ОСОБЕННОСТИ ИЗНАШИВАНИЯ ВОССТАНОВЛЕННЫХ С ПОСЛЕДУЮЩИМ УПРОЧНЕНИЕМ КВДУ ЛЕМЕХОВ ОБОРОТНЫХ ПЛУГОВ

Abstract

The widespread use of plows from foreign manufacturers has led to the need to develop a restoration technology with subsequent hardening of replacement parts of their working bodies, in particular plowshares, due to their intensive wear. The situation is aggravated by the fact that there are currently significant interruptions in the supply of spare parts for foreign tillage equipment and a significant increase in their cost. Existing technologies for restoring parts of this type do not provide them with a high service life, and therefore require improvement.The wear features of reversible plow shares restored using wear-compensating elements followed by carbide-arc hardening (CAH) were studied in this work. Production tests were carried out using the shares of the Lemken EurOpal reversible plow when plowing medium and heavy loamy soils. Spring sheets made of steel 65G, which had lost their elasticity, were used as the material of the compensating element. A multicomponent paste containing 65% matrix powder PR-Kh30SRNDYu, 25% boron carbide and 10% cryolite was used for CAH. The specific wear of the cutting surfaces of plowshares along the width was studied in three sections. The production tests carried out made it possible to establish that the increase in wear of the cutting surfaces of both serial shares in the delivery state and those restored with subsequent hardening of the highpressure unit with an increase in their operating time is subject to a linear relationship. The greatest wear, regardless of the operating time of the ploughshare, is in the heel area, the least wear is near the bit attachment area. Restoring the studied shares with subsequent CAH on the rear side makes it possible to increase their operating time to 76 hectares, which is on average 1.8 times higher than that of serial shares in the delivered state. The use of the proposed technology will help solve the problem of resource conservation and import substitution.