METHOD FOR RESTORING OPERATIONAL LIFE OF WORKING MEMBERS OF TILLING MACHINERY Russian patent published in 2021 - IPC B23P6/00 B23K9/04 A01B15/04 

FIELD: working of metal.

SUBSTANCE: invention relates to restoration of worn parts using welding and can be used the restoration of working bodies of tilling machines. The method includes removing a worn cutting-edge part of a chisel, manufacturing a cover plate from strip steel and welding said plate to the restored chisel, hardening the surface of the cover plate by surfacing a wear-resistant material over the entire surface area of the cover plate, wherein ball-bearing strip steel ShKh9, 14 mm wide, 5.5 mm thick, is used, the strips are cut to the size of the cutting part and welded parallel to the cutting part, hardening is executed by electric arc submerged surfacing with direct current of reverse polarity at a current strength of 170 to 230 A, diameter of the electrode wire 2.0 to 2.2 mm, voltage 30 to 32 V, surfacing rate 20 to 25 m/h and electrode wire supply rate 110 to 130 m/h, and electrode wire is used as a wear-resistant material with the following contents, % wt.: С - 1.9, Mn - 0.9, Si - 1.1, Al - 0.6, Cr - 7.5, Ni - 6.5, Mo - 1.0, V - 0.5, Fe the rest, wherein the thickness of the deposited layer is 2.2 to 2.6 mm, and the hardness thereof is 57 to 58 HRC.

EFFECT: invention allows improving hardness and wear resistance of the restored chisel under conditions of intense abrasive wear.

1 cl, 2 ex