How Does Forging Work? Step by Step
A forging passes through eight distinct stages between raw bar and packed component. Each one is controlled and recorded, because a failure at any stage cannot be corrected downstream.
Forging works in eight stages: material verification, billet cutting to weight, induction heating to 1,150–1,250°C, forging in blocker and finisher dies, hot flash trimming, heat treatment, shot blasting and machining, then inspection and packing. The metal stays solid throughout.
- Stage 1
- Material verification and billet cutting
- Stage 2
- Induction heating to 1,150–1,250 °C
- Stage 3
- Forging in blocker and finisher dies
- Stage 4
- Hot flash trimming
- Stage 5–6
- Heat treatment and shot blasting
- Stage 7–8
- CNC machining, inspection and packing
How Does Forging Work? Step by Step at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Eight controlled stages from bar to packed part
- Billet cut accuracy of ±1 mm controls forged weight to ±2%
- Induction heating with pyrometer verification per batch
- Flash trimmed hot, immediately after forging
- Machining reaches ±0.02 mm on critical features
Stages One to Four: Preparation and Forming
Bar is spectro-tested and cut to a calculated billet weight within ±1 mm. The billet is induction heated to 1,150–1,250°C with pyrometer verification. It is then struck or pressed in blocker and finisher impressions until the cavity fills. Flash is trimmed hot on a dedicated press.
- Material verified by spectrometry
- Billet cut to ±1 mm length
- Induction heated, pyrometer checked
- Forged, then hot trimmed
Stages Five to Eight: Properties and Verification
Controlled cooling or a normalising cycle refines grain. Heat treatment sets final hardness, recorded on furnace charts. Shot blasting removes scale. CNC machining brings critical features to ±0.02 mm. Inspection, NDT where specified, and export packing complete the route.
Why Each Stage Is Recorded
A hardness problem traced back through furnace charts takes hours to diagnose. Without those records it takes weeks and usually ends in argument. Recording is what makes the process controllable rather than merely repeatable by habit.
People also ask
What is the first step in forging?
Verifying the incoming steel by spectro analysis against its mill certificate, then cutting billets to a calculated weight within ±1 mm so cavity fill and forged weight stay consistent.
Why is the billet heated before forging?
Above its recrystallisation temperature, steel's resistance to deformation collapses and new strain-free grains continuously replace deformed ones, so it can be shaped heavily without work hardening or cracking.
What happens after a part is forged?
Flash is trimmed hot, the part is heat treated to develop its properties, shot blasted to remove scale, machined to final dimensions, then inspected and packed with its certificates.
Topics covered on this page
- billet
- induction heating
- blocker impression
- finisher impression
- flash trimming
- heat treatment
- shot blasting
- CNC machining
- spectrometry
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
What are the steps in the forging process?
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Material verification, billet cutting, heating, forging, trimming, heat treatment, shot blasting, machining and inspection.
How long does the forging process take per part?
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The forging operation itself takes seconds to a few minutes. The full route including heat treatment and machining runs across days.
Is the metal melted during forging?
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No. Forging keeps the metal solid throughout — that is the fundamental difference from casting.
What happens to the trimmed flash?
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It is collected and recycled as scrap, returning to steel producers for remelting.