Patent ID: 6826940
Filing Date: 2004-12-07
Classification: B21C,B21H,B21J,B23P,C21D,C22F

Abstract:
A metal and alloy treatment method to deform at least a section of a billet through reduction of the billet's cross-section, the method comprising:reducing a cross-section of the billet section by rolling the billet alone and across its axis under the following conditions: &sgr;u>&sgr;ie, where &sgr;i is stress on the billet section according to deformation resistance produced by rollers during the rolling, &sgr;u is stress caused by loss of billet stability and &sgr;e is stress caused by compression; andapplying strain by a step selected from applying a torsion force and applying an extension force; wherein a microstructure is provided with intrinsic physical and mechanical characteristics.