Quenching Oil

Quenching oil designed for rapid or controlled cooling of steels or metals as part of hardening, tempering or other heat-treatment process. Quenching oil serves two primary functions. It facilitates hardening of steels by controlling heat transfer during quenching and it enhances wetting of steel during quenching to minimize the formation of undesirable thermal and transformational gradients which may lead to increased distortion and cracking.

Quenching oils has a major advantage of a higher boiling range of 230°C to 480°C. This causes the slower corrective cooling stage to start sooner, enabling the release of transformation stresses which is the major problem with water cooling. Oil is, therefore, able to quench intricate shapes and high hardenability alloys successfully.