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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-ZnFe: Liquid and Vapour Metal Induced Embrittlement

    A
    23 Jun 2021, 14:00
    Virtuel Conference

    Virtuel Conference

    Conveners

    PHS-ZnFe: Liquid and Vapour Metal Induced Embrittlement

    • Friedrich Luther (Salzgitter Mannesmann Forschung GmbH)
    • Weimin Zhong (ArcelorMittal Dofasco)

    Presentation materials

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    1. 189. AVOIDING ZINC INDUCED CRACKING IN HOT FORMING
      Josef Faderl (voestalpine Stahl GmbH)
      23/06/2021, 14:00
      Press Hardening of Zn-Based Coatings
      Oral Presentation

      Galvanized press hardened steel (PHS) is in serial production more than 15 years. Zinc provides excellent cathodic corrosion protection for PHS parts, but can cause Liquid Metal Embrittlement (LME) and micro cracks. One can dispose of this LME risk by using the indirect hot forming process and avoiding tensile stress at high temperatures. To eliminate LME for the direct hot forming process...

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    2. 143. THE EFFECT OF Si ADDITION ON Zn-ASSISTED LIQUID METAL EMBRITTLEMENT IN 22MnB5 PRESS HARDENING STEEL
      Seok-Hyun Hong (Graduate Institute of Ferrous Technology, POSTECH, Pohang 37673, S. Korea)
      23/06/2021, 14:20
      Press Hardening of Zn-Based Coatings
      Oral Presentation
      22MnB5 press hardening steel is widely applied for automobile parts due to its reduced spring back effect after forming. In press hardening process, 22MnB5 steels are deformed by the press at high temperature and simultaneously quenched to obtain fully martensitic microstructure after the austenitization process. However, during the press hardening of Zn-coated 22MnB5 steels, the presence of...
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    3. 199. SCANNING ELECTRON MICROSCOPE INVESTIGATION ON ZINC INDUCED CRACKS OF COATED PRESS HARDENED COMPONENTS
      Prof. Thomas Antretter (Montanuniversitaet Leoben / Institute of Mechanics)
      23/06/2021, 14:40
      Press Hardening of Coated Steels
      Oral Presentation

      Zinc coatings offer the advantage of a galvanic corrosion protection instead of a conventional barrier corrosion protection. Thus zinc coatings prevent the corrosion of the steel substrate even in the case of a damaged coating layer. It is therefore of interest to use zinc coatings in the automobile industry particularly for components of the body in white. These components are often produced...

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    4. 19. ON THE ORIGIN OF MICRO-CRACKING IN ZINC COATED PRESS HARDENED STEELS
      Dr Joseph McDermid
      23/06/2021, 15:00
      Press Hardening of Zn-Based Coatings
      Oral Presentation

      Zn-coated press hardened steels are in high demand in the automotive industry because their high strength enhances passenger safety while supplying robust cathodic corrosion protection. However, micro-crack formation after thermomechanical processing is an issue that limits full deployment. Thereby, the objective of this research was to determine the mechanism for micro-cracking in Zn-coated...

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    5. 99. DEVELOPMENT OF A Zn-Al-Mn-Sb ALLOY COATING FOR PRESS HARDENABLE STEELS
      Neil Gao (Teck Metals Ltd.), Weiping Sun (Nucor Corporation)
      23/06/2021, 15:20
      Press Hardening of Zn-Based Coatings
      Oral Presentation
      As galvanized or galvannealed coatings (GI or GA) are often challenged by excessive zinc evaporation and liquid metal embrittlement (LME), aluminized coatings have become dominant for press hardenable steels (PHS). However, compared to aluminized coatings, galvanized coatings are more cost effective. Galvanized coatings not only provide cathodic protection to the steel substrate; they are...
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