1.15 Repair methods
Inclusions
The most frequent types of inclusions are oxides. These form
when small fragments of oxide film fall into the weld pool, as
the oxide layer was not removed prior to welding.
As these fragments are in general very fine and uniformly
distributed, they have no discernible influence on the strength
of the weld bead.
This, however, is not the case in the event of insufficient
shielding gas coverage or air infiltration. In these cases,
larger oxide inclusions may be formed, resulting in significant
notching due to material separation.
End craters
A crater forms at the end of each weld bead, which must be
filled
(Fig. G)
.
To do this, do not turn the welding torch off at the end if the
weld bead. The melting welding wire fills the crater
(Fig. H)
.
Alternatively, turn the welding torch on and off repeatedly until
the crate has been filled.
G
H
Copyright ©
2010
Summary of Contents for 458 Italia
Page 1: ......
Page 24: ...1 7 Car Bench vehicle bench Copyright 2010 ...
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Page 522: ...Hook 95977564 AS 107564 for lifting the gearbox Page 5 of 5 Specific tooling and equipment ...
Page 586: ...In preparation Page 6 of 6 Engine overhaul Disassembly ...
Page 620: ...Perform the Fuel tank tightness test cycle Page 4 of 4 Fuel level sensor ...
Page 967: ...Refit the wheels D2 01 Page 10 of 10 Stabiliser bars Tie rods ...
Page 1127: ...Refit the wheels D2 01 Page 8 of 8 Wheelhouse ...
Page 1167: ...Prise out and remove the plug 4 Undo the nut 5 Undo the nut 6 Page 32 of 37 Doors ...
Page 1242: ...In the LOWEST position two movements are possible Page 8 of 12 Seats ...
Page 1243: ...In the INTERMEDIATE LOW position three movements are possible Page 9 of 12 Seats ...
Page 1244: ...In the INTERMEDIATE HIGH position three movements are possible Page 10 of 12 Seats ...
Page 1549: ...Reconnect the battery F2 01 Page 5 of 5 Starter motor ...
Page 1721: ...Charge the air conditioning system F5 12 Page 5 of 5 Condenser ...
Page 1740: ...Refit Page 13 of 13 A C unit ...
Page 1764: ...FD0001 Fuel supply distribution 0 99999 Page 10 of 56 PDF ...
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