Zinc Coated Press-Hardening Steel - Challenges and Solutions

Paper #:
  • 2015-01-0565

Published:
  • 2015-04-14
DOI:
  • 10.4271/2015-01-0565
Citation:
Kurz, T., Luckeneder, G., Manzenreiter, T., Schwinghammer, H. et al., "Zinc Coated Press-Hardening Steel - Challenges and Solutions," SAE Technical Paper 2015-01-0565, 2015, doi:10.4271/2015-01-0565.
Pages:
6
Abstract:
Press-hardening steels get more and more popular for body in white applications as an approach to meet the demands of passenger safety and CO2 reduction. Unlike the larger part of the structure that is typically zinc coated, the majority of the PHS parts is either uncoated or aluminum silicon coated. This paper shall give an overview of press-hardening steels with zinc coatings with detailed results for corrosion resistance, weldability and mechanical properties for strength levels of 490 to 1800 MPa.Furthermore as for zinc coated material maintaining a robust press-hardening process is of even higher importance than for uncoated or AlSi coated material. A range of different processes including indirect and direct process are shown in detail. Especially the topic of micro-cracks, mechanisms and avoidance of micro-cracks in the direct process will be discussed. Results from industrial and semi industrial production are shown.
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