Process of heating and cooling metal. Hardening of steel part in production

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Photo credit: © Sergei Dvornikov / Alamy / Afripics
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Keywords: activity, automation, background, closeup, detail, engineering, equipment, factory, fire, flame, glowing, hardening, heat, hot, induction, industrial, industry, iron, job, machine, machining, manufacture, metal, metalworking, moving, part, plant, process, product, red, steel, technology, tempering, tool, work, workpiece