Cairo's Layout

A method for enhancing grain size uniformity in rolled alloy billets

Technology #inv229082015

Questions about this technology? Ask a Technology Manager

Download Printable PDF

Image Gallery
Researchers
Khalil ElKhodary
Mohamed Bakr
Hanadi Salem
Mohamed ElBadry
Managed By
Ahmed Ellaithy
Director, Technology Transfer +20226153112
Patent Protection

Provisional Patent Application Filed

Application

A Shear Enhanced Rolling (SER) method that enhances grain size uniformity in rolled alloy billets for metal forming and manufacturing.

Problem

In metal working, rolling is a metal forming process in which metal stock is passed through one or more pairs of rolls to reduce the thickness and to make the thickness uniform. However the majority of rolling machines fail to target the grain-size refinement in the core of the metal sheets and focus more on the surfaces. This in turn causes metal sheets to display variable grain sizes in cross-sections. 

Technology

SER is a manufacturing method, which adds a special shear-stage to existing rolling stages. Its function is to enhance plastic 'shear deformation' across cross sections of rolled metallic billets, thereby improving grain size uniformity. The distinctiveness of this invention is in its ability to target grain-size refinement in the core of a billet more than the surfaces, which is rendered possible only by our introduction of "longitudinal shear" (the first of its kind in the field of rolling), and is induced by carefully designed "transverse forces". This is a unique mechanism by which grain size uniformity across the billet cross section becomes possible, with an added benefit that the produced net average grain size is also significantly decreased for the same number of rolling passes.

Advantages

  •  Enhances plastic shear in the core of the billet
  •  Higher strength
  •  Higher Damage tolerant rolled sections
  •  Especially effective in thick cross-sections
  •  Higher degree of control over designing for strength, ductility, and toughness