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Induction Forging

Forging Metals with Induction

Improve your forging process without flame! Induction heating for forging focuses energy in your part only. You don't need a torch or a costly batch or furnace process. Forge your materials in a repeatable, precise flameless process. Forging  the oldest means of metalworking  includes methods of plastically deforming a metal by hammering, sometimes resulting in a stronger workpiece. Most often, a hot-forming process is used in which the temperature of the workpiece is elevated in an oven, by direct flame or by induction. Open-die forging usually involves striking the workpiece with a hammer against an anvil: good for short-run or single-piece work. In impression-die (or closed-die) forging, the workpiece is compressed between two die halves, such that the metal is deformed in the cavity between them. Forged pieces have outstanding grain structure and the best combination of mechanical properties.

Modern induction heating provides reliable, repeatable, non-contact and energy-efficient heat in a minimal amount of time. Solid state induction heaters are capable of heating very small areas within precise production tolerances, without disturbing individual metallurgical characteristics. Ambrell has offered cutting-edge induction forging solutions since 1986.

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Forging is a process where metal is formed into shape using pressure applied by an impact hammer or press. It is one of the oldest known metalworking processes. Metals can be forged cold, warm or hot. Cold forging is used for forming softer materials and smaller steel parts, but this process hardens the material making it brittle and difficult to process after forging. Hot forging is when a part is heated above the material recrystallization temperature before forging, typically 1100°C (2012°F). Warm forging is forging a part below the recrystallization temperature, typically below 700°C (1292°F). Read more in our 8 page brochure!


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Popular Induction Forging Notes

Click to read how induction heating can improve the efficiency, effectiveness and safety of your forging process.

Forging a magnetic steel rodForging a magnetic steel rod

Testing determined that the magnetic steel rod heated to required temperature within 1.5 seconds with an EASYHEAT LI induction heating system.

Preheating steel rods for forging in a fastener manufacturing processPreheating steel rods for forging in a fastener manufacturing process

The client targeted an aggressive cycle time, achieve thanks to our process design and the efficiency of induction heating; fast heating means greater manufacturing throughput

Forging rods of various materials and dimensionsForging rods of various materials and dimensions

Each of the rods were placed into the coil and heated. They achieved the targeted temperature in 30-40 seconds. The coil was designed for a 5” (127 mm) heat zone.

Preheating a billet for forgingPreheating a billet for forging

The client needed to improve the cycle time of their gas furnace, and by preheating it prior to insertion into the furnace, time was saved and the client didn’t have to invest in doubling the size of their furnace.

Preheating a brass rod for forgingPreheating a brass rod for forging

The client wanted to cut the cycle time it was getting from a torch in half, and the Ambrell induction process was able to meet that goal.

Induction heating is an optimal option for many forging applications. The process and economic inefficiencies of gas furnaces or flames are avoided with this unique technology which quickly and accurately delivers the required heating to the workpiece only. Additional benefits accrue since the heating can be integrated into the forging process nearest to the die. With Ambrell's modern technology, remote workheads are placed directly into production lines for high volume rapid forging processes.
Hot forging takes place at workpiece temperatures above which recrystallization occurs. This process requires uniform through-heating. Typical part geometries are simple, often comprising of bar stock, tubular products and sheet metal.