Advanced Welding Processes: Technologies and Process Control

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Index
fumes 56–7
gas-shielded 52, 54–5
hardfacing and surfacing alloys 53–4
limitations 55–7
metal-cored 53, 108, 125
modes of operation 51–2
pulsed flux-cored 125–6
rutile flux-cored 53, 108–9, 125
self-shielded 52, 53, 54, 109
slag shielding 51
stainless steel flux-cored 54, 69
free-flight transfer 100
Freon 70
friction welding 5–7, 24
front face light sensing 214
front face vision 214–15
fully automated remote welding 237–8
fumes 56–7
fusion characteristics 61–2
fusion welding 2, 8–15
gantry robots 226–7
gas metal arc welding (GMAW) 12–13,
22–3, 47–8
arc length 117, 131–2
burn-off 116, 124–5, 254–6
control systems 113–20, 128–34
controlled droplet detachment 121–2
deposition rates 71
extended operation 134
filler materials 47–8
high deposition welding 134
Hybrid Laser GMAW 155
melting rate phenomena 114–16
metal transfer 100–13
narrow-gap GMAW 170–4
parameter selection 117–19, 132–3
power source 117–19
programmed control 128–34
pulsed GMAW 120–1, 124–5
shielding gases 64–7, 68
single-knob control 128–34
stability monitoring 197–8
stitch welders 224–5
synergic control 128–34
tractor systems 221
user parameter selection 132–3
voltage-current characteristics 116–17
wire feed systems 117
gas tungsten arc welding (GTAW) 8–9,
74–99
A-TIG welding 91
arc initiation 74–9
arc length 93
buried arc GTAW 91
cast-to-cast variation 95–8
cold-wire GTAW 82–3, 168
control systems 91–8
current and travel speed 92
dual-gas GTAW 84–5
electrode development 74–9
electrode vertex angle 94–5
filler addition 95
high current GTAW 91
high-frequency pulsed GTAW 79–81
hot-wire GTAW 83, 168–70
laser-enhanced 155
multicathode GTAW 89–91
narrow-gap welding 168–70
polarity 93
process developments 74–9
pulsed GTAW 79–81, 98
shielding gases 67–8, 94
tractor systems 221
variable polarity GTAW 81–2
gas-shielded flux-cored wires 52, 54–5
gases
gas-metal reactions 60
for laser welding 71–2
shielding gases 58–73
globular drop transfer 101–2
globular repelled transfer 102
GMAW see gas metal arc welding
(GMAW)
gravitational force 111
GTAW see gas tungsten arc welding
(GTAW)
Hall-effect probes 194
hardfacing and surfacing alloys 53–4
heat affected zone (HAZ) 182
helium 59, 63, 66–7, 72
high current GTAW 91
high deposition welding 134
high frequency pulsing 150
high-current plasma welding 89
high-energy density processes 136–64
electron beam welding 14–15, 157–64
keyhole welding 137–44
laser welding 15, 24, 144–57