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A) FIRST DRY DRAWING:
Wire rod surface treatments:
mechanical descaling
mechanical descaling +
lime or
borax coating
sand blasting
acid pickling +
lime or
borax or
salt
coating
acid pickling +
phosphate
+
lime or
borax
others
Drawing schedule:
inlet ุ: mm
outlet ุ: mm
n.
of drafts:
speed (last draft) : m/s
Type of machine : straight
line
double deck
bull block
tipo morgan
Devices:
rotating die: (
yes, drafts n -
no )
pressure die: ( yes,
drafts n - no )
Note: For finished wires
fill directly paragraph D)
B) INTERMEDIATE TREATMENTS:
no
degreasing
......................
..
annealing/patenting
acid pickling ..............
.
acid pickling + lime op.
borax op.
salt
coating
zincatura a caldo
metallic coating :
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