MICROSTRUCTURES AND OXIDATION RESISTANCE OF Fe3Al WELD OVERLAY

Acta Metallurgica Sinica (English Letters) ›› 2001, Vol. 14 ›› Issue (4): 253-256 .

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MICROSTRUCTURES AND OXIDATION RESISTANCE OF Fe3Al WELD OVERLAY

X.G.Min, X.Q.Yu, Y.S.Sun

Department of Materials Science and Engineering,Southeast University,Nanjing 210096,China

Received:2001-03-12 Revised:2001-05-23 Online:2001-08-25 Published:2009-10-10
Contact: X.G.Min

Abstract

Abstract: Using the Fe3Al electrode through manual arc surfacing (MAS),Fe3Al coatings havebeen deposited on the stainless steel substrate.The microstructures,hardness andoxidation resistance of the weld overlay have been investigated.The results show thatcrack-free overlays can be obtained when pre-heating of the substrate at 500℃ andpostweld heat treatment at 700℃ were used.Elements of Al,Cr,Ni etc.transferredbetween the substrate and the overlay,but this does not influence the microhardnessof the substrate and the Fe3Al overlay.Oxidation tests show that the Fe3Al overlayshave excellent oxidation resistance in comparison with the stainless steel substrate at800℃ and 900℃.

Key words: Fe3Al, weld overlay, manual arc surfacing (MAS).oxidation resistance

X.G.Min, X.Q.Yu, Y.S.Sun. MICROSTRUCTURES AND OXIDATION RESISTANCE OF Fe3Al WELD OVERLAY[J]. Acta Metallurgica Sinica (English Letters), 2001, 14(4): 253-256 .

[1]	W.L.Xu, Y.S.Sun, S.S.Ding. MICROSTRUCTURE AND TENSILE PROPERTIES OF Fe3Al-BASED ALLOYS WITH VC AND TiC ADDITIONS [J]. Acta Metallurgica Sinica (English Letters), 2001, 14(4): 248-252 .
[2]	X.Q. Yu and Y.S. Sun (Department of Materials Science and Engineering, Southeast University, Nanjing 210096, China). EFFECTS OF COMBINED ADDITIONS OF TUNGSTEN AND MOLYBDENUM ON THE CREEP PROPERLIES OF Fe_3Al-BASED ALLOYS [J]. Acta Metallurgica Sinica (English Letters), 2000, 13(6): 1136-1140.
[3]	SUN Zuqing, MAO Weimin, CHAI Shuyan, YANG Wangyue, HUANG Yuanding(University of Science and Technology Beijing, Beijing 100081. China)RAABED, KEICHELJ(Institut fur Metallkunde und Metallphysik. RWTH Aachen, Germany). TEXTURE AND MECHANICAL PROPERTIES OF WARM ROLLED Fe_3Al BASED ALLOY [J]. Acta Metallurgica Sinica (English Letters), 1995, 8(z1): 369-374.

MICROSTRUCTURES AND OXIDATION RESISTANCE OF Fe3Al WELD OVERLAY

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