Fukuda Metal Foil & Powder Co., Ltd.

Daihen Corporation

Technology Research Association for Future Additive Manufacturing

Motonori Nishida

Akira Okamoto

Ryusuke Tsubota

Yohei Oka

Junichi Tanaka

Takeshi Maruyama

Masato Kikukawa

Hiroaki Okubo

Yoshito Nishizawa

Takeshi Fukuda

Kensuke Hidaka

Yuji Sugitani

Akira Takagi

Osamu Kajita

Yoshio Kohira

Seiichi Matsumoto

Tamiho Mizutani

Toshiki Ohnishi

This invention relates to a method of evaluating a squeegeeing property of powder for lamination shaping by stable criteria. In this method, the squeegeeing property is evaluated using at least a satellite adhesion ratio of the powder and an apparent density of the powder. The satellite adhesion ratio is the ratio of the number of particles on which satellites are adhered to the number of all particles. If the satellite adhesion ratio is equal to or less than 50%, and the apparent density is equal to or more than 3.5 g/cm, the squeegeeing property is evaluated as that the powder can be spread into a uniform powder layer in the lamination shaping. Furthermore, if the 50% particle size of a powder obtained by a laser diffraction method is 3 to 250 &#x3bc;m, the squeegeeing property is evaluated as that the powder can be spread into a uniform powder layer in the lamination shaping.

Lamination shaping powder evaluation method and lamination shaping powder therefor

A metal powder for additive manufacturing includes: not less than 0.2 mass % and not more than 1.3 mass % of aluminum; and a balance including copper and an incidental impurity.

Metal powder, method of producing additively-manufactured article, and additively-manufactured article

The invention provides a process for producing vanadium alloy foil suitable as a membrane in a hydrogen-refining unit. A vanadium alloy comprising 5 to 25% by weight of at least one selected from the group consisting of Ni, Co, Mo, Fe and Ag, 0.01 to 5% by weight of at least one selected from the group consisting of Ti, Zr and Y, and the balance being V is used. A melt of the vanadium alloy is prepared by use of a crucible having slit in the bottom, a roll comprising a cylinder whose central axis is arranged to be parallel to the slit is rotated, the melt is jetted from the slit to the roll surface the melt is jetted from the slit is rapidly cooled, and the vanadium alloy solidified on the roll surface is continuously exfolitated from the roll surface to obtain the foil.

Process for producing vanadium alloy foil

There is provided a ball mill having a milling chamber into which metal powder is fed. The ball mill is also provided with milling means for milling metal powder into fine metal powder having a particle size less than a predetermined size. When the ball mill operates, a quantity of heat (Q,) is generated in the milling chamber. The milling chamber is cooled by liquid cooling means and gas cooling means according to the present invention. The liquid cooling means causes cooling liquid to flow along the outside wall of the milling chamber to remove a quantity of heat (Q,) during the ball mill operation. The gas cooling means causes cooling gas to flow through the milling chamber to remove a quantity of heat (Q,) during the ball mill operation. The generated quantity of heat (Q,) can be counterbalanced with the sum of the removed quantities of heat (Q,) and (Q,) so as to prevent the inside of the milling chamber from overheating, so that the ball mill can operate in the condition of Q,/V&gE;0.05 kW/l, where V is the inner volume of the milling chamber.

Ball mill, a method for preparing fine metal powder, and fine metal powder prepared by the method

Growing community of inventors

Kyoto, Japan

Motonori Nishida