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Welding processes work around the melting point of the base metal and require the base metal itself to begin melting. They usually require more precise distribution of heat from a small torch, as melting the entire workpiece is avoided by controlling the distribution of heat over space, rather than
136:, bare electrode wire or rod, tubular electrode wire, and welding fluxes. Sometimes non-consumable electrodes are included as well, but since these metals are not consumed by the welding process, they are normally excluded.
110:, a major use for the filler rod is as a consumable electrode that also generates heat in the workpiece. An electrical discharge from this electrode provides heat that melts both the electrode and heats the base metal.
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aluminium alloy, use offcut strips of the same metal as filler. Steels are usually welded with a filler alloy made specially for the purpose. To prevent rusting in storage, these wires are often lightly copper plated.
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Filler alloys have a lower melting point than the base metal, so that the joint may be made by bringing the whole assembly up to temperature without everything melting as one. Complex joints, typically for jewelry or
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is an electric welding process that uses a non-consumed tungsten electrode to provide heat, with the filler rod added manually. This is more like gas welding as a process, but with a different heat source.
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boilermaking, may be made in stages, with filler metals of progressively lower melting points used in turn. Early joints are thus not destroyed by heating to the later temperatures.
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processes only require part of the existing base metal to be melted and this is sufficient, provided that the joint is already mechanically close-fitting before welding.
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excavating tools or digger bucket teeth. A hard, but more expensive and sometimes brittle, facing alloy is deposited onto the wear surfaces of mild steel tools.
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use a higher temperature filler that melts at a temperature which may approach that of the base metal, and which may form a eutectic alloy with the base metal.
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Soldering and brazing processes rely on a filler metal added to the joint to form the junction between the base metal parts.
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A specialist use for filler metal is where a deliberately different metal is to be deposited. This is often done for
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uses a filler that melts at a lower temperature than the workpiece, often a lead-tin solder alloy. Brazing and
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limiting the maximum heat. If filler is used, it is of a similar alloy and melting point to the base metal.
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or hammer welding uses hammering to close up the hot joint and also to locally increase its heat.
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and are a major factor in that method's popularity.
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149:Covered electrodes are used extensively in
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16:Metal added to join two other metal parts
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31:added in the making of a joint through
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165:and bare electrode rods are used in
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210:, welding processes without filler
177:Tubular electrode wire is used in
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161:Bare electrode wires are used in
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356:Shielded metal (Stick/MMA/SMAW)
346:Gas tungsten (Heliarc/TIG/GTAW)
341:Gas metal (Microwire/MIG/GMAW)
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321:Atomic hydrogen (Athydo/AHW)
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189:Welding fluxes are used in
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151:shielded metal arc welding
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379:Electric resistance (ERW)
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167:gas tungsten arc welding
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173:Tubular electrode wires
203:Amorphous brazing foil
179:flux-cored arc welding
573:Tools and terminology
224:: Pearson Education.
191:submerged arc welding
163:gas metal arc welding
157:Bare electrode wires
409:Friction stir (FSW)
384:Electron-beam (EBW)
94:processes, such as
506:Heat-affected zone
434:Oxyacetylene (OAW)
208:Autogenous welding
145:Covered electrodes
81:Autogenous welding
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389:Electroslag (ESW)
336:Flux-cored (FCAW)
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424:Laser-hybrid
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21:metalworking
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543:Fabrication
521:Weldability
313:Arc welding
114:TIG welding
108:arc welding
100:Birmabright
92:gas welding
563:Metallurgy
444:Ultrasonic
439:Spot (RSW)
394:Exothermic
222:New Jersey
215:References
134:electrodes
127:hardfacing
121:Hardfacing
65:live steam
558:Machining
553:Jewellery
465:Electrode
458:Equipment
47:Soldering
41:soldering
593:Category
568:Smithing
404:Friction
197:See also
599:Welding
578:Welding
548:Forming
538:Casting
305:Welding
71:Welding
37:brazing
33:welding
475:Helmet
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85:Forge-
485:Robot
449:Upset
399:Forge
331:Flash
140:Usage
90:Many
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29:metal
27:is a
226:ISBN
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