An additive manufacturing system is disclosed including multiple conveying pipelines, a mixer and a nozzle. The multiple conveying pipelines are connected to respective material sources. The multiple conveying pipelines are connected to the mixer which is configured to mix in real time powder materials supplied via the multiple conveying pipelines during additive manufacturing. The mixer is connected via a supply pipeline to the nozzle which is configured to deliver mixed material onto a substrate to perform the additive manufacturing. Each of the multiple conveying pipelines is configured to change conveying amount or speed of the powder materials in real time. An additive manufacturing method for the above additive manufacturing system is also disclosed. The additive manufacturing system and method can adjust in real time types or proportions of the materials so as to meet different property requirements for different parts of a product.

A feed head apparatus for laser additive manufacturing, comprising an optical housing configured to receive a laser beam and a feedstock therein, wherein the feedstock is for use in an additive manufacturing process that includes a build plate or other additive manufacturing work surface; a first reflective optic for receiving and reflecting the laser beam; and a second reflective optic for receiving laser light reflected by the first reflective optic, wherein the second reflective includes a first region of curvature for directing a portion of the laser light received from the first reflective optic onto the feedstock in a cylindrical configuration such that the feedstock and the cylinder of laser light are coaxial with regard to one another; and a second region of curvature for directing a portion of the laser light received from the first reflective optic onto the build or surface only in a ring-shaped configuration, wherein the ring of laser light surrounds the feedstock and the cylinder of laser light and is coaxial therewith.

A controlled thermal coefficient product manufacturing system and method is disclosed. The disclosed product relates to the manufacture of metallic material product (MMP) having a thermal expansion coefficient (TEC) in a predetermined range. The disclosed system and method provides for a first material deformation (FMD) of the MMP that comprises at least some of a first material phase (FMP) wherein the FMP comprises martensite randomly oriented and a first thermal expansion coefficient (FTC). In response to the FMD at least some of the FMP is oriented in at least one predetermined orientation. Subsequent to deformation, the MMP comprises a second thermal expansion coefficient (STC) that is within a predetermined range and wherein the thermal expansion of the MMP is in at least one predetermined direction. The MMP may be comprised of a second material phase (SMP) that may or may not transform to the FMP in response to the FMD.

A shielding gas nozzle for metal forming includes a wire feed line being a path to feed a wire at an inclination angle θ, a first gas ejection hole to jet a shielding gas at an angle equal to or less than the inclination angle θ, and a second gas ejection hole to jet the shielding gas in a direction different from that of the first gas ejection hole. The first gas ejection hole jets the shielding gas toward an intersection along a direction in which the absolute value of the angle to the wire feed direction is less than 90 degrees, and the second gas ejection hole jets the shielding gas toward the intersection along a direction in which the absolute value of the angle to the wire feed direction when viewed in the direction perpendicular to the base material surface is greater than 90 degrees.

A powder dispensing head (1) for an additive manufacturing machine comprises a through-opening designed to allow the passage of a high-energy beam towards the melting point, a body (2) comprising N powder conveying ducts uniformly distributed about the through-opening and converging towards the melting point, a dispensing member (3) comprising a powder dispensing chamber having a powder inlet, and N powder outlets uniformly distributed about the through-opening, the body (2) and the dispensing member (3) being configured to be able to move relative to one another so as to fluidically connect or disconnect the powder outlets with respect to the respective powder conveying ducts according to the relative position of the dispensing member (3) with respect to the body (2).

Subject-matter of the invention is a method of applying silicon carbide-containing materials to a substrate surface, and an apparatus for carrying out the method.

A device for a laser machining system includes a laser beam optics for a machining laser beam with an arrangement of optical elements arranged one after the other in a beam path of the machining laser beam. With respect to a direction of propagation of the machining laser beam, a first outermost optical element of the arrangement of optical elements consists of a material with a thermal conductivity coefficient k.sub.T of 2 W/(m.Math.K) or more.

A laser material processing head, such as a remote welding head, has an output with a protective optic configured to pass an emitted laser to a working area. The protective optic, such as a cover slide of the output, protects other optics inside the head and is a replaceable, spare part. To prevent at least some debris expelled from the working area from reaching the protective optic, a nozzle is mounted to the head adjacent to the protective optic. The nozzle has an inlet and an outlet for the gas. The outlet has a curvilinear profile configured to fan a cross-jet of the gas in the plane between the protective optic and the working area. The profile of the nozzle reduces the amount of gas needed to divert the debris from the protective optic.

The present disclosure relates a method for forming a second material from a first material. The method involves providing a first material having a surface, and irradiating the surface with a heating beam. The surface is also exposed to a flow of reactant while the surface is being heated with the heating beam. This transforms at least a portion of the surface into a second, transformed material different from the first material.

This laser welding device includes a tubular portion. The tubular portion includes a first tubular portion and a second tubular portion. The second tubular portion has a constant cross-sectional shape orthogonal to an irradiation direction along the irradiation direction E. The tubular portion has a predetermined length that is longer than a length of a chamber in the irradiation direction.