Steel 20KhN2M is used for the production of gears and other components, for whose service enhanced wear resistance is required in retaining resistance to bnpact loadings. The deforvnation (warping) and increased brittleness of these components are observed after their bulk hardening. The deformation of the components cannot be completely eliminated, even on hardening with the use of superhigh-frequency radiation. Local laser heating lowers defopvnation to a significant degree, hz this connection, it was interesting to study the effect of laser radiation on the mechanical properties of the indicated components.

The work analyses the main thermal and physical parameters of the material that condition the laser welding process. It is shown that the best quality of the laser welding seam in carbon-rich and highly doped steels is obtained when the seam is formed from the covering layer of the powder mixture deposited on the surface of the welded parts. It should be noted that, when the laser technology is used to weld the parts from copper or aluminium, the welding process can be carried out in the atmosphere of CO2 gas.

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