Surface treatment of materials is an important component of laser technology that is constantly evolving. It provides the surface layer of parts of pre-specified physical and mechanical properties. Surface treatment combines a number of independent processes: surface heat treatment (annealing, quenching, tempering), surface microresistance and coating, surfacing, sintering, etc.

   The basis of the laser surface treatment methods are complex transient physical and chemical processes. Their knowledge, the ability to calculate them, to calculate individual cases, to predict the consequences and results of processing, to implement processes - all this is necessary for specialists of production, where modern laser technologies are implemented.

 The discipline "Technology of Laser Surface Treatment" refers to the cycle of professional and practical training, that is, special and based on the knowledge acquired by the student in the study of fundamental and professionally oriented disciplines higher mathematics and its special sections, physics, chemistry, descriptive geometry, engineering and computer graphics, construction materials engineering, strenght of materials, theory of mechanisms and machines, hydraulics, pneumatics and vacuum technology, materials science, metrology, interchangeability and standardization, machine parts, electrical engineering and electronics, physics of lasers, physics of concentrated energy flows interaction with substance, fundamentals of scientific research and technical creativity, electrophysical and electrochemical methods of material processing).

Lectures (Ukr, PDF)
Section 1. Laser surface treatment as a technological system.
Topic 1.1. System analysis of laser surface treatment of materials. Purpose and objectives of the course. Basic terms and definitions.
Topic 1.2. Energy and space-time characteristics of the laser beam. Energy parameters of laser beams. Power of laser radiation, methods of its determination, devices.

Section 2. Physico-chemical processes in materials under laser irradiation.
Theme 2.1. Absorption of laser radiation by materials. Physical processes in materials, their cause-effect relationships. Absorption of laser radiation by metals and dielectrics.
Topic 2.2. Heat processes in the surface treatment of materials. Calculation of temperature distribution in the zone of laser heating by pulsed radiation.

Section 3. Methods of laser surface treatment of materials.
Topic 3.1. Modification of surface layers of materials by laser irradiation. Features of structural-phase transformations in iron-carbon alloys with laser super-fast heating and cooling. Mechanism of structural-phase transformations. Exclusion of critical points. Influence of heating and cooling rates, carbon content.
Topic 3.2. Laser surface microwaving, surfacing and sintering. Surface laser microwelding, sintering and surfacing.
Topic.3.3. Influence of laser treatment on qualitative and operational characteristics of surface layers of materials. Physical and mechanical properties of materials after laser strengthening.

Section 4. Technological Processes and Equipment for Laser Surface Finishing.
Theme 4.1. Technological processes of laser surface treatment. Flow charts of laser surface processing, thermal hardening, thermal cycling, microalloying, surfacing, coating and sintering using pulsed, repetitively pulsed and continuous-wave radiation.
Topic 4.2. Technological equipment for laser surface treatment.