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Titolo:
CONDITIONS PREVAILING IN THE CARBURISING PROCESS AND THEIR EFFECT ON THE FATIGUE PROPERTIES OF CARBURIZED GEARS
Autore:
WILKS TP; CAVALLARO GP; SUBRAMANIAN C; STRAFFORD KN; FRENCH P; ALLISON JE;
Indirizzi:
BIRRANA ENGN ADELAIDE AUSTRALIA
Titolo Testata:
Journal of materials processing technology
fascicolo: 1-2, volume: 40, anno: 1994,
pagine: 111 - 125
SICI:
0924-0136(1994)40:1-2<111:CPITCP>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
STEEL; FRACTURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
T.P. Wilks et al., "CONDITIONS PREVAILING IN THE CARBURISING PROCESS AND THEIR EFFECT ON THE FATIGUE PROPERTIES OF CARBURIZED GEARS", Journal of materials processing technology, 40(1-2), 1994, pp. 111-125

Abstract

Gears used in power transmission in mining equipment are subject to severe operating conditions. The performance limits of the gears are influenced by material selection, choice of forming processes, heat treatment, surface treatment and surface finish. Carburised steels are used widely for gears which undergo cyclic loading (fatigue). In this paper, three steels, viz., EN39B steel, steel X and steel Y, were treateddifferently (heat and surface treatments) and evaluated in a single-tooth bending test rig. Fractographic observation, using optical and scanning electron microscopes, showed that inclusion-initiated fatigue cracks initially grew in transgranular mode, reaching a critical size before rapid fracture occurred through the carburised case in a brittlemanner, resulting in mixed intergranular/transgranular cracking. In EN39B and steel X, fatigue cracks were observed to have initiated from sub-surface MnS inclusions whereas cracks in steel Y were sub-surface initiated. Subsequent failure of the core material occurred in a ductile mode. An important outcome of this study is that a cheaper steel (steel Y) with a combination of treatments (carburising and glass-bead peening) has out-performed the other two steels. The results are presented and discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 10:01:31