Induction Forging & Preheating | Delmer Group

Induction Forging & Preheating

Induction preheating provides rapid, controllable heating before forging, hot forming, upsetting, extrusion or other thermal manufacturing operations. Delmer systems can be engineered for billets, bars, sections and components where the required temperature must be reached consistently before the next production step.

Where induction preheating is used

Steel billet and bar preheating before forging.
Stainless-steel hot forming and forging applications.
Copper and brass component heating.
Aluminium preheating for suitable forming processes.
Localized heating before upsetting, forming or joining.
Preheating of industrial components before thermal processing.

Why induction is suited to forging preheating

Induction transfers electrical energy into the workpiece without requiring a combustion flame at the heating zone. The system can be designed around production speed, material, billet dimensions, target temperature and required heating uniformity.

Key engineering inputs

Input	Effect on system design
Material and grade	Determines heating behaviour and target process temperature.
Billet/bar dimensions	Determines coil geometry and heating penetration.
Initial temperature	Changes required energy per piece.
Target temperature	Defines the thermal process window.
Pieces per hour	Determines required production power and duty cycle.
Heating profile	Determines whether the process is continuous, batch or localized.

Induction forging line integration

A production installation may include material loading, induction coils, temperature monitoring, power control, material movement, transfer to the forging press and cooling. The induction generator can be supplied as a standalone system or considered as part of an OEM machine architecture.

Heating uniformity matters

For forging, simply reaching a nominal temperature is not enough. The required temperature distribution through the workpiece and along the heated length must be considered. Coil geometry, operating frequency, power, material movement and heating time all contribute to the final thermal profile.

Delmer application engineering

Delmer evaluates each forging application from actual production data rather than specifying a generator from material name alone. For a preliminary assessment, provide billet diameter or dimensions, material grade, starting temperature, target temperature, required heating time or line speed, pieces per hour and electrical supply.

Related induction heating technology

Read the Delmer Industrial Induction Heating Applications guide for brazing, hardening, annealing, shrink fitting and other applications.

Engineering Focus: Throughput and Temperature Uniformity

Forging systems are sized from material, billet dimensions, starting temperature, target temperature and pieces per hour. Coil geometry, frequency, power and material movement must produce the required temperature distribution before forging.

Frequently Asked Questions

Can induction heat steel before forging?

Yes. Steel preheating before forging is a major industrial application for induction heating.

Can copper and brass be heated by induction?

Yes. Copper, brass and other conductive materials can be heated by induction, with system design adapted to their electrical and thermal characteristics.

Can induction replace a gas-fired billet heater?

It can be a suitable alternative for applications where controllable electrical heating, production rate, localized heating or integration with an automated line provide advantages. The economics depend on the specific process.

How do I size the system?

Provide material, billet dimensions, initial and target temperatures, heating time or line speed and production rate. These inputs determine the required heating duty and system configuration.