Acta Univ. Agric. Silvic. Mendelianae Brun. 2005, 53, 175-186
Published online 2014-12-22

Influence of heat treatments on the abrasive wear

Jiří Votava, Michal Černý, Josef Filípek

Ústav techniky a automobilové dopravy, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika

The particular samples were made of the steel 14 260 and were exposed to following different heat treatments − soft annealing, normalizing, heat refining and hardening. After these heat treatments the samples were exposed both laboratory tests and also field tests. The wear test particles was carried out on the device with abrasive canvas. The laboratory test was realized in room temperature and normal atmospheric pressure. Measured values were statistically and graphically analyzed and interpreted. Results of the tests confirmed our preliminary expectations that the extent of the wear would depend on the value of hardness of the used materials. The hardest structure of the hardened steel had the smallest material decrease compared to the largest decrease of the soft annealing steel.
Tested samples were fixed to a cutting edge of a ploughing aggregate which performed work in previously determined sector area. At intervals of each 400 meters there were measured decreases of weights and surfaces of the samples and consequently were evaluated and graphically interpreted relating abrasive wear of the particular samples. Also in this test the results form previous laborator test were confirmed and the smallest wear had the hardened steel samples.
On the basis of the measured values we can deduce the high importance of the right choice of the adequate material which is able to resist to the wearing process best. This decision will significantly affect not only the length of the service life of the particular parts but also the whole machinery as well as its economic operation.


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