Abstract
1. Preliminary heat treatment of the wire rod provides an improvement in the combination of mechanical properties of the wire which it acquires after high-temperature thermomechanical working and in the service properties of the springs. 2. In preparation of the structure of the steel for high-temperature thermomechanical working it is necessary to create a uniform ferritic-pearlitic structure with lamellar or rodshaped carbide particles 0.01–0.05 μm thick. 3. For 51KhFA steel the highest combination of properties after high-temperature thermomechanical working is obtained with the use of normalizing with heating in a salt bath and also of patenting with subsequent tempering at the patenting temperature as the preliminary heat treatment. 4. Cold deformation after preliminary heat treatment does not have a significant influence on the properties of high-temperature thermomechanically worked wire.
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