voestalpine eifeler Coatings North America

Stamping & Forming

Hot stamping has rapidly become a complement to cold forming in the automotive industry. By using a heated blank that forms and hardens quickly in the die, parts can be made larger, stronger and more complex than ever before. This means fewer structural parts per vehicle,with as much as 30–35 % weight reduction of individual parts. And it can eliminate some of the issues that exist during the cold blanking and forming of advanced high strength work materials that can lead to springback and cracking.  But because this is a hot process, high demands placed on the tool steel during hot stamping brings an increased risk of premature tool failures, leading to production stops and delays.

Bending
In bending there is normally only deformation about one axis. The tool steel selection depends primarily on the work materials type, strength, thickness and part complexity.

The most critical failure mechanisms for bending of:

  • Softer work materials ( ≤ 300 HB ) are abrasive and adhesive wear.
  • Harder work materials ( > 300 HB ) are abrasive, adhesive, galling and plastic deformation

Press Forming
Press forming is basically a cold bending operation used to shape, flange or make shallow impressions in a part previously blanked out or sheared from sheet.

The most critical failure mechanisms for press forming of:

  • Softer work materials ( ≤ 300 HB ) are abrasive and adhesive wear.
  • Harder work materials ( > 300 HB ) are abrasive, adhesive, galling and plastic deformation

Deep Drawing
Is basically a press forming operation where material is drawn into a die cavity and the flow is controlled by a blank holder. Deep Drawing is when draw depth is deeper than the punch width (diameter).

The most critical failure mechanisms for drawing of:

  • Softer work materials ( ≤ 300 HB ) are abrasive, adhesive wear and galling.
  • Harder work materials ( > 300 HB ) are abrasive, adhesive, galling and plastic deformation

In each of the applications mentioned above eifeler coatings should be consulted to see how our solutions can help to improve productivity.

Coating Selection Guide