Heat treatment process for high-carbon steel wires for wire ropes

The invention discloses a heat treatment process for high-carbon steel wires for wire ropes. In the process, high-carbon steel wires, the diameter of which is 2mm to 5mm, are heated to the temperature of 780 DEG C to 900 DEG C by way of induction heating, resistance furnace heating or electric contact heating, moreover, the heated steel wires are kept under the temperature of 780 DEG C to 900 DEG C for 10 seconds to 2 minutes, then quickly put into a salt bath and kept under constant temperature in salt bath lower than sorbitizing temperature for 1 to 20 seconds, the steel wires are then put into salt bath or lead bath within the sorbitizing temperature range, kept under constant temperature for 20 seconds to 1 minute and then taken out to be naturally cooled, and therefore the high-carbon steel wire-sorbitizing heat treatment process is fulfilled. According to the process, the sorbite group size and interlayer spacing of the steel wires can be effectively refined and the uniformity of interlayer spacing can be improved, and the product has the advantages of high plastic strength, excellent fatigue resistance, long service life and the like. The process plays a significant role in enhancing the plastic strength and fatigue lives of steel wires.