The article considers the problem of effective and high-quality restoration of road construction machines and equipment. Operational features of reliable and high-precision equipment for road and construction works require high costs for maintaining the operability of machines. Since mainly foreign-made equipment is used, replacing worn-out, especially functionally important parts is very costly. To ensure the requirements of reliable and safe operation of road construction machines, a systematic approach to solving these problems is required, which is decided by the authors through developing an original model of the optimal choice of energy efficient technology for the restoration of parts of road construction machines, with the goal being the highest quality of the part after restoration.

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We investigated the dynamics of LSFL (Low Spatial Frequency LIPSS) evolution on the titanium alloy surface. To create them, 12 W picosecond 1.064 μm laser with a pulse repetition rate from 50 kHz to 500 kHz was used. For different laser repetition rate (500, 150, 100 and 50 kHz), the ranges of LSFL periods and peak Fluence of pulse (Fp) for which the maximum period is reached were determined. We also determined the laser parameters at which the resulting LSFL have good quality and uniformity, regardless of the initial surface roughness.

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