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Microstructure and corrosion behaviour of plasma-nitrocarburized sintered steel

✍ Scribed by P. C. Borges; A. E. Martinelli; C. V. Franco

Publisher
John Wiley and Sons
Year
2004
Tongue
German
Weight
476 KB
Volume
55
Category
Article
ISSN
0947-5117

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✦ Synopsis

Abstract

Powder characteristics and manufacturing processes determine the microstructure, and therefore, the physical, chemical, and mechanical properties of sintered steels. In particular, porosity and corrosion resistance are intimately related, since the contact area between substrate and electrolyte significantly affects the corrosion resistance of sintered steels. This study addresses the effect of powder characteristics and pressing parameters on the microstructure and corrosion resistance of low‐carbon sintered and sintered/plasma‐nitrocarburized steel. The results indicated that the corrosion resistance increased with increasing density and decreasing specific surface area. Additionally, plasma‐nitrocarburizing was highly effective in coating open pores of the material.

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