Page 265 - Welding of Aluminium and its Alloys
P. 265
236 Index
pulsed MIG 121–124 solidification cracking see hot cracking
shielding gases 130–133 solid solution strengthening see alloying
spot welding 144–146 storage of parent metals 52
terminating the weld 140–141 strengthening mechanisms 10–18
torches 125–126 strength loss 31–34
torch positioning 138–140 in HAZ 32–34
twin wire 124–125 in weld metal 31–32
wire feeders 127–128
TIG welding
non-destructive testing 205–215 effects of HF 100
eddy current 207–208 mechanised/ automated welding 114–
penetrant 205–207 115
radiography 211–215 parameters (argon shielding) 104
ultrasonic 208–211 parameters (helium shielding) 113
process principles 97–101
penetrant examination 205–207 shielding gas 102–106
plasma arc cutting 52–58 spot and plug welding 115
health and safety 56–58 torches and cables 106–107
parameters 55 torch manipulation 110–112
principles 52–54 tungsten electrodes 108–109
plasma arc welding
parameters 149 ultrasonic examination 208–211
plasma MIG 150
process principles 147–149
variable polarity 149 water jet cutting 63–64
porosity 18–22 weldability 18–31
in autogenous welds 18 hot cracking 24–31
in parent metal 22 oxide film 22–24
effect of cleanliness 21 porosity 18–22
composition 20 welder approval
hose type 20 ASME IX 193, 196, 197
process 20 BS EN 287 Pt 2 191–193
gas dew point 20 BS EN 1418 197–198
ISO classification 200 welding procedure 181–182, 183
precipitation (age) hardening 16–17 welding procedure approval
ASME IX 188–190
resistance welding BS EN 288 Pt 4 182–188
flash butt welding 176–180 alloy grouping 184
power sources 167–169 range of approval 187–188
seam welding 175–176 test regime 185–187
spot welding 171–175
surface condition 169–171 x-radiography 213
