Improvement of Thermal Oxidation Resistance of AISI H13 Steel via Hot-Dipped Aluminizing

Wen Guang Li; Feng Wang; Qiu Yang Zhang; Yin Zhou; Shu Qi Wang

doi:10.4028/www.scientific.net/AMM.778.124

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 778Improvement of Thermal Oxidation Resistance of...

Improvement of Thermal Oxidation Resistance of AISI H13 Steel via Hot-Dipped Aluminizing

Abstract:

The aluminized coating on AISI H13 steel was prepared via hot-dipped aluminizing and subsequent high-temperature diffusion. Isothermal oxidation tests of the aluminized and untreated H13 steel were performed. The results showed that the aluminized coating consisting of FeAl and Fe₃Al was achieved with Kikendall porosity and carbide particles agglomeration. Compared to the untreated steel, the aluminized steel presented an excellent oxidation resistance and its weight gain slightly increased at 650 and 850°C. At 850°C, the untreated H13 steel had a worse oxidation resistance and the weight gain increased linearly with the increase of oxidation time. Al₂O₃ was preferentially formed on unspoiled surface and provided a barrier to obstruct the oxygen into the coating, while Fe₂O₃ formed around cracks had no protection.

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Periodical:

Applied Mechanics and Materials (Volume 778)

Pages:

124-127

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.778.124

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Online since:

July 2015

Authors:

Wen Guang Li, Feng Wang, Qiu Yang Zhang, Yin Zhou, Shu Qi Wang*

Keywords:

Fe-Al Intermetallic, Hot-Dipped Aluminizing, Steel, Thermal Oxidation Resistance

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