The Effect of Carburizing Medium on Carbon Dispersion Layer of ASTM A516 Steel

Abstract:

Carburizing had been a renowned case hardening method for most metal which produced hard casing protecting the surface, resulting in improvement of the mechanical, wear and corrosion behaviour. Carburizing in solid medium offer low cost advantages, thus it is widely implemented. The objective of this study is to compare the carbon thickness layer formed after carburizing process at two different solid medium which is powder and paste form. ASTM A516 Grade 70 mild steel was use as the sample in this study. Carburizing process in both powder and paste medium are conducted at three different temperatures which are 850°C, 900°C and 950°C for 8 hours holding time and cooled in room temperature, for comparison purpose. The thickness layer observation and measurement was carried out using optical microscope and XRD analysis was also conducted to validate the carbon appearances. Rockwell hardness test was also performed before and after carburizing process. The findings from this study indicated that paste carburized samples induced deeper carbon diffusion compared to powder carburized samples. Higher carburizing temperature is also favorable in enhancing the thickness layer in both powder and paste carburized samples. It could be stated that comparable thickness layer could be achieve faster in paste carburized samples, compared to powder carburized samples, which can lead a more cost effective carburizing process.

• Periodical: Applied Mechanics and Materials (Volume 393)
• Pages: 212-216
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.393.212
• Online since: September 2013
• Authors: Siti Khadijah Alias, Bulan Abdullah, Abdul Hakim Abdullah, Syazuan Abdul Latip, Nor Aini Wahab, Muhd Azimin Ab Ghani
• Keywords: Carbon Thickness Layer, Carburizing, Mild Steel

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