Research of Aluminum Silicon Composite Layer on Heat Resistant Steel Grate by Cast-Infiltration Method

Zhen Wang; Hua Shun Yu; Xin Ying Wang; Lei Wang; Zhao Ding Song

doi:10.4028/www.scientific.net/AMR.820.34

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 820Research of Aluminum Silicon Composite Layer on...

Research of Aluminum Silicon Composite Layer on Heat Resistant Steel Grate by Cast-Infiltration Method

Abstract:

In order to improve the high temperature oxidation resistance, 75 Si-Fe and the silver paint were selected as cast-penetrated agent using the cast-infiltration method to form an aluminum silicon composite layer on the heat resistant steel grate surface. The microstructure and hardness properties of cast-infiltration layer were studied by optical microscope (OM), scanning electron microscope (SEM) with electron dispersive spectrum (EDS), and micro hardness test. The results show that the cast-infiltration layer is composed of ferrite and irregular shape of carbide particles. Most of the carbides are (Fe,Cr)₃C and a small amount (Fe,Cr)₇C₃ also observed in composite layer. The highest micro hardness of fine carbide particles reaches 1253 HV. The optimized silicon content is 50wt%, and the thickness of infiltration layer reaches 0.6mm.

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Periodical:

Advanced Materials Research (Volume 820)

Pages:

34-37

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.820.34

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Online since:

September 2013

Authors:

Zhen Wang, Hua Shun Yu, Xin Ying Wang, Lei Wang, Zhao Ding Song

Keywords:

Carbide, Composite Layer, Microhardness

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