laser surface hardening method of a part, system for hardening at least part of the surface of a part, computer program, apparatus for hardening a surface area of a part, and method of programming a device

摘要

The present invention describes a method of laser hardening a surface area of a workpiece, such as a crankshaft journal surface, comprising: generating relative motion between the workpiece surface and a laser source to allow a point is subsequently projected onto different portions of said surface area and, during said relative motion, repeatedly sweeping the laser beam (2) so as to produce an equivalent two-dimensional effective laser spot (5) in said area of surface. The energy distribution of the effective laser spot is adapted so that it is different in a more heat sensitive subarea, such as in an area adjacent to a lubrication hole, than in a less heat sensitive subarea. avoid overheating of the more heat sensitive subarea.