Provided is a technique for fabricating a powder material bedded in advance using a DED nozzle. According to one embodiment, there is provided an AM apparatus for manufacturing a fabricated object. The AM apparatus includes a DED nozzle. The DED nozzle includes: a DED nozzle main body; a laser port disposed at a distal end of the DED nozzle main body and for emitting a laser beam, and a laser passage configured to communicate with the laser port and for allowing the laser beam to pass through the DED nozzle main body; and a powder port disposed at the distal end of the DED nozzle main body and for emitting a powder material, and a powder passage configured to communicate with the powder port and for allowing the powder material to pass through the DED nozzle main body. The AM apparatus further includes a cover configured to surround a peripheral area of the laser port and the powder port of the DED nozzle. The cover is configured to have an opened downstream side in an emission direction of the laser beam. The cover includes a gas supply passage for supplying a gas inside the cover. The gas supply passage is configured to be oriented so as to guide the gas toward the DED nozzle main body.

Provided is a technique for fabricating a powder material bedded in advance using a DED nozzle. According to one embodiment, there is provided an AM apparatus for manufacturing a fabricated object. The AM apparatus includes a DED nozzle. The DED nozzle includes: a DED nozzle main body; a laser port disposed at a distal end of the DED nozzle main body and for emitting a laser beam, and a laser passage configured to communicate with the laser port and for allowing the laser beam to pass through the DED nozzle main body; and a powder port disposed at the distal end of the DED nozzle main body and for emitting a powder material, and a powder passage configured to communicate with the powder port and for allowing the powder material to pass through the DED nozzle main body. The AM apparatus further includes a cover configured to surround a peripheral area of the laser port and the powder port of the DED nozzle. The cover is configured to have an opened downstream side in an emission direction of the laser beam. The cover includes a gas supply passage for supplying a gas inside the cover. The gas supply passage is configured to be oriented so as to guide the gas toward the DED nozzle main body.

Provided is a technique for fabricating a powder material bedded in advance using a DED nozzle. According to one embodiment, there is provided an AM apparatus for manufacturing a fabricated object. The AM apparatus includes a DED nozzle. The DED nozzle includes: a DED nozzle main body; a laser port disposed at a distal end of the DED nozzle main body and for emitting a laser beam, and a laser passage configured to communicate with the laser port and for allowing the laser beam to pass through the DED nozzle main body; and a powder port disposed at the distal end of the DED nozzle main body and for emitting a powder material, and a powder passage configured to communicate with the powder port and for allowing the powder material to pass through the DED nozzle main body. The AM apparatus further includes a cover configured to surround a peripheral area of the laser port and the powder port of the DED nozzle. The cover is configured to have an opened downstream side in an emission direction of the laser beam. The cover includes a gas supply passage for supplying a gas inside the cover. The gas supply passage is configured to be oriented so as to guide the gas toward the DED nozzle main body.

A printer includes a heat control device configured to prevent a temperature of a part that is printed by the printer from decreasing by more than about 5° C. as a height of the part increases from about 0 mm to about 30 mm. The heat control device includes a gas curtain source that is configured to generate a gas curtain that at least partially surrounds at least a portion of the part.

A printer includes a heat control device configured to prevent a temperature of a part that is printed by the printer from decreasing by more than about 5° C. as a height of the part increases from about 0 mm to about 30 mm. The heat control device includes a gas curtain source that is configured to generate a gas curtain that at least partially surrounds at least a portion of the part.

A printer includes a heat control device configured to prevent a temperature of a part that is printed by the printer from decreasing by more than about 5° C. as a height of the part increases from about 0 mm to about 30 mm. The heat control device includes a gas curtain source that is configured to generate a gas curtain that at least partially surrounds at least a portion of the part.

A printer includes a heat control device configured to cause a temperature of a part that is printed by the printer to remain within a predetermined range as a height of the part increases from about 0 mm to about 30 mm. The predetermined range is from about 545° C. to about 600° C. The heat control device includes a heat plate that is configured to generate heat in a downward direction toward the part.

A printer includes a heat control device configured to cause a temperature of a part that is printed by the printer to remain within a predetermined range as a height of the part increases from about 0 mm to about 30 mm. The predetermined range is from about 545° C. to about 600° C. The heat control device includes a heat plate that is configured to generate heat in a downward direction toward the part.

A printer includes a heat control device configured to cause a temperature of a part that is printed by the printer to remain within a predetermined range as a height of the part increases from about 0 mm to about 30 mm. The predetermined range is from about 545° C. to about 600° C. The heat control device includes a heat plate that is configured to generate heat in a downward direction toward the part.

The invention relates to a method for additive manufacture of a workpiece under protective gas, wherein a workpiece is assembled from a sequence of workpiece contours, each of which is manufactured by selective sintering or melting of a powdery or wire-like material by applying an energy beam thereto, wherein a workpiece contour is manufactured under the effect of a protective gas consisting of carbon dioxide and an inert gas. According to the invention, the chemical composition of each workpiece contour is modified according to a specified program by variation of the composition of the protective gas. Heat treatment occurring after manufacture of the workpiece contour provides for defined mechanical and technological quality values of the workpiece contour. A workpiece having zones with defined mechanical and technological quality values is produced in this manner.