Wear behavior of cryogenically treated AISI 420 martensitic stainless steel
- Autores: G. Prieto, W.R. Tuckart
- Localización: Proceedings of the VIII Iberian Conference on Tribology: Conference proceedings / Ana Eva Jiménez Ballesta (aut.), Tulia Espinosa Rodríguez (aut.), Noelia Saurín Serrano (aut.), Joaquín Arias Pardilla (aut.), María Dolores Bermúdez Olivares (aut.), 2015, ISBN 978-84-606-8904-1, págs. 65-71
- Idioma: inglés
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Resumen
Cryogenic treatments have been employed over the last three decades in both tool and high-alloy steels to improve wear resistance, mainly through the transformation of retained austenite and the precipitation of fine carbides. In this work the wear behavior of deep cryogenically treated (DCT), low-carbon AISI 420 martensitic stainless steel specimens has been studied with respect to that of conventionally heat treated (CHT) ones. The tribological properties of the materials were assessed by means of ball-on-disk tests, under a range of applied normal loads in a paraffinic aditive-free vaseline bath. The disks were made of AISI 420 stainless steel subjected to two different heat treatments, namely, quenched and annealed (CHT), and quenched, soaked in liquid nitrogen for 2 h and annealed (DCT). A 5 mm tungsten carbide ball was used as the counterbody. Wear behavior has been characterized by wear volume, friction coefficient measurements and analyses of worn surfaces, wear debris ...
