SURFACE HARDENING AND STRUCTURAL-PHASE STATE OF STAINLESS AUSTENITIC STEELS 12Х18Н10Т AND 08Х18Н9 AFTER HEAT TREATMENT AND SPRAYING OF A COATING

The features of the structural-phase state and changes in the surface properties of stainless steels 12Kh18N10T and 08Kh18N9 after heat treatment, rolling, and coating deposition have been investigated. The application of a treatment method involving aluminum spraying followed by annealing at 700 ℃ (1 h) with slow heating (250 ℃/h) to the target temperature made it possible to significantly increase the microhardness and wear resistance of the surface of 12Kh18N10T steel. The substantial improvement in microhardness and wear resistance after such treatment is attributed to the formation of a new ordered Fe₃Al phase with an FCC lattice.

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