摘要:
Coating layers having different thicknesses are produced by the variation of the powder mass flow, whereby the microstructure of the entire build-up welded area (13) is adjusted in a targeted and an advantageous manner.
摘要:
The invention relates to a welding method for welding workpieces (9) made of highly heat-resistant superalloys. Said method includes: generating a heat input zone (11) on the workpiece surface (10) by means of a heat source (3); feeding welding filler material (13) into the heat input zone by means of a feeding device (5); and generating a relative motion between the heat source (3) and the feeding device (5) on one hand and the workpiece surface (10) on the other hand by means of a conveying device (15). Furthermore, according to the welding method, the mass feed rate is ≤ 350 mg/min.
摘要:
Improved build-up welds are achieved by means of a targeted frequency selection and an amplitude which relates to the diameter (d) of the energy beam.
摘要:
The invention introduces a method for generating, in layers, an application structure (420) made of high heat resistant super alloys on a substrate (415). A powdery construction material is melted by an energy beam at a working point, wherein the working point is guided across the substrate along a primary movement direction and thus swings transversely to the primary movement direction. According to the invention, the working point thereby swings from a first edge of a respective layer of the application structure to a second edge of the layer. In this way, a time interval passes between departure from a respective edge and a return to the respective edge directly following the departure, such that a melt bath on the respective edge solidifies into a paste-like zone during the time interval.
摘要:
The invention relates to homogeneously welded surfaces produced by contiguous weld seams (10, 10'), said surfaces being obtained by a defined overlapping region (ΔO) of the adjacent weld seams (10, 10').
摘要:
Disclosed is an apparatus (1) for laser hardfacing in which a scanner device (11) and a feeding device (8) for a material used for hardfacing are arranged in an interconnected manner. The apparatus (1) further comprises a laser device (2) and a control device (13). The apparatus (1) allows the laser beam (2a) to wobble during the laser hardfacing process. A method for laser hardfacing using a wobbling movement is also disclosed.
摘要:
Through the targeted selection of method parameters with respect to laser welding, advancement, laser power beam diameter and powder mass flow, the temperature gradient, which is fundamentally decisive for the single-crystal growth during laser cladding, can be set in a targeted manner.