UCON™ Quenchant RL is a nonflammable polymeric quenchants manufactured by The Dow Chemical Company.
It is an aqueous solution of a liquid organic polymer and a corrosion inhibitor. The organic polymer is soluble in water and produces a homogenous solution. At temperatures above 165°F (74°C), however, the polymer separates from water as an insoluble phase.
Analogous quenching performance is obtained with UCON Quenchant RL. When hot metal is quenched in a diluted solution of UCON Quenchant RL, a film of the liquid organic polymer is deposited on the surface of the hot metal.
The rate at which the metal is cooled is governed, in part, by the thickness of the polymer-rich film. The thickness of this film is controlled by the concentration of UCON Quenchant RL in the quench bath.
The cooling rate is controlled also by adjusting the quench bath temperature and/or the rate of agitation.
The major difference between UCON Quenchant RL and the other UCON Quenchants is the polymer composition, which provides uniform heat transfer in a broad range of applications.
• Classified as “FM Approved” as tested against the latest testing criteria
• The optimum operating conditions for a specific metal or part may be determined by control of concentration, bath temperature, and/or agitation
• Minimize replacement control due to its low deterioration and/or oxidation rate. The major make-up requirement is for water lost by evaporation
• Eliminates the smoke, soot, and residues common to oil quenchants. Equipment maintenance and plant cleanliness are easier to achieve
• Fully soluble in water and resistant to bacterial growth • Will not be affected in any way by freezing/thawing
UCON Quenchant RL and RL-NN are suitable for:
• Quenching medium- to high-carbon steel and alloy steels of most grades including 300 and 400 series stainless steels
• Induction hardening, camshafts, and other pieces of intricate geometry and different metallurgy
• May follow oxidizing, neutral, or protective atmosphere furnaces of shaker, rotary, batch or continuous design. The quenchant may be used for direct quenching from the forge, for continuous cast quenching, and for general hardening of forged and cast steels and cast irons
• Large alloy parts from tilt-top, car-bottom and pit furnaces
• Forged parts that are quenched directly from the forge
• Sensitive alloys and shapes heated by induction
• Parts processed from continuous and batch-furnace operations employing gas-fired, neutral, and carburizing-carbonitriding atmospheres