Induction Annealing & Stress Relieving | Delmer Group

Induction Annealing & Stress Relieving

Induction annealing and stress relieving provide controlled localized or continuous heating for metal components and products that require a defined thermal treatment. Induction can deliver heat directly into conductive material and can be integrated into continuous production lines.

Delmer systems can be considered for tube and pipe processing, weld-seam treatment, fabricated components, machined parts, wire and other applications where controlled heating and repeatability are important.

Industrial applications

Stress relieving of welded or fabricated steel components.
Annealing or softening of selected metal sections.
Post-weld heat treatment of suitable continuous products.
Tube and pipe heat treatment.
Wire and continuous-process thermal treatment.
Localized treatment before forming, machining or subsequent processing.

Why induction for annealing and stress relieving?

Induction heating can concentrate thermal energy in a defined zone and can be controlled through electrical power, time, movement speed and temperature feedback. This can be valuable when production requires a repeatable thermal cycle rather than broad furnace heating.

System selection factors

Requirement	What Delmer evaluates
Material	Electrical and thermal properties and the required metallurgical treatment.
Product geometry	Diameter, thickness, length and heated-zone dimensions.
Temperature	Required process temperature and allowable thermal variation.
Cycle	Heating time, soak requirements and line speed.
Production	Batch, semi-continuous or continuous operation.

Continuous induction heating

For wire, tube and other continuous products, the induction system can be arranged around a controlled material path. The heating zone, line speed, coil arrangement and cooling strategy are selected together so the thermal process matches production requirements.

Stress relieving versus annealing

These processes should not be treated as interchangeable. The required thermal cycle depends on material, fabrication history and the desired metallurgical result. Delmer recommends specifying the required treatment and temperature profile with the component or production-line details before selecting the generator and inductor.

Engineering Focus: Thermal Cycle

The important specification is the required thermal treatment, not simply heater power. Material grade, target temperature, heating length, residence time, movement speed and allowable variation determine whether localized or continuous induction heating is appropriate.

Frequently Asked Questions

Can induction be used for stress relieving?

Yes, for suitable conductive components and process requirements. The heating profile and temperature control must be designed for the specific material and treatment.

Can induction anneal continuous wire or tube?

Yes. Continuous induction heating is used in suitable production processes where line speed and thermal treatment can be controlled.

Does induction replace a conventional furnace?

Not universally. Induction is particularly attractive for localized, fast or continuous heating; furnace treatment may remain preferable for some large loads or long uniform soak cycles.

What information is required?

Provide material grade, dimensions, target temperature, treatment type, heating length, line speed or batch size and required cycle.