Calculation of heating of metals by continuous laser radiation in an oxidizing atmosphere

A study is made of a nonsteady problem of heating of metals by continuous laser radiation allowing for a chemical reaction on the surface of a metal plate. The dependence of the absorptivity of the target on the thickness of the oxide film formed on the metal surface is also allowed for. Approximate analytic expressions are obtained for the dependences of the metal temperature on time and on the oxide film thickness, and also for the time dependence of this thickness during heating. It is shown that it is essential to allow for the nonlinearity of the process in calculation of the heating of metals by laser radiation in oxidizing atmosphere.