FIELD AND LABORATORY WEAR TESTING OF INTEGRAL SEEDBED IMPLEMENT'S CHISEL TINES POINT

Within the work of preparing the seedbed using the Combiner, the chisel type active bodies are the most subjected to wear. This is due to the contact (friction) with soil/sand, but also to the draft resistance encountered on the frontal part of the body. The paper presents the results of experimental researches conducted to determine the wear of two active bodies for soil tillage in the field (in real conditions), respectively on laboratory stand (in accelerated regime, in sand). The tested active bodies were hardened through two different methods. Field tests showed that the smallest wear (1.51%) was obtained for chisels hardened by MAG procedure, using cored wire as filling material, and highest wear (4.11%) was obtained for chisels loaded with an electrode coated by tungsten carbide.