A new way to produce aluminised layer on austenitic refractory steel by electrolytic activated flux technique. (28th April 2008)

• Record Type: Journal Article
• Authors: Luo, Xinmin; Xu, Yong; Chen, Kangmin
• Is Part Of: International journal of material & product technology. Volume 31:Number 2/4(2008)
• Page Start: 314
• Page End: 325
• Publication Date: 2008-04-28
• Subjects: austenite -- chromium -- refractory steel -- electric radiant tubes -- anti-carburising -- electrolytic activated flux -- coating -- hot-dip -- aluminising -- diffusion -- diffused layers; Manufacturing processes -- Periodicals; Materials -- Testing -- Periodicals; 620.11
• Languages: English
• ISSNs: 0268-1900

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.