摘要:
Apparatus for additive manufacturing (100), comprising: - a platform (6b, 6b') adapted to receive a powder bed (6) that is laid thereon; - a laser source (2) adapted to emit a laser beam (4) towards the powder bed (6); - a doctor blade (8) adapted to move transversally relative to the platform (6b, 6b') in a direction parallel to the plane in which the powder bed (6) lies, thereby moving the powder towards a work area (10), in which the laser beam (4) progressively manufactures a product (12) by sintering the layer of powder just deposited by the doctor blade (8); wherein said doctor blade (8) is provided with at least one illuminator (52) arranged in the lower part of the doctor blade (8) itself, said at least one illuminator (52) being an emitter with an emission range centered in the spectral region from 300 to 1000 nm.
摘要:
The present invention relates to a method of forming a three- dimensional article through successively depositing individual layers of powder material that are fused together so as to form the article, comprising a method of operating a triode electron beam source including a cathode (102), a grid (104) and an anode (106) with the following steps: (a) setting an electron beam current, a cathode heating power, a grid potential Ug and a cathode potential Uc to predetermined start values; (b) reducing the cathode heating power and decreasing a Ug - Uc potential difference for mainintainig a predetermined electron beam current; (c) detecting an X-ray signal emanating from the electron beam source with at least one X-ray detector (190); (d) repeating said reducing and detecting steps until the detected X- ray signal is above a predetermined value; and (e) increasing the cathode heating power by a predetermined safety value above the heating power value which resulted in X-ray signals above said predetermined value. Thereby, the lowest acceptable cathode heating power without affacting the electron beam current is determined and thus the lifetime of the cathode element is prolonged.
摘要:
A solid oxide fuel cell interconnector comprises chromium and at least one conduction enhancing material, the at least one conduction enhancing material comprising MnO, TiO 2 , or MgO. During oxidation or use of the interconnector the conduction enhancing material disperses over the surface of chromium particles (e.g., Cr 2 O 3 ) and enhances the electrical conductivity of the interconnector.
摘要翻译:固体氧化物燃料电池互连器包括铬和至少一种导电增强材料,所述至少一种导电增强材料包含MnO,TiO 2或MgO。 在氧化或使用互连器期间,导电增强材料分散在铬颗粒(例如Cr 2 O 3)的表面上,并且增强了互连器的导电性。
摘要:
Methods are presented for making sintered articles from water-atomized nickel-based superalloy powders. Three-dimensional binder jet printing is used to make a printed article from the powder. The printed article is liquid phase sintered without slumping at a temperature at which at least fifteen volume percent of the powder is liquid during sintering.
摘要:
The present disclosure relates to a method for manufacturing a metallic component (50) comprising the steps: - providing (100) a capsule (5) which defines at least a portion of the shape of the metallic component (50); - arranging (200) metallic material (7) in the capsule (5); - sealing (300) the capsule (5); - subjecting (400) the capsule (5) to Hot Isostatic Pressing for a predetermined time, at a predetermined pressure and at a predetermined temperature; - optionally, removing (500) the capsule (5); characterized in that the metallic material (7) comprises at least one pre-manufactured coherent body (1, 2, 3, 4) which pre-manufactured coherent body (1, 2, 3, 4) consists of metallic powder wherein at least a portion of the metallic powder is consolidated such that the metallic powder is held together into a pre-manufactured coherent body (1, 2, 3, 4) and wherein at least one portion (1, 2, 3, 4) of the pre-manufactured coherent body (1, 2, 3, 4) is manufactured by Additive Manufacturing by subsequently arranging superimposed layers of metallic powder.
摘要:
Proceso de reciclado de materiales metálicos granulados conteniendo impurezas superficiales, que combina un subproceso 1 y un subproceso 2, donde en el subproceso 1 se produce la eliminación parcial del material contaminante mediante calentamiento del material de partida hasta una temperatura inferior o igual a 300ºC, en atmósfera oxidante controlada; y en el subproceso 2, en atmósfera inerte, se calienta el material hasta 400-550ºC y se eliminan restos de material contaminante que aún quedan por un efecto combinado térmico-mecánico.
摘要:
An airfoil has a body that includes leading and trailing edges joined by spaced apart pressure and suction sides to provide an exterior airfoil surface. A leading edge wall provides the exterior airfoil surface at the leading edge. An impingement wall is integrally formed with the leading edge wall to provide an impingement cavity between the leading edge wall and the impingement wall and multiple impingement holes are provided in the impingement wall. The impingement holes are spaced laterally across the impingement wall. A method of manufacturing an airfoil includes the steps of depositing multiple layers of powdered metal onto one another, joining the layers to one another with reference to CAD data relating to a particular cross-section of an airfoil, and producing the airfoil.