STUDY OF WEAR MONOMETALLIC AND STRENGTHENING TWO STRATUM EDGES WORKING BODIES

Abstract

The article is devoted to the problem of improving the reliability and durability of the aggregates of direct seeding. Special attention is paid to the question of wear and blunting of the blades cutting working body. Identified reasons for the decrease of intensity of processes of loss of the original shape of the teeth that helped to formulate the following research objective - testing of the prototype of monometallic and hardened specimens teeth of the cutting working body in the field of real operation with further choice of optimum materials to ensure the required level of wear resistance. The paper describes the methodology of the research and the process of field trials, during which the statistical data to study the dynamics of changing the shape of the blades, made of various wear resistant materials (monometallic without strengthening, steel 65G; manual arc surfacing T-590; argon-arc welding «Sormayt»; surfacing PRS-4) was obtained. Found that the blunting of the blades from the developments happening in the non-linear law at the beginning of bluntness more intensively but gradually reduces its speed). These processes are illustrated by the graph of the dynamics of wear and blunting of the cutting edges of the serrated blades of the working body. The analysis of this chart determined that the blunting of monometallic blades is fundamentally different from the group of double-layer toughened blades. Based on the conducted research the conclusion is made that the least of bluntness with the stabilization of the thickness of the cutting edge at 0.3 mm is observed in a two-layer blades of steel St.5. for manual arc welding with electrode T-590. Dynamics of wear and blunting of these teeth gives grounds for ascertaining the fact of the possibility to sharpen blades independently