Typical
Wear Resistance by Comparison
Rating Wear
resistance under controlled testing procedures by NATA
certified and approved experts produced the above
typical results. They included tests for abrasion and
impact under both high and low stress conditions.
However any rating
is dependent on a number of variables, such as the type
of testing procedure adopted, the type of test carried
out (high stress abrasion, low stress abrasion), the
load applied in the test, speed variations, calibration
anomalies etc. Results “in the field” do vary
markedly according to the type of material, impact
loads, speed of flow, support structures, consistency of
flow and material, particle size, particle shape,
correct machinery calibrations and other criteria.
Hardfaced Wear
Plate has achieved results as high as 30:1 over
mild steel and as low as 12.6:1.
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Attaching
Hardfaced Wear Plate
Three of the most
common methods to attach Wear Plate are:
 |
 |
 |
|
Nelson
Studs |
Countersunk Insert |
Plug
Weld |
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Cutting
Plasma arc is the
preferred method, however, arc air and friction disc are
also effective.
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Cold Forming
Hardfaced can be
bent by either press brake or rolling (Wear surface
inside) to a diameter of 600mm.
To form Hardfaced
to smaller diameters (200mm min) it is recommended that
4mm on 8mm and 7mm on 10mm be used.
Forming Hardfaced
with the wear surface on the outside, a minimum of 1
metre diameter is recommended.
Forming should be
carried out at right angles to the weld runs.
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Welding
The low carbon
steel substrate of Hardfaced Wear Plate can be welded
using normal consumables for MMAW and GMAW for mild
steel.
The wear surface
has negligible yield strength; hence no structural
welding should be performed on this surface.
It is important
when weld preparation is carried out, that any dilution
from a structural weld into the hard facing will result
in carbon pick up and likely cracking of the weld.
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