Closed Die Forging – Lubrication and Surface Effects

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4 Terms

1
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Where is the lubricant applied in closed die forging?

In the tool cavity

2
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Besides reducing friction, what other important function does the lubricant serve?

Cooling the die

3
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What is the name of the layer that forms on the hot workpiece when exposed to air?

Scale

4
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What are the properties of the scale layer during forging?

Brittle and flakes off during forming