engleski

Quenching oil selection based on cooling effects of different oils composition

The quenching oils contain base oil and different types of additives according to application requirements and also safety impact to the workers or environment. High-performance quenching oils must have very high oxidation and thermal resistance, high flash point, low sludge formation and acceptable heat-transfer characteristics. That can be achieve by proper components selection, both base oils and additives. Adequate selection of quenching media decreases the risk of tensile stresses, cracking and workpiece distortion, and imparts cleanliness to metal parts. There are numerous compounds available for formulate quenching oils: as base oil are mineral, synthetic and natural oils, used separately or in combination, as additives are used different rust and oxidation preventives, accelerators, busters and others. Mineral base oils are widely used because of their advantages with respect to stability in comparison to natural oils, or lower prices in comparison to synthetic oils. In this work are presented the results of laboratory investigation of physical and chemical properties of new quenching oils based on several types of mineral oils and proper additives at different treat levels. Cooling characteristics of oils are determined at three temperatures according to ISO 9950 standard.

Heat treatment; quenching oils; cooling characteristics; oil composition; additives

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