them. Arc welding and oxyfuel welding were among the first processes to develop late in the century, and resistance welding followed soon after. Welding technology advanced quickly during the early 20th century as World War I and World War II drove the demand for reliable and inexpensive joining methods. Following the wars, several modern welding techniques were developed, including manual methods like shielded metal arc welding, now one of the most popular welding methods, as well as semi-automatic and automatic processes such as gas metal arc welding, submerged arc welding, flux-cored arc welding and electroslag welding. Developments continued with the invention of laser beam welding and electron beam welding in the latter half of the century. Today, the science continues to advance. Robot welding is becoming more commonplace in industrial settings, and researchers continue to develop new welding methods and gain greater understanding of weld quality and properties.

Welding Items

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HELMET MASK WITH SOLAR POWER CELL AUTO DARK FOR WELDING
$39.99
New Lincoln Welder V275-S Model # 2269-1 w/Leads
$510.00
Lincoln Tig Torch
$50.00
WP-24 TIG Torch Body New 80 amps Air Cooled Heliarc
$9.99
Lors Butt Welder
$2000.00
Dominick Hunter Breathing Air Purification System
$0.10
Miller Maxstar 200SD Brand New!
$1599.00
POW CON POWER DRIVE II WIRE FEEDER WELDER WIRE FEEDER
$495.00
Ezee Roll Cylinder Cart 3202, 20" steel max cyl dia 26"
$243.75
ThermalArc Arcmaster 185 ACDC TIG/Stick Pkg
$2275.00
BINZEL 127.9003 17' .035" MIG GUN LINER
$20.00
Lincoln LN-25 Mig Welder
$950.00
Arcos Alloys 87% Ni welding wire
$199.00
Welder's Helper Copper Backing Support Spoon *NEW*
$9.99
welder lincoln weldenpower 250d with 7kw generat diesel
$2000.00
TIG Torch Accessory Kit AK-3 WP-18 Series Torch
$42.50
TWECO WELDER GROUND CABLE AND CLAMP SGC-500.
$19.99
VICTOR CUTTING TORCH HEAD ATTACHMENT.
$100.00
OKI Bering 2% Thoriated Tungsten Electrodes 1/8" *NEW*
$9.99
Rod Guard, Screw Top, for 36" TIG Rod, P/N MTLRG-300-12
$17.83
TurboTorch STK-99 Torch Kit EXTREME 0386-0851 NEW
$15.50
Welding Caps & Beaver Tails, (Fireman)
$5.50
General Purpose Multistage Gas Regulator VERIFLO
$30.00
CYLINDER CART for large oxy & medium fuel gas cylinders
$49.00
40A New Plasma Cutter CUT40 Inverter 220V Voltage
$199.00
NEW SOLAR AUTO DARKENING WELDING GRINDING HELMET HOOD B
$59.95
General Purpose Multistage Gas Regulator MATHESON
$30.00
Lincoln Tig Torch
$50.00
Lincoln Tig Torch
$50.00
10 lbs CastIron Welding Nickel 99 Rod Stick Electrodes
$200.00
welder millermatic 251
$1000.00
NEW Oxy Acetylene Welding Cutting Torch Kit Fits Victor
$59.95
Weldit 6010 5/32 Welding Rods 10 lbs & Holder USA Made
$13.95
2006 Miller 400D Diesel Welder on Trailer Duetz CC/CV
$7000.00
Tillman 24CS TIG Gloves
$6.50
Lincoln LN-25 Mig Welder
$960.00
Ezee Roll Cylinder Cart 6104 10" Poly max cyl dia 18.5"
$135.74
WELDING GLOVES, TILLMAN 1250L
$4.95
Alumaloy Rods Aluminum Repair Rods NO WELDING (1/2LB)
$14.45
WeldingPro 400 Amp Mig Gun Miller back end WPM415-3545
$129.00
NEW WELDCRAFT 12.5' RUBBER POWER CABLE TIG HOSE WELDING
$29.50
AIRCO 1114-1526 CONTROL CABLE
$25.00
LINCOLN WIRE FEEDER FOR PARTS ONLY
$50.00
General Purpose Multistage Gas Regulator Fisher Science
$30.00
40A New Plasma Cutter CUT40D Inverter Dual Voltage
$229.00
Auto-Darkening Welding Helmet
$150.00
Lot of 6 pc WP-24 TIG Torch Body ~New~ 80 amps Air Cool
$49.99
1997 Lincoln DC-600 Multi-Process Welder
$1800.00
NWT Black Stallion Welding Jacket 2XL
$32.00
General Purpose Multistage Gas Regulator MATHESON
$30.00
WELDING GOGGLES ~ SPECIAL NON FOG FLIP UP LENS ~ NEW!
$0.99
TIG heliarc torch body welding metal ornamental art @@
$18.00
2002 Miller 302D Diesel Welder / Generator CC/CV Duetz
$5400.00
3) WELDER MAGNETS 50lb METAL FAB MIG TIG TACK WELDING
$9.98
WELDING HELMET AUTO DARKENING MIG TIG ARC GAS WELDERS 7
$25.49
400 Amp, 15' MIG Gun, Miller End, .035 .045
$157.09
WP-24 TIG Torch Body New 80 amps Air Cooled Heliarc
$9.99
AUTODARK WELDING HELMET MASK for mig wire tig arc MAG
$24.99
Exciter Thermal Arc welder/generator
$350.00
Sellstrom Auto-Darkening Titan Helmet Finish Line
$149.61
General Purpose Multistage Gas Regulator MATHESON
$30.00
welding Helmets
$78.00
New Sellstrom DP4 Faceshield w/ Flip-up Shade 5 Visor
$38.54
LINCOLN ELECTRIC 0.45" SUPER ARC L-50 WELD WIRE1,000 LB
$100.00
PRO-ARC ALUMI-PRO WELDING KIT FOR ALUMINUM
$4.99
AUTODARK WELDING HELMET MASK for mig wire tig arc MAG
$24.99
2 Acetylene Cutting Torch Tips 3-1-101 FITS VICTOR New!
$11.99
Hobart Handler 125 EZ, Flux Cored Wire Feed Welder, New
$372.65
New Sellstrom DP4 Faceshield w/ Flip-up Shade 8 Visor
$38.54
Arc Welding Gouger
$49.99
General Purpose Multistage Gas Regulator VERIFLO
$30.00
Welding Caps & Beaver Tails, (USMC or USAF)
$5.50
WELDING GOGGLES ~ SPECIAL NON FOG FLIP UP LENS ~ NEW!
$0.99
250 Amp, 15' MIG Gun, Tweco End, .030 .035
$136.16
Lincoln Tig Torch
$50.00
Linde V1-252 MIG WELDER-Cobramatic Wire Feed USED
$1499.99
Sellstrom Auto-Darkening Titan Helmet Born to Ride
$149.61
GRABER WELDING ROD POUCH
$29.50
50A New Plasma Cutter CUT50D Inverter Dual Voltage
$249.00
Weldmark Leather Cape Sleeve - Large, New!!!
$44.00
5 LP Propane Cutting Torch Tips 1-3-GPN FITS VICTOR New
$24.95
VINTAGE VICTOR PERFORMANCE WELDING/CUTTING OUTFIT
$30.89
Hobart Welder (Gas Solenoid/Gas Hose) Hobart Handler
$49.95
OXY ACETYLENE MINI CUTTING TORCH SET OXYGEN ACETYLENE
$102.50
ParkerMP 40A Plasma Cutter/160A TIG/Stick DUAL VOLTAGE!
$599.99
28.5# 308L /.045 Stainless solid Mig wire NR
$49.00
8" DIA X 60" LENGTH FLEXIBLE DUCTWORK HOSE
$40.00
New Weldmark E71TGS .030" Flux Core Wire, 10lb. Spool
$53.60
400 Amp, 15' MIG Gun, Lincoln End, .035 .045
$157.09
2006 Miller 250D Diesel Welder /Generator CC/CV Kubota
$5000.00
Solar Auto Darkening Welding Grinding Helmet Hood Mask
$69.99
TIG Torch Accessory Kit AK-4 WP-20 Series Torch
$40.83
20# 308L /.045 Stainless Flux Core Mig wire NR
$39.00
VICTOR CUTTING TORCH ST2600FC OXYGEN ACETYLENE 21"
$85.00
25 FT OXYGEN AND ACETYLENE TWIN HOSE WELDING TOOLS
$14.99
LOTOS CUT 50 DX A 50A AMP AMP INVERTER PLASMA CUTTER NR
$359.00
Lot of 6 pc WP-24 TIG Torch Body ~New~ 80 amps Air Cool
$49.99
Linde Mig Welder V1-253 /Power Supply /Type SWM 35 USED
$899.99
18# 309L /.045 Stainless Flux Core Mig wire NR
$39.00
Anchor Ground Pure Tungsten Electrodes 1/16" x 7" *NEW*
$9.99