On the example of Hadfield steel, as the most common material of fast-wearing parts of mining equipment,
the effect of surface hardening by plastic deformation on their impact and abrasive wear resistance is considered.
Wear test is conducted on magnetic ironstone as typical representative of abrasive and hard rock. As result of wear
of initial samples with hardness of ∼200 HB and samples pre-hardened with different intensities to the hardness of
300, 337 and 368 HB, it is found that during the initial testing period, the initial samples pass the “self-cold-work
hardening” stage with increase in hardness to ∼250 HB, which remains virtually unchanged during further tests;
the hardness of the pre-hardened samples does not change significantly throughout the tests. It is established that
the rate of impact-abrasive wear of pre-hardened samples is significantly (up to 1.4 times) lower than the original
ones that are not subjected to plastic deformation, and decreases with increasing degree of cold-work hardening.
Preliminary surface hardening by plastic deformation can serve as effective way to increase the service life of
fast-wearing working parts of mining equipment.
Selected Properties Of Thermally Sprayed Oxide Ceramic Coatings
