| 摘要 |
Method of laser hardening of a surface area of a workpiece, such as a surface of a journal of a crankshaft, comprising: generating a relative movement between the surface of the workpiece and a laser source to allow a laser spot to subsequently be projected onto different portions of said surface area, and during said relative movement, repetitively scanning the laser beam (2) so as to produce a two-dimensional equivalent effective laser spot (5) on said surface area. The scanning pattern can comprises at least three substantially parallel lines which the laser spot follow in a certain order. When the workpiece comprises several journals having different widths, two laser sources (1, 1A) may be used to harden the surface area of the wider journals. |
