振动助渗制备45钢表面铝化物涂层及其抗高温氧化性能

doi:10.11896/j.issn.1005-023X.2018.16.030

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Abstract In order to reduce the aluminizing temperature to refine grain and improve the high-temperature oxidation resistance of 45 steel surface, nanostructured aluminide coating was prepared on the surface by vibration assisted infiltration. The phase composition of the coating was analyzed by X-ray diffractometer. The microstructure of the coating was observed by scanning electron microscopy and atomic force microscopy. The chemical composition of the coating was analyzed by energy dispersive spectrometer. The bond strength between coating and substrate was measured by scratch tester. The results show that the aluminide coating is mainly composed of η-Fe₂Al₅ and a small amount of θ-FeAl₃ phases, and having single, dense and uniform characteristics. At 120 min, the surface of the aluminide coating formed by vibration assisted infiltration has two typical nanostructure regions of pits and hills, the longer the distance from the surface, the larger the nanocrystalline of the coating. When the load is perpendicular to 68 N, the noise signal appears, and the coating is damaged. The oxidation weight gain and spalling capacity of the coating in the oxidation resistance test are only 1/60 and 1/160 of the 45 steel sample treated with the less surface coating, that is, the aluminide coating remarkably enhances the ability of the 45 steel surface to resist high temperature oxidation.

Key words： 45 steel vibration assisted infiltration aluminide coating high-temperature oxidation resistance

Published: 18 September 2018

CLC number:

TG174

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	Articles by authors
	MENG Kun
	ZHAN Zhaolin
	WANG Yuan
	WANG Wei
	YU Xiaohua
	RONG Ju

Cite this article:

MENG Kun,ZHAN Zhaolin,WANG Yuan, et al. Preparation of Aluminide Coating on 45 Steel by Vibration Assisted Infiltration and Its High-temperature Oxidation Resistance[J]. Materials Reports, 2018, 32(16): 2865-2869.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.16.030 OR http://www.mater-rep.com/EN/Y2018/V32/I16/2865

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