Your browser doesn't support javascript. This means that the content or functionality of our website will be limited or unavailable. If you need more information about Vinnova, please contact us.

Protective metal coating

Reference number
Funding from Vinnova SEK 3 862 000
Project duration January 2012 - December 2014
Status Completed
Venture FFI - Sustainable Production
End-of-project report 2011-03669_publik_EN.pdf (pdf, 792 kB)

Purpose and goal

A pre-treatment of uncoated boron steel has been investigated, which after hot stamping results in the formation of an oxide showing excellent adhesion to the steel. The objective has been to build up an understanding of the process, optimize, and implement it. The effect of the pre-treatment has been verified and knowledge has been acquired about how the process improves the oxide adhesion. Small variations in the incoming material affect the process window, which has made implementation more difficult than anticipated.

Results and expected effects

The performed research has resulted in an increased understanding of the oxide growth during press-hardening and the factors influencing scale adhesion, not only in the suggested process but also in the standard process. The acquired knowledge is anticipated to enable the development of a stable process where subsequent shot-blasting can be eliminated.

Approach and implementation

The project has been carried out in close collaboration between Gestamp HardTech AB, Swerea MEFOS and Luleå University of Technology (LTU). Material showing different degree of scale adhesion has been produced both in lab- and pilot scale, and this material has been investigated, tested, and characterized in order to understand what factors influence the oxide adhesion. The collaboration has been successful, where all project partners have contributed in supplementary ways and the people involved have gained much knowledge along the way.

The project description has been provided by the project members themselves and the text has not been looked at by our editors.

Last updated 9 January 2020

Reference number 2011-03669

Page statistics