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A promising method of hardening the working bodies of agricultural machines by soldering is considered. The method is based on the hardening and restoration of parts by soldering cermet plates. A VK-8 hard alloy (tungsten–cobalt alloy with 8% cobalt and 92% tungsten carbide) is used as the material of the plates. The dependence of the adhesion strength of the metal plowshare–cermet joint on the angle of wetting with a solder, the area of its spreading, and the gap is studied. Under rational soldering conditions, the adhesion strength between the cermet plates and plowshare steel is 120–125 MPa. The experimental research methodology also includes comparative laboratory and operational tests of commercial and experimental plowshares restored by soldering the cermet plates. The experimental plowshares restored according to the developed technology are found to have high abrasive and corrosion-mechanical wear resistance. The use of cermet plates allows us to increase the resource of the restored plowshares by 4.6–5.0 times as compared to commercial plowshares. The developed technology is recommended for implementation at repair and technical enterprises engaged in the repair and restoration of agricultural machinery.
Гончаренко et al. (Wed,) studied this question.