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Study on FeAl Intermetallics-Lined Steel Pipe Produced by SHS Centrifugal Process

GAO Feng,GUO Zhi-meng(School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)  
The FeAl intermetallics-lined steel pipe was prepared by SHS centrifugal process.Through thermodynamics calculation,the conditions of Fe-Al intermetallic formation by the thermite reaction were studied.The phase composition of the inner liner and the microstructure of the coating were analyzed by using X-ray diffraction and scanning electron microscopy(SEM)as well as energy dispersion spectroscopy(EDS);the coating hardness was measured using microhardness tester.The result indicated that the coating,composed of FeAl,has a metallurgical bonds very well to the substrate,and its microhardness is 590 HV,2.8 times more than that of the substrate.
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