Determination of temperature of steel 45 subjected to neodymium glass laser pulses

Surface hardening was used to determine the temperature of the surface of a steel 45 sample with a roughness of 1.2 μ in a region irradiated with pulses from a glass neodymium laser (λ = 1.06 μ, τ_i = 2 msec, E_i = 1.5 J). Calculations were made allowing for a delay Δτ_t, during which the temperature reached its maximum value at a depth z>0.