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The features of the formation of the microstructure of characteristic surface layers of remelted metal and the heat-affected zone during laser treatment of the main groups of metals are analyzed: technical iron, carbon unalloyed steels, alloyed steels, cast irons, titanium alloys, aluminum alloys, copper alloys. For each group of metals, graphs are provided and the distribution of microhardness by depth in the initial state, after initial normalization or hardening and subsequent laser treatment at different modes, is analyzed. The mechanisms for increasing the microhardness of metals after surface laser treatment are revealed. The directions for controlling the microstructure, microhardness, and their distribution in the surface layer by adjusting the energy density and the speed of laser radiation movement are shown.

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Structural-Phase Transformations in Surface Layers During Laser Treatment

  • 章节

  • 发表日期：

    2026年

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  • Igor Krivtsun,
  • Leonid Golovko,
  • Serhii Fomichov,
  • Oleksii Kaglyak,
  • Yevgenia Chvertko

摘要

The features of the formation of the microstructure of characteristic surface layers of remelted metal and the heat-affected zone during laser treatment of the main groups of metals are analyzed: technical iron, carbon unalloyed steels, alloyed steels, cast irons, titanium alloys, aluminum alloys, copper alloys. For each group of metals, graphs are provided and the distribution of microhardness by depth in the initial state, after initial normalization or hardening and subsequent laser treatment at different modes, is analyzed. The mechanisms for increasing the microhardness of metals after surface laser treatment are revealed. The directions for controlling the microstructure, microhardness, and their distribution in the surface layer by adjusting the energy density and the speed of laser radiation movement are shown.