Quenching oil and heat treatment fluids are designed for rapid or controlled cooling of steel or other metals as part of a hardening, tempering or other heat-treating process. … Oil has a major advantage over water due to its higher boiling range.
Quenching oil and heat treatment fluids are designed for rapid or controlled cooling of steel or other metals as part of a hardening, tempering or other heat-treating process. Quenching oil serves two primary functions. It facilitates hardening of steel 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.
Oil has a major advantage over water due to its higher boiling range. A typical oil has a boiling range between 450ºF (230ºC) and 900ºF (480ºC). This causes the slower convective cooling stage to start sooner, enabling the release of transformation stresses which is the major problem with rapid water cooling. Oil is, therefore, able to quench intricate shapes and high-hardenability alloys successfully.
These higher quench media temperatures allow for more uniform and slower cooling of parts as they are quenched. It also allows for the transformations that occur during hardening to take place more uniformly as the surface and core of a part are transformed at the same time rather than allowing thin sections or surfaces to transform prior to thicker sections or the core which cool slower.
Marquenching is often employed to harden thin, long shafts or thin stampings to keep these parts straighter or flatter than what would be possible in a conventional cold oil quench.
Quenching oils and heat treatment fluids can include a number of additional features which add versatility and functionality. Among these are biodegradable, low foaming, and water displacement characteristics.
- Biodegradable – fluids are designed or suitable to decompose or break down into harmless chemicals when released into the environment. This is useful for high volume operations where disposal costs for degraded oils could otherwise be very high.
- Low foaming – fluids do not produce foam or produce only small amounts of foam. Non-foaming characteristics are achieved through the use of additives that break out entrained air. Leaks which introduce air into a system can cause pump damage due to cavitation. Foaming can also reduce the cooling ability and the bulk modulus (or stiffness) of the fluid.
- Water displacement – fluids have the ability to displace water from a surface based on wetting or surface energy characteristics. Fluids with low surface energy or interfacial tension compared to water will flow under the water or moisture on a surface.
We provide both range of Cold quenching and Marquenching fluids with the best quality.