Research on the Treatments at Sub-Zero Temperatures of the Sintered Steels and Hardened in Oil

Abstract:

The treatments of the hardened parts at low temperatures have like main goal the reducing of the amount of retained austenite through its transformation to martensite under the action of the strong contractions which occur in cryogenic environments. In the case of sintered steels such researches were achieved on a small scale. The paper presents results of research regarding the cooling in medium of dry ice and respectively of liquid nitrogen, for the three groups of sintered steels with structural carbon content of 0.54%, 0.75% and 0.92% sintered at 1150°C for 60 min and oil quenched.

• Periodical: Advanced Engineering Forum (Volume 13)
• Pages: 97-102
• DOI: https://doi.org/10.4028/www.scientific.net/AEF.13.97
• Online since: June 2015
• Authors: Sandu Dubovan*, Traian Valeriu Popescu, Lidia Dubovan
• Keywords: Cryo Treatment, Powder metallurgy, Sintered Steel, Sub-Zero Treatment

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