E. Gemelli et al., THERMAL-OXIDATION RESISTANT SURFACE ALLOY S PREPARED BY LASER ALLOYING ON THE FERRITIC STEEL Z38CDV5, Revue de métallurgie, 93(2), 1996, pp. 261
Superficial silicon introduction using laser treatment after predeposi
t of Si or Si3N4 gives to a weakly alloyed ferritic steel an excellent
resistance to oxidation in isothermal or cyclical conditions. The pre
sence of silicon makes the formation of a protective layer of Cr2O3 po
ssible even when the chromium content would not allow it in the absenc
e of silicon.