WELDING OPERATIONS I - OD1651 - LESSON 1/TASK 1
content.
Manganese promotes the formation of sound welds.
(4) If the heat treatment given the wire core of an electrode
is not uniform, the electrode will produce welds inferior to
those produced with an electrode of the same composition which
has been properly heat treated.
(5) This completes the discussion of classifying types and uses
of electrodes.
The succeeding paragraphs describe the welding
processes, materials, and identification processes of automotive
welding.
3.
Automotive Welding Processes, Materials, and Identification
a. Determining Weldability of Equipment.
Before repairing any
damaged materiel, it is necessary to first determine whether or
not
the
material
can
be
satisfactorily
welded.
This
determination can be made by considering the following factors:
(1) The nature and extent of the damage and the amount of
straightening and fitting of the metal that will be required.
(2) The possibility of restoring the structure to an operable
condition without welding it.
(3) The type of metal used in the damaged part, whether it was
heat treated, and if so, what heat treatment was used.
(4) If the welding heat will distort the shape or in any manner
impair the physical properties of the part to be repaired.
(5) Determine if heat treating or other equipment or materials
will be required in order to make the repair by welding.
b. Determining Weldable Parts.
Welding operations on Army
materiel are restricted largely to those parts whose essential
physical properties are not impaired by the welding heat.
Successful welded repairs cannot be made on machined parts that
carry a dynamic load.
This applies particularly to high alloy
steels that are heat treated for hardness or toughness, or both.
springs, connecting
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