During mould making by wire cut EDM, it is important to harden ______ to counter the effects of changes in the shape of the workpiece due to heat treatment.

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Wire-cut electrical discharge machining (WEDM) is a non-contact manufacturing process that uses a thin, electrically charged wire to cut metal.

The wire follows a programmed path, and heat from electrical sparks cuts through the metal. WEDM is often used to cut plates up to 300 mm thick and to make tools, punches, and dies from hard metals. It's considered a precise cutting method.


During mould making by wire cut EDM, it is important to harden ______ to counter the effects of changes in the shape of the workpiece due to heat treatment.