Microstructural effects in wear of hardened sintered steels produced by diffusion bonded and prealloyed powders

Autor:	Wolfgang Pahl, P. V. Muterlle, Giovanni Straffelini, A. Molinari
Rok vydání:	2010
Předmět:	Austenite Materials science Metallurgy Metals and Alloys Nucleation Condensed Matter Physics Microstructure Brittleness Mechanics of Materials Martensite Materials Chemistry Ceramics and Composites Hardening (metallurgy) Tempering Composite material Heat treating
Zdroj:	Powder Metallurgy. 53:201-207
ISSN:	1743-2901 0032-5899
DOI:	10.1179/174329009x409732
Popis:	The influence of the microstructure on the wear behaviour of some hardened sintered steels produced with diffusion bonded powders and subjected to through hardening, carburising and sinterhardening was investigated. In dry sliding, wear was oxidative in nature and the localised surface deformation caused delamination, which further reduce the wear resistance. In these conditions, the harder the microstructure, the better the resistance to plastic strain. In lubricated rolling–sliding, wear occurs by rolling contact fatigue. Cracks nucleation was caused by the stress localisation at the pores edges. In this case, a brittle virgin martensite has a negative effect. Tempering reduces martensite brittleness, and makes its resistance to nucleation and propagation of the rolling contact fatigue comparable to that of Fe–Ni austenite.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::22f8fbc006783220c0b717f6a7ddd7a0 https://doi.org/10.1179/174329009x409732 Zobrazit plný text záznamu Plný text ve formátu PDF