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    12th International Conference on Zinc & Zinc Alloy Coated Steel Sheet - GALVATECH 2021

    21–23 Jun 2021 Virtual Conference
    Virtuel Conference
    Europe/Vienna timezone
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    Session

    PHS-AlSi & PHS-ZnFe: Controlling Surface Properties

    C
    22 Jun 2021, 10:40
    Virtuel Conference

    Virtuel Conference

    Conveners

    PHS-AlSi & PHS-ZnFe: Controlling Surface Properties

    • Weiping Sun
    • Paul Janavicius Janavicius (AK Steel Research and Innovation)

    Presentation materials

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    1. 207. NEW COATING FOR PRESS HARDENED STEELS: AlSiZnMg
      Tiago Machado (ArcelorMittal)
      22/06/2021, 10:40
      Press Hardening of Coated Steels
      Oral Presentation
      The Press Hardened Steels (PHS) offer unique weight saving opportunities to the automotive market, allowing to reach extremely high mechanical properties (until 2000 MPa) on complex parts with a well-controlled geometry. Since 2001, pre-coated PHS are available. AlSi coated PHS are the mostly used worldwide with more than 75% of the hot stamping lines in the world dedicated to them. This...
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    2. 201. ON THE REDUCTION OF TEMPERATURE GRADIENTS WITHIN AlSi-COATED BLANKS WITH NON-CONSTANT SHEET THICKNESS FOR HOT PRESS FORMING APPLICATION
      Friedrich Luther (Salzgitter Mannesmann Forschung GmbH)
      22/06/2021, 11:00
      Press Hardening of Coated Steels
      Oral Presentation
      When heating steel blanks with different sheet thicknesses within prior to a hot press forming process, local heating rates may differ significantly. Therefore, the process window for heating the blanks is narrow, especially when aluminium-silicon (AlSi) coated material is used. The thicker part of the blank determines the minimum furnace dwell time for alloying of the coating to achieve...
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    3. 185. INFLUENCE OF OXIDE COMPOSITION AND SHOT BLASTING PARAMETERS ON SURFACE RESISTANCE OF GALVANIZED PRESS HARDENED STEELS
      Ernst Dietmar Schachinger (voestalpine Stahl GmbH)
      22/06/2021, 11:20
      Press Hardening of Zn-Based Coatings
      Oral Presentation
      For galvanized press hardening steels, a low and homogeneous surface resistance is important to ensure good welding behavior for body in white assembly. Surface resistance and oxide composition was studied for steel grade 20MnB8 with different coatings (GI vs. GA) and different annealing times. The results were also compared to standard steel grade 22MnB5 coated with GI. Oxide composition was...
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    4. 180. NANOSCALE STRUCTURE AND COMPOSITIONAL ANALYSIS OF SURFACE OXIDES ON HOT-DIP GALVANIZED PRESS-HARDENED STEEL
      Wolfgang Gaderbauer (Christian Doppler Laboratory for Nanoscale Phase Transformations, Center for Surface and Nanoanalytics, Johannes Kepler University Linz)
      22/06/2021, 11:40
      Press Hardening of Zn-Based Coatings
      Oral Presentation

      Insights into the structure of surface oxides on Zn-coated press-hardened steel (PHS) are indispensable for further processing like welding or adhesive bonding. The main oxide on top of galvanized steel is Al2O3 from the primary galvanizing process. This oxide is strongly altered during final austenitization annealing before hot-forming respectively press-hardening, depending on the annealing...

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