METHOD FOR RESTORING WORN-OUT WORKING BODIES OF TILLAGE MACHINES Russian patent published in 2021 - IPC B23P6/00 B23K11/04 C23C4/12 A01B15/00 

FIELD: agricultural engineering.

SUBSTANCE: The invention relates to the restoration of worn parts and can be used in the restoration of the working bodies of tillage machines. The method includes the removal of the worn-out cutting-blade part of the working body, the manufacture of an attachable plate made of strip steel SHH15SG with a thickness of 2.4 mm and its welding by contact-spot welding to the restored working body, hardening the surface of the attachable plate by surfacing wear-resistant material over the entire surface area of the attachable plate. Hardening is carried out by flame spraying in two stages. First, the sublayer is sprayed with a heat-sensitive powder 0.05-0.15 mm thick, and then the main layer with a wear-resistant powder alloy 2.1 mm thick, while the sublayer and the main layer are applied under the same spraying conditions: oxygen pressure 0.35-0.45 MPa, acetylene pressure 0.03-0.05 MPa, oxygen consumption 960-1100 l/h, acetylene consumption 900-1000 l/h, the distance from the nozzle tip of the mouthpiece to the surfaced surface 160-200 mm, powder consumption is 2.5-3 kg/h, while before spraying the part is heated to a temperature of 50-100°C.

EFFECT: invention makes it possible to increase the hardness and wear resistance of restored working bodies when working under conditions of intense abrasive wear.

1 cl, 1 ex