This article, with the aid of illustrations and curves, describes an experiment used to understand the cooling characteristics and transformation behavior of steel wires during patenting. The two aqueous polymer quenchants used as alternatives for lead baths, are carboxymethyl cellulose and polyvinyl alcohol. A small amount of polymer additive in spraying could modify the physical properties of the spray medium and improve atomizing status. The concentration-fog flux effect further improves the flexibility of spraying and makes it easier to control the cooling process.