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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

    Furnace III - Rapid Cooling, Furnace Roll Coatings

    21 Jun 2021, 16:10
    Virtuel Conference

    Virtuel Conference

    Conveners

    Furnace III - Rapid Cooling, Furnace Roll Coatings

    • Juliana GUIMARÃES
    • Gerhard Angeli

    Presentation materials

    There are no materials yet.

    1. 203. EXPERIMENTAL AND NUMERICAL STUDY OF GAS JET COOLING AT HIGH REYNOLDS NUMBER
      Mr MICHEL DUBOIS (CMI INDUSTRY)
      21/06/2021, 16:10
      Challenges in Galvanizing Advanced High Strength Steels (GI, GA,…)
      Oral Presentation

      In order to characterise the maximum possible cooling rate for AHSS with non oxidizing gas a new test bench has been constructed at VKI, combining 1 central round jet surrounded by 6 jets. The facility allows jet Reynolds number up to 200.000, value for which very few experimental data are available in the literature. Results are obtained for different normalised standoff distances Z/D (ratio...

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    2. 25. INVESTIGATION OF "BUILD-UP" GROWTH BEHAVIOUR ON HEARTH ROLLS OF CONTINUOUS GALVANIZING LINE
      Sho Katsura (KOBE STEEL, LTD)
      21/06/2021, 16:30
      HDG Process Technology - Furnace, Galvanizing Bath, Coating Weight Control
      Oral Presentation
      Hearth rolls in continuous annealing furnace of CGL sometimes cause the trouble that some small protrusions grow up on the surface. Such troubles are called as “build-up” or “pick-up” and it can be a cause of surface defects of steel strips such as scratches, dents and so on. A lot of tentative theory is told about “build-up” as below: (1) Producing High-alloyed steel strips accelerates the...
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    3. 117. NON STICKING FURNACE ROLLS FOR STEEL PRODUCTS TO IMPROVE SERVICE LIFE AND PRODUCT QUALITY IN CONTINUOUS ANNEALING AND GALVANIZING LINES: PRELIMINARY STUDY ON CHEMICAL INTERACTIONS AND PICKUP MECHANISM
      Nicoletta Zacchetti (RINA-Centro Sviluppo Materiali SpA)
      21/06/2021, 16:50
      Process Technology - Pre/Post-Treatment (Strip Cleaning, Skin Passing, Passivation, Oiling)
      Oral Presentation
      Thermal spray cermet coatings are successfully applied on furnace rolls in continuous annealing and galvanizing lines. However, when processing HSS with high manganese and/or high silicon content, oxide pickups can be formed on the rolls working in the different furnace zones. The aim of this study was to acquire knowledge on the pickup mechanisms and the chemical interactions occurring...
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    4. 153. DEVELOPMENT OF AN ADVANCED ULTRA-FAST COOLING SECTION
      Maximilian Schleupen (Department for Industrial Furnaces and Heat Engineering, RWTH Aachen University)
      21/06/2021, 17:10
      HDG Process Technology - Furnace, Galvanizing Bath, Coating Weight Control
      Oral Presentation
      The realisation of economic and ecological aims led to a development of improved structural materials. Third generation Advanced High-Strength-Steels and their application in automotive bodies in white are one example of this trend. Those steels are often processed as thin strips in combined continuous annealing and galvanizing lines and require new heat treatment possibilities to acquire...
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