Effect of composition on oil quenchant performance

Matijević, Božidar and Župan, Josip and Pedišić, Ljiljana (2012) Effect of composition on oil quenchant performance. = Effect of composition on oil quenchant performance. International Heat Treatment and Surface Engineering, 6 (1). pp. 15-18. ISSN 1749-5148. Vrsta rada: ["eprint_fieldopt_article_type_article" not defined]. . Točan broj autora: 3.

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Official URL: http://www.tandfonline.com/doi/abs/10.1179/1749514...


Quenching is the most common method of hardening metals and involves continuous cooling from a given austenitising temperature to achieve full transformation into a martensitic structure. The cooling rate depends mainly on the thermal characteristics of the metal, the section thickness of the workpieces and the heat removal properties of the quenching medium. Oils, when used as quenching media contain a base oil and different types of additives according to the application requirements. As the base oil, it is possible to use mineral, synthetic and natural oils, either separately or in combination. Mineral base oils are widely used because of their advantages in stability in comparison with natural oils, or lower price in comparison with synthetic oils. There are numerous additives available for use but, besides functional properties, the environmental and safety requirements have to be considered in their selection, e.g. barium additives must be replaced with less harmful compounds. Additionally, petroleum derivatives should be replaced by renewable base stocks that are biodegradable, which is a general trend in lubricant development. By changing the composition of the base oils and additives, heat transfer characteristics are also changed. This study presents the results of the analysis of physical and chemical properties, as well as of cooling characteristics of new quenching oils with different compositions. Cooling curves have been evaluated according to ISO 9950 standard. © 2012 IHTSE Partnership Published by Maney on behalf of the Partnership.

Item Type: Article (["eprint_fieldopt_article_type_article" not defined])
Keywords (Croatian): Application requirements; As quenching; Base oil; Base stock; Continuous cooling; Cooling characteristics; Cooling curve; Cooling rates; Functional properties; General trends; Hardening metals; Harmful compounds; Heat removal; Heat transfer characteristics; Martensitic structures; Mineral base oil; Natural oil; Oils; Physical and chemical properties; Quenchants; Quenching medium; Quenching Oil; Safety requirements; Section thickness; Synthetic oil; Thermal characteristics; Work pieces; Barium; Chemical properties; Cooling; Hardening; Heat treatment; Martensitic transformations; Phase diagrams; Quenching
Divisions: 1000 Department of Materials > 1010 Chair of Materials and Tribology
1000 Department of Materials > 1020 Chair of Heat Treatment and Surface Engineering
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 27 Apr 2015 10:45
Last Modified: 16 Mar 2016 11:00
URI: http://repozitorij.fsb.hr/id/eprint/3969

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