| 摘要 |
<p>A method for cutting a piece (2) of ferrous material by means of a laser beam (3), wherein an oxygen jet is conveyed on to cutting area (6) through a solid-walled duct (13), guiding said jet substantially until it comes into contact with a surface (7) of workpiece (2); said laser beam (3) exercising on workpiece (2) a power density greater than 10?6 KW/cm2¿; oxygen being conveyed on to said workpiece (2) with such an impact pressure, as to trigger, at such a power density, iron oxidation exothermic reactions of the combustion type, and being conveyed in such quantities, as to slightly exceed the relevant stoichiometric ratio, so that such reactions may be complete, as well as maintained under dynamic balance conditions.</p> |
