Hardfacing alloys for excavator teeth coating
Journal
Welding and welded structures
Date Issued
2024
Author(s)
Poser B. Maja
Petrevski, Martin
Pavlovic, Milos
Jeremic, Vladan
Abstract
The capacity of the rotоr excavator depends to a
significant extent on the backet teeth. Abrasive
wear of cutting teeth and cutting edges is typical
when digging sand, sandy clay and gravel in
common rock environments. Of particular
importance is the contribution of the correct
geometry of the teeth, their position on the backet,
and especially their sharpness, which they lose
over time. Over time, teeth become blunt due to
abrasive wear and their geometry changes. The
digging resistance becomes greater, and therefore
the efficiency of the rotor excavator decreases.
White cast iron stands out as a base alloy that has
wear resistance, but has very low toughness and
often brittle fracture under impact loads.
Manganese steel, although it has the property of
deformation strengthening, has no wear resistance
when digging in sand. This condition can be
improved by choosing a material more resistant to
abrasive action. Excavator teeth that fail due to
abrasive wear can be protected from abrasive wear
by the use of hardface coating. These hardfacing
alloys are presented in this paper.
significant extent on the backet teeth. Abrasive
wear of cutting teeth and cutting edges is typical
when digging sand, sandy clay and gravel in
common rock environments. Of particular
importance is the contribution of the correct
geometry of the teeth, their position on the backet,
and especially their sharpness, which they lose
over time. Over time, teeth become blunt due to
abrasive wear and their geometry changes. The
digging resistance becomes greater, and therefore
the efficiency of the rotor excavator decreases.
White cast iron stands out as a base alloy that has
wear resistance, but has very low toughness and
often brittle fracture under impact loads.
Manganese steel, although it has the property of
deformation strengthening, has no wear resistance
when digging in sand. This condition can be
improved by choosing a material more resistant to
abrasive action. Excavator teeth that fail due to
abrasive wear can be protected from abrasive wear
by the use of hardface coating. These hardfacing
alloys are presented in this paper.
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04-2024 CB.pdf
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Journal of Welding and welded structures vol.69 (4)
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