Question

Which of the following is a common defect in wire drawing processes, particularly when excessive friction is present at the die-workpiece interface?

• A. Die wear
• B. Surface cracks on the wire
• C. Material elongation
• D. Necking of the wire

Hint:

High friction in wire drawing leads to increased surface stress, which often causes surface cracks on the drawn wire.

Answer 1

The Correct Option is B

In wire drawing, excessive friction at the die-workpiece interface results in high surface stress and heat generation.
This leads to localized surface damage and can cause tensile cracks along the wire’s outer layer.
Surface cracks are the most commonly observed defects under these high-friction conditions, especially if lubrication is poor.
In contrast, die wear is more of a tool life concern, while elongation and necking are part of normal deformation behavior.