Restoring Worn Components in Automobile Timing Mechanisms

Restoration of Parts of the Gas Distribution Mechanism of Cars in Mechanical Engineering

“…The most promising of the available methods for restoring worn machine parts, in economic, environmental, and engineering terms, is a thermoplastic technology, in which high-temperature heating and plastic deformation of the alloy displace metal to the worn surface from other areas [9].…”

“…During arc cutting, molten metal is removed from the cutting zone by mechanical action of welding arc and under the influence of own weight [7,9,10]. Low carbon steels, alloyed, nonferrous metals and cast iron can be cut by this method.…”

“…The most common methods of restoring worn components include the following: mechanized surfacing, often in combination with surface plastic deformation [5]; chemicothermal treatment (nitriding) [7]; bulk heat treatment [8]; rapid heating by high-frequency current with stepwise cooling (for pipes); thermomechanical treatment [9]; machining to obtain the required dimensions [10]; and local plastic deformation of a part heated to a specific temperature [11][12][13][14][15]. Surfacing changes the structure of the metal, which may have a negative impact on its physicomechanical properties.…”

“…When using Sv-08G2S or Np-16KhGSA electrode wire, satisfactory quality of the applied layer depends on subsequent surface hardening by plastic deformation. A deficiency of this method is that it is highly labor-intensive, on account of the subsequent machining of the applied layers and also the need for specific heat treatment [9,[16][17][18][19][20][21][22].…”