Structural Upgrade of Rebar Induction Heat Treatment Furnace

Recently, a comprehensive structural upgrade has been completed for the Rebar induction heat treatment furnace dedicated to steel bar quenching and tempering production lines. Focusing on structural defects of traditional furnaces such as poor thermal insulation, uneven magnetic field distribution and inconvenient maintenance, this upgrade optimizes the furnace lining, induction coil, supporting frame and cooling circulation structure. It effectively solves common pain points including large heat loss, heavy oxidation scale and unstable rebar mechanical properties, greatly improving overall production efficiency and energy-saving level.

The induction heating core structure is optimized synchronously. The furnace is equipped with upgraded oxygen-free copper integral coils and closed magnetic yoke components. The optimized coil layout balances electromagnetic permeability, forming a uniform magnetic induction loop around the rebar. It eliminates the temperature difference between the surface and core of steel bars, realizing cross-section temperature difference ≤±8℃. Meanwhile, the anti-flashover structure is added to the coil fixing frame to reduce equipment failure rate and extend coil service life.

After structural upgrading, the equipment thermal efficiency reaches over 93%, with the oxidation scale rate reduced to less than 0.7%. The tensile strength and hardness consistency of finished rebars are significantly improved, fully meeting the standard requirements of high-strength construction steel bars. This structural upgrade provides a reliable high-efficiency and low-consumption heating solution for the rebar heat treatment industry, laying a solid foundation for intelligent and green upgrading of steel thermal processing production lines.