Preliminary communication
The Quality Influence of Base Material Surface Preparation on the Durability of a Sprayed Layer Against Radial and Axial Shear
Sanja Marušić
; Industrial- craft school, Slavonski Brod, Croatia
Vlatko Marušić
; Faculty of Mechanical Engineering, J.J. Strossmayer University of Osijek, Slavonski Brod, Croatia
Ivan Samardžić
; Faculty of Mechanical Engineering, J.J. Strossmayer University of Osijek, Slavonski Brod, Croatia
Abstract
For the purpose of this experiment, respective surfaces of 42CrMo4 base
material specimens were prepared for spraying using different technologies:
turning, cutting of radial notches and cutting of axial notches. Gas aided
thermal spraying of wire material was performed, laying a first layer of a
nickel aluminum compound and a final Chrome Molybdenum Steel coating.
Metallographic structure analysis and hardness measurement suggested
that surface preparation quality does not affect hardness of the sprayed
layer, but its thickness. Using a suitable tool, specimens were examined
on radial and axial shear and these results were compared to previous
ones. It could be determined that the notch size significantly affects both
the thickness of the intermediate layer and its even distribution around
the edge of the notch. A smaller radial notch allows for a higher torque
momentum at radial shear, whilst best overall properties are achieved with
axial notches subjected to radial loads. Testing axial shear, the cutting
power proved dependant of the depth of radial notches, where low depth
was inherent with low shear resistance.
Keywords
Base material; Metal spraying; Radial and axial shear; Surface preparation
Hrčak ID:
56746
URI
Publication date:
30.4.2010.
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