Sub-zero Treatment of P/M Vanadis 6 Ledeburitic Tool Steel
Journal Title: Materials Engineering - Materialove inzinierstvo (MEMI) - Year 2013, Vol 20, Issue 3
Abstract
The Cr-V ledeburitic steel Vanadis 6 was vacuum austenitized at different temperatures, nitrogen gas quenched and double tempered at 530 °C for 2 h. For the selected samples, a sub-zero period was inserted between quenching and tempering. The obtained results infer that: I) as-quenched microstructure consisted of martensite, retained austenite and undissolved carbides, II) sub-zero processing reduced the amount of the retained austenite and increased the tetragonality of the martensitic lattice, III) as-quenched hardness of the steel was higher by 2 – 3 HRC due to sub-zero processing, IV) as-tempered hardness increased with increasing austenitizing temperature but it decreased slightly with the sub-zero period, V) no negative impact of sub-zero processing on toughness was recorded, VI) wear resistance increased with sub-zero period when 100Cr6 steel has been used as a counterpart.
Authors and Affiliations
Peter Jurčí, Jana Sobotová, Petra Salabová, Otakar Prikner, Borivoj Šuštarsič, Darja Jenko
Keywords
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