Journal
METALS
Volume 11, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/met11030412
Keywords
active screen; plasma nitriding; mechanical property; spheroidal graphite cast iron
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Spheroidal graphite cast iron after ASPN treatment shows improvements in hardness, abrasion resistance, fatigue strength, and corrosion resistance. Longer treatment time results in more significant enhancements in performance.
Spheroidal graphite cast iron is a material with a wide range of uses such as in automobile parts. By applying active screen plasma nitriding (ASPN) treatment, the use of spheroidal graphite cast iron is expanded, and it can be expected to be used under special load conditions. In this study, we evaluated the effect of ASPN treatment on the mechanical properties of spheroidal graphite cast iron. With ASPN treatment, a nitride layer was formed on the sample surface and a diffusion layer was formed further inside the nitride layer. The thickness of nitride layer increased as the treatment temperature increased. The hardness was improved by ASPN treatment. The abrasion resistance was improved by ASPN treatment, and longer treatment time resulted in higher abrasion resistance. The fatigue strength was improved by ASPN treatment, and longer treatment time resulted in higher fatigue strength. ASPN treatment also improved the corrosion resistance.
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