METHOD OF RECOVERY OF WORKING TOOLS OF DEEP TILLERS 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 on entire surface area of an overlay plate, herewith there is used ball-bearing steel ShH4 of strip rolled stock with width of 10 mm, with thickness of 4.5 mm, 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 1.6-2 mm, voltage 30-32 V, deposition rate of 20-25 m/h and wire electrode feed rate of 100-125 m/h, and electrode material of composition is used as a wear-resistant material, wt.%: C 2.0; Mn 0.9; Si 1.0; Al 0.6; Cr 9.2; Ni 4.3; Mo 0.5; Fe is rest, at that thickness of built-up layer makes 1.5-2.0 mm, its hardness makes 59-61 HRC.

EFFECT: invention increases hardness and wear resistance of reclaimed and hardened working tools of deep tillers in conditions of intensive abrasive wear.

1 cl, 1 ex