10.2.1
The Stick (MMA) Process .....................................................................................................42
10.2.2
The TIG Process ....................................................................................................................43
10.2.3
The MIG Process ..................................................................................................................43
10.3
Joint Preparations.........................................................................................................................44
11
MIG BASIC WELDING GUIDE .............................................................................................................46
11.1
11.2
11.3
11.4
Position of MIG Torch ...................................................................................................................47
11.5
11.6
Travel Speed .................................................................................................................................47
11.7
11.7.1
Preselected Variables ...........................................................................................................48
11.7.2
11.7.3
11.8
11.9
11.9.1
11.9.2
Setting Voltage .....................................................................................................................50
11.9.3
11.9.4
11.10
11.11
11.12
11.12.1
Porosity Problems ................................................................................................................52
11.12.2
Wire Feed Problems .............................................................................................................53
11.12.3
Weld Quality Problems ........................................................................................................54
12
12.1
Size of Electrodes .........................................................................................................................56
12.2
Storage of Electrodes ...................................................................................................................56
12.3
Electrode Polarity .........................................................................................................................56
12.4
12.4.1
12.4.2
Manganese Steels ................................................................................................................56
12.4.3
Cast Iron ...............................................................................................................................56
12.5
Types of Electrodes ......................................................................................................................57
12.5.1
MILD STEEL: .........................................................................................................................57
12.5.2
CAST IRON: ...........................................................................................................................57
12.5.3
STAINLESS STEEL: .................................................................................................................57
© Weldclass 2019 | E.&O.E. | Edition 2.2
WF-255
MST
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