MICROSTRUCTURE AND CORROSION WEAR PERFORMANCE OF ALLOY LAYERS OF OXY-ACETYLENE FLAME AND PLASMA ARC SPRAYING WELDING

J Chin Soc Corr Pro

2003, Vol. 23

Issue (5): 307-311 DOI:

Research Report

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MICROSTRUCTURE AND CORROSION WEAR PERFORMANCE OF ALLOY LAYERS OF OXY-ACETYLENE FLAME AND PLASMA ARC SPRAYING WELDING

Xiaomin Yuan;Songhua Si;Yizhu He

安徽工业大学冶金与材料学院

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Xiaomin Yuan; Songhua Si; Yizhu He. MICROSTRUCTURE AND CORROSION WEAR PERFORMANCE OF ALLOY LAYERS OF OXY-ACETYLENE FLAME AND PLASMA ARC SPRAYING WELDING. J Chin Soc Corr Pro, 2003, 23(5): 307-311 .

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Abstract Microstructure,phase constitution,hardness and corr osion wear test of the different corrosion media of Fe-base self-fluxing alloy layers (HFe55 and DFe55) and Ni-base layers(HNi60 and DNi60) by oxy-acetylene f lame and plasma arc had been studied on the 16Mn steel substrate.Results show th at the microstructure of the layers all have characteristic of dendrites,and the layers are consisted of γ dendritic solid solution and fine eutectic structure between the dendrites.The dendrite of Fe-base layers is flourishing,but Ni-bas e layer is finer.The higher the hardness of the layers,the better the corrosion wear resistance of the layers.The order of the hardness and wear resistance from high to low is HNi60,DFe55,DNi60 and HFe55.The corrosion wear resistance of the layers in 4%HCl (pH6) and 4%NaOH (pH8) liquid media is lower than that in water,especially in 4%HCl acid media.

Key words: oxy-acetylene flame spraying welding plasma arc sprayi ng welding microstructure hardness corrosion

Received: 29 July 2002

ZTFLH:

TG174.442

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