Carburizing is one of the leading surface-hardening processes for improving wear and fatigue resistance while still maintaining tough and shock resistant cores through surface carbon enrichment of low-carbon steel parts. Of the different carburizing media available, liquid carburizing is not recommended in P/M applications because of salt entrapment in the pores. While gas carburizing is more practical than pack carburizing, plasma treatments are becoming more common because of better treatment control, leading to better performance. In previous studies, we have shown the viability of treatments such as nitriding, nitrocarburizing and carburizing, when applied with suitable parameters to Ni, Mo and Mn alloyed P/M steels of sinter-hardening capability. In the present work, the effects of gaseous and plasma carburizing treatments performed in industrial furnaces on carbon free samples have been studied in order to establish the most suitable treatment cycles and to verify the depth of the carbon penetration. Case depth and microstructure have been characterized by metallographical, physical and chemical analysis.

Carbon and nitrogen diffusion in Ni, Mo, Mn alloyed P/M steels subjected to gaseous and plasma case-hardening treatments / Rosso, Mario; Scavino, Giorgio; G., Lesprance; B. D., Hong; A., DE REGE; P., Miele. - In: ADVANCES IN POWDER METALLURGY & PARTICULATE MATERIALS. - ISSN 1546-7724. - 1:(1997), pp. 6-9. ((Intervento presentato al convegno 1997 International Conference on Powder Metallurgy and Particulate Materials tenutosi a Chicago, IL, (USA) nel 29 June-2 July 1997.

Carbon and nitrogen diffusion in Ni, Mo, Mn alloyed P/M steels subjected to gaseous and plasma case-hardening treatments

ROSSO, MARIO;SCAVINO, Giorgio;
1997

Abstract

Carburizing is one of the leading surface-hardening processes for improving wear and fatigue resistance while still maintaining tough and shock resistant cores through surface carbon enrichment of low-carbon steel parts. Of the different carburizing media available, liquid carburizing is not recommended in P/M applications because of salt entrapment in the pores. While gas carburizing is more practical than pack carburizing, plasma treatments are becoming more common because of better treatment control, leading to better performance. In previous studies, we have shown the viability of treatments such as nitriding, nitrocarburizing and carburizing, when applied with suitable parameters to Ni, Mo and Mn alloyed P/M steels of sinter-hardening capability. In the present work, the effects of gaseous and plasma carburizing treatments performed in industrial furnaces on carbon free samples have been studied in order to establish the most suitable treatment cycles and to verify the depth of the carbon penetration. Case depth and microstructure have been characterized by metallographical, physical and chemical analysis.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11583/1656449
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