Zonal-distributed structuring of working bodies of the agricultural sector

Abstract

Increasing the wear resistance of working bodies of tillage machines is an urgent problem of the agricultural sector. During the operation of tillage machines, their working bodies, including cutting blades, are subjected to dynamic loads, abrasive and chemical effects of the external environment, which provokes their wear. A promising direction for increasing the wear resistance of chisel bit cutting blades is to manufacture them from gray cast iron, which has the ability to bleach, i.e. it can form a very hard and wear - resistant cementite eutectic (ledeburite) along with graphite eutectic. The results of comparative tests for wear of medium-carbon and high-carbon steels after thermal hardening and a sample of gray cast iron SHC 30 are presented. The optimal method of strengthening chisel plough bits cast from gray cast iron is proposed, which allows to increase their wear resistance. Replacing expensive materials, alloys and technologies with non-alloyed cast iron with a wear-resistant structure will significantly reduce the cost of working bodies of tillage machines. Proposals for the technology of obtaining castings for the manufacture of working bodies of tillage machines will improve their operational reliability.