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The experimental work concerned the development of new classes of low- and medium-carbon steels capable of ensuring an optimum combination of wear resistance and toughness. The criterion adopted for selection of the steels was that of obtaining dual-phase structures (of the F+MA, B+MA or M+A types) which appeared interesting from the wear-resistance aspect. Attention was thus focused on low- and medium-carbon steels (0.1-0.25%) with the addition of elements such as Cr, Mo, V, Si and B for the control of hardenability. The results of the experimentation reveal that dual-phase structures at the as-rolled stage can guarantee good levels of wear resistance. In particular, whatever the distribution of the commonest phases (ferrite or bainite), wear-resistance improves (for the same hardness) with increase in the MA phase. This holds good for the C1 control-rolled steels and for the C2 steels air-cooled after rolling. Where the latter are concerned, it has been ascertained that the best wear-resistance is obtained with completely bainitic structures associated with MA volume fractions in the order of 15%, hardness being between 320 and 350 HV30.

Additional information

Authors: FRANZONI U, Centro Sviluppo Materiali S.p.A., Roma (IT);SCACCIA A, Centro Sviluppo Materiali S.p.A., Roma (IT)
Bibliographic Reference: EUR 12497 IT (1990) 75 pp., FS, ECU 8.75
Availability: (2)
ISBN: ISBN 92-826-1191-4
Record Number: 199010523 / Last updated on: 1994-12-01
Original language: it
Available languages: it