Abstract
Laser surface treatment of Fe-1, 2, 5, 10, 14 and 19%Cr alloys was accomplished by CO 2 gas laser. High temperature oxidation behavior of laser treated alloys was investigated in HCl-containing atmosphere by thermogravimetric technique. Mass change of Fe-Cr alloys in 1%HC1-50%O 2-N 2 atmosphere at the temperature range from 1073–1273 K was effectively reduced by laser treatment. The effectivity of this treatment was most significant in case of Fe-14%Cr alloy. From analyses of the scales formed in the initial stage and in the later stage, the mechanism of improvement in oxidation resistance in 1%HCl atmosphere was discussed.
Published Version
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