high-alloy steel hot rolling induction heating machine

1. Rapid heating, low thermal inertia, and quick start-stop response

Internal vortex heating eliminates the need for furnace insulation, allowing instant use upon activation. It is suitable for intermittent production in rolling mills, reducing standby energy consumption. High-alloy steels exhibit poor thermal conductivity, necessitating multi-zone and segmented temperature control to avoid excessive core-to-surface temperature differences.

2. High temperature control accuracy and excellent temperature uniformity

Multi-zone independent power + infrared closed-loop temperature control, with minimal temperature difference at the head and tail of the billet, ensuring stable ±5~±10°C; suitable for high-alloy steels (H13, bearing steel, heat-resistant steel, etc.), guaranteeing consistent rolling structure and reducing risks of mixed grains, overheating, and overburning.

3. Light oxidation and decarburization, high material yield

The heating time is short, and the oxidation loss is significantly lower than that of gas furnaces (0.3% to 0.8% loss). It can be equipped with a protective atmosphere to mitigate issues such as decarburization and alloy element depletion in high-alloy steels.

4. Modular and highly adaptable, compatible with multiple specifications

Medium-frequency IGBT power supply, independent induction coil module, with switchable frequency matching different billet diameters; quick specification change, suitable for multi-variety, small-batch high-end alloy steel bar and round billet hot rolling lines.

5. Energy-saving and environmentally friendly, automation-friendly

No combustion flue gas or NOₓ emissions; direct electrical heating with higher thermal efficiency than gas furnaces; easy integration with feeding, temperature measurement, and rolling mills, achieving full automation and traceability.

6. Non-contact heating, compact equipment structure

High-temperature refractory masonry without water cooling occupies less space; water-cooled induction coils and non-magnetic guide rolls are suitable for continuous feeding and rolling conditions

1. IGBT intermediate frequency power supply: multi zone independent power, frequency matching as needed (small billet high frequency, large billet intermediate frequency, generally 2.5-15kHz), with separate closed-loop adjustment for each zone

2. Modular induction coil: multi-stage series partitioned heating (preheating section, Curie point slow heating section, final heating section), coil copper tube water cooling, gradually changing turn pitch; Non magnetic water-cooled guide roller for conveying raw materials

3. Infrared temperature measurement system: multi-point infrared temperature measurement, real-time acquisition of head, tail, and surface, PLC closed-loop temperature control, temperature control accuracy of ± 5~± 10 ℃

4. Closed loop water-cooled unit: cooling power supply, capacitor, coil, essential for continuous production

5. Roller conveyor+speed control system: uniform feed, feed speed and power linkage, control heating slope

6. SCADA industrial control system: stores process curves by brand, prevents overheating, overburning, mixed crystal, and hot cracking, and can be connected to rolling mill interlocking

-After arrival, on-site installation, wiring, and water debugging will be carried out until the induction heating production line stabilizes and produces qualified workpieces (hardness, metallography, and elongation meet the standards)

-Free training for operators and electricians: equipment start stop, tuning parameter adjustment, sensor replacement, cooling system maintenance, daily inspection, simple troubleshooting

-Delivery of complete set of materials: electrical schematic diagram, spare parts list, operation manual, reference table for quenching and tempering process.