Abstract
AbstractSolutions of high molecular‐weight polymers, particularly polyoxyalkylene glycols (PAGs), are used widely in the heat treatment of metals known as ‘quenching’. This is mainly because of the non‐flammable nature of the polymer solution, compared with safety hazards associated with traditional mineral‐oil based quenchants. However, the use of PAG‐based quenchants for some heat treatment processes, particularly for slow cooling speeds, has been limited. This paper describes how, through an understanding of the quenching mechanism, the quench speed of PAG‐based quenchants can be slowed by the use of additives or controlling the conditions of operation. The paper also gives an overview of the experimental measurement of polymer quenching and the factors involved in quenching.
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