Aqueous agent for quenching ferrous alloy based on high-viscosity oxyalkylene glycol

摘要

An aqueous agent for quenching components of ferrous alloys, in particular carbon steels and alloy or slightly alloyed steels, which makes it possible to achieve substantially homogeneous hardness throughout the thickness of the quenched components, while providing a transition temperature theta 2 between nucleate boiling and convection, that is at least equal to 260 K, comprises from 0.5 to 20% by weight of a polyoxyalkylene glycol ether having a viscosity at 20 DEG C that is at least equal to 100,000 and preferably at least equal to 150,000 mPa.s. It is also possible to introduce various additives and in particular borax, in a concentration of from 0.2 to 5% by weight. In many cases, the aqueous agent may replace quenching oils.