Methods of restoration and hardening of agricultural machinery parts

摘要

The paper deals with the methods of restoration and hardening of agricultural machinery parts both in our country and in several foreign countries. The main objective of the study is to examine the changes in the structure of working surface of parts during the ordinary and vibration deformation for further use in the manufacturing process of restoring the worn parts by vibration hardening of their working surfaces. The paper considers some methods of restoration of working parts of agricultural machinery, which because of complex manufacturing processes, expensive processing equipment, high costs have not yet found wide application in the agricultural repair production. The mechanism of hardening the surface layer material of parts under vibratory loading was revealed. It was shown that the hardening of material is related to the formation of barriers for moving dislocations, which contributes to the greater compaction (hardening) of the surface. The parameters influencing the rate and degree of deformation were defined.