A new way to produce aluminised layer on austenitic refractory steel by electrolytic activated flux technique
by Xinmin Luo, Yong Xu, Kangmin Chen
International Journal of Materials and Product Technology (IJMPT), Vol. 31, No. 2/3/4, 2008

Abstract: An aluminum diffuse-alloyed layer on the austenitic refractory steel Cr₃₀Ni₂₀NRE designed for electric radiant tubes was investigated. A thin pre-coated layer was first formed on the steel's surface with the electrolytic activated flux technique. Thereafter, the austenitic steel was hot-dipped in the aluminum bath at 730°C for 5 min, and then diffuse treated at 960°C for 6 hours in an atmosphere containing NH₄Cl plus CeO₂. Finally, a dense diffused layer that had a good metallurgical combination with the steel substrate, accompanied by numbers of homogenously dispersed particle phase containing Cr and Si, was observed.

Online publication date: Sun, 27-Apr-2008

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