General Studies · Metal Forming Processes
Why are lubricants typically avoided on die faces during the coining process?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1They increase the working temperature of the material.
- 2They get trapped in die cavities and prevent full reproduction of fine surface details.✓
- 3They cause oxidation of the workpiece material.
- 4They are not compatible with high pressure.
Correct answer
They get trapped in die cavities and prevent full reproduction of fine surface details.
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