摘要:
There is disclosed a method of treating a metal article which tapers towards an edge. A compressive force is applied to a treatment region of the article to generate an edge region of compressive residual stress adjacent the edge, and the treatment region is spaced apart from the edge region by an intermediate region.
摘要:
In one embodiment, a laser peening apparatus includes an output unit (41) configured to output laser light (6); a light-guide unit (31) configured to guide the outputted laser light (6); a condenser lens (42) configured to condense the guided laser light (6) ; an irradiation nozzle (32) configured to radiate the condensed laser light (6) ; a focus-change unit (50) configured to change a focal position of the laser light (6) based on distance from an irradiation target (4, 5) of the laser light (6) to the irradiation nozzle (32); and a control unit (66) configured to apply laser peening by radiating the laser light (6) toward the irradiation target (4, 5) which is in contact with water.
摘要:
The method involves subjecting at least a portion of the part to a first step that involves moving at least one laser beam in at least one pass over said portion, until partial or total transformation of the surface layer of the portion in question and modification of the concentration distribution of nitrogen in the diffusion area, and subjecting at least the portion treated by laser to transform the surface layer, to a second step that involves moving at least one laser beam in at least one pass over said portion in order to reduce the nitrogen concentration in the underlying diffusion layer.
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.
摘要:
The invention relates to a method of fabricating a module (1) for an airframe or fuselage structure of an aircraft or spacecraft, comprising the steps of: positioning a first member adjacent to a second member at an assembly station, welding the first member to the second member at the assembly station to produce a module (1) having a welded joint between the first and second members, and treating, especially by laser shock peening, at least one of the first member , the second member, and/or the welded joint at the assembly station to compensate for or to correct distortion caused by the welding.