"Optimization and Stability of Production of Heavy Gauge EH47 Ship Plate"

oleh Douglas G. Stalheim

Penerbit - "DGS Metallurgical Solutions, Inc., Vancouver, WA USA Consultant – CBMM Technology Suisse SA, Geneva, Switzerland"

Kategori - Kejuruteraan & IT

"The movement of products around the world via large container ships continues to be the main mode of transportation with load carrying capacity beyond the typical normal load capacity of 8000 TEU to now upwards of 15,000 TEU. As the load carrying capacity is increased the use of thicker plates up to 100 mm with higher strength, ABS EH47, with excellent low temperature toughness are required. The combination of thicker plates, higher strength and excellent low temperature toughness creates challenges for the plate producers to balance these requirements during production. Qualification of plate for these larger vessels requires passing a rigorous full thickness large plate toughness/crack arrest test called the ESSO test. To create the proper cross sectional metallurgy suitable for passing the challenging ESSO test, proper niobium microalloy technology and steelmaking/plate processing is required. Optimization and stabilization of mechanical properties of strength and especially low temperature toughness within the confines of normal variations in steel production of plates with thicknesses up to 100 mm requires a proper alloy/slab/process design. This paper will briefly describe the alloy/slab/processing strategy for optimum and stable through thickness mechanical properties in heavy gauge plate for high strength low temperature toughness large container ship applications."

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