Methods for forming an electrode for use in forming a honeycomb extrusion die. The method includes forming, by means of an additive manufacturing process, an electrode includes a base having a web extending from the base. The web defines a matrix of cellular openings. The method further includes forming a secondary electrode having a plurality of pins. The plurality of pins are shaped and arranged so as to mate with the matrix of cellular openings defined by the web of the electrode. The method further includes machining the electrode using the secondary electrode to smooth surfaces of the electrode formed by the additive manufacturing process.

A process for removing metallic support structures, sinter cakes and/or discharge lugs on an additively manufactured metal component, wherein the metal component is treated electrolytically in an acidic electrolyte, the metal component being operated as an anode for a defined period of time, wherein, during the defined period of time, a higher voltage and then a lower voltage or a higher current density and then a lower current density are alternately applied to the metal component multiple times.

A process for removing metallic support structures, sinter cakes and/or discharge lugs on an additively manufactured metal component, wherein the metal component is treated electrolytically in an acidic electrolyte, the metal component being operated as an anode for a defined period of time, wherein, during the defined period of time, a higher voltage and then a lower voltage or a higher current density and then a lower current density are alternately applied to the metal component multiple times.

A 3-D printing method and a 3-D printout are provided. In an embodiment, the 3-D printing method includes laser-scanning a printing material according to a 3-D printing model so that the printing material starts to be sintered into a printout in a shape, layer by layer from the bottom up; and feeding a treatment gas into a 3-D printing device and laser-scan a local area of the printout so that the treatment gas reacts with the surface of the local area of the printout and a hardened layer is formed. The laser scanning and the feeding of the treatment gas are performed alternately until a printout with local hardened layers is formed. By adjusting the gas environment, the components can be manufactured by selective laser melting equipment to have a wear- and corrosion-resistant nitrided surface layer and keep the expected ductility of the central area.

A 3-D printing method and a 3-D printout are provided. In an embodiment, the 3-D printing method includes laser-scanning a printing material according to a 3-D printing model so that the printing material starts to be sintered into a printout in a shape, layer by layer from the bottom up; and feeding a treatment gas into a 3-D printing device and laser-scan a local area of the printout so that the treatment gas reacts with the surface of the local area of the printout and a hardened layer is formed. The laser scanning and the feeding of the treatment gas are performed alternately until a printout with local hardened layers is formed. By adjusting the gas environment, the components can be manufactured by selective laser melting equipment to have a wear- and corrosion-resistant nitrided surface layer and keep the expected ductility of the central area.

An austenitic stainless-steel powder having a nickel content of less than or equal to 0.5% by weight and a specific carbon content that is greater than or equal to 0.05% and less than or equal to 0.11% by weight. A method for manufacturing the powder by powder metallurgy and parts resulting from the manufacturing method, which have the characteristic of having a deoxidised layer on the surface of the part extending over a thickness greater than or equal to 200 μm.

An austenitic stainless-steel powder having a nickel content of less than or equal to 0.5% by weight and a specific carbon content that is greater than or equal to 0.05% and less than or equal to 0.11% by weight. A method for manufacturing the powder by powder metallurgy and parts resulting from the manufacturing method, which have the characteristic of having a deoxidised layer on the surface of the part extending over a thickness greater than or equal to 200 μm.

Orthopedic implants produced by additive manufacture, followed by refinement of exterior and interior surfaces trough mechanical erosion, chemical erosion, or a combination of mechanical and chemical erosion. Surface refinement removes debris, and also produces bone-growth enhancing micro-scale and nano-scale structures.

Provided is a method of manufacturing a machine part having a radial crushing strength of 120 MPa or more, including: a compression molding step of compressing raw material powder including, as a main component, metal powder that is capable of forming an oxide coating and has a pure iron powder content ratio of 95 mass % or more, to thereby obtain a green compact (10) having a predetermined shape; and a coating forming step of causing the metal powder to react with an oxidizing gas while heating the green compact (10) at a temperature lower than a sintering temperature of the metal powder in an oxidizing gas atmosphere, to thereby obtain a reinforced green compact (11) in which the oxide coating (5) is formed between particles of the metal powder.

A method for producing a valve seat ring via powder metallurgy may include compacting a powder mixture including 4% by weight to 16% by weight particles of cobalt to form the valve seat ring. The method may also include sintering the powder mixture after compacting the powder mixture. Before compacting the powder mixture, 80% of the particles of cobalt may have a particle diameter of approximately 4.4 μm to 17.5 μm.