METHOD OF INCREASING WORKING CAPACITY OF WORKING ELEMENTS FOR SOIL CULTIVATION Russian patent published in 2020 - IPC B23P6/00 B23K9/04 A01B15/04 

FIELD: technological processes.

SUBSTANCE: invention relates to reconditioning of worn-out parts with application of welding and can be used for restoration of working elements of tillers. Method comprises removal of worn-out cutting-and-bladed part of bit, production of overlay plate from steel of rolled stock and its welding to reconstructed bit, hardening of surface of an overlay plate by welding-on of wear-resistant material along entire surface area of an overlay plate, wherein ball-bearing steel ShH4 of rolled stock with width of 15 mm, with thickness of 5.0 mm is used, rolling is cut to size of cutting part, welded parallel to cutting part, hardening is performed by electric arc surfacing with direct current of reverse polarity under flux layer at current intensity of 160-220 A, diameter of electrode wire of 2.2-2.4 mm, voltage of 30-32 V, deposition rate of 20-25 m/h and wire electrode feed rate of 120-135 m/h, and electrode material of composition is used as wear-resistant material, wt.%: C 2.0; Mn 0.9; Si 1.0; Al 0.6; Cr 13.6; Ni 6.7; Mo 2.0; Fe - balance, at that thickness of built-up layer makes 2.5-3.0 mm, and its hardness - 60-61 HRC.

EFFECT: invention improves hardness and wear resistance of reclaimed working elements in conditions of intense abrasive wear.

1 cl, 1 ex