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Wear resistance of selected cultivator coulters reinforced with sintered-carbide plates

Stawicki T., Kostencki P., Białobrzeska B.

Archives of Civil and Mechanical Engineering

2018

Vol. 18, no. 4

1661--1678

Within the research, wear resistance of coulters used in cultivators was evaluated. Three constructional solutions of the parts were examined: (A) coulters reinforced in the blade area with brazed-on sintered-carbide plates; (B) coulters reinforced in the blade area with sintered-carbide plates and in their further part by pad-welding; (C) coulters with no reinforcement (made of homogeneous material). The examined parts were installed on a four-beam cultivator that was next used for cultivation of loamy-sand soils with significant humidity. In comparison to the non-reinforced coulters, those reinforced with sintered-carbide plates only and with additional pad-welding were characterised by decidedly high resistance to abrasive wear. Reinforcement of coulters resulted in a change of their limit-state condition. Plates made of sintered carbides decreased rate of length reduction of the parts, which led to big loss of their thickness in the base material area. The limit wear condition of the coulters was related to rubbing-through or reduction of bending strength modulus of the coulters that broke when hitting at stones. For the non-reinforced coulters, the limit wear condition resulted from excessive reduction of their length.