Hitachi Metals, Ltd.

Proterial, Ltd.

Jun Sunakawa

Yoshio Bizen

Shunsuke Arakawa

Hajime Itagaki

Michihiro Nagao

Hiroshi Shibasaki

Takayuki Motegi

Daichi Azuma

Nakao Moritsugu

A method for producing an Fe-based nanocrystalline alloy ribbon, the method including a step of supplying a molten Fe-based alloy onto a rotating chill roll, and rapidly solidifying the molten Fe-based alloy that has been supplied onto the chill roll, thereby obtaining an Fe-based amorphous alloy ribbon having a free solidified surface and a roll contact surface, and a step of heat-treating the Fe-based amorphous alloy ribbon, thereby obtaining an Fe-based nanocrystalline alloy ribbon; wherein an outer peripheral part of the chill roll is composed of a Cu alloy, and a thermal conductivity of the outer peripheral part is from 70 W/(m·K) to 225 W/(m·K).

Method for producing Fe-based nanocrystalline alloy ribbon, method for producing magnetic core, Fe-based nanocrystalline alloy ribbon, and magnetic core

A method of manufacturing an Fe-based amorphous alloy ribbon includes forming a coated film of a molten alloy on a peripheral surface of a chill roll that has been subjected to polishing using a polishing brush roll, cooling the coated film on the peripheral surface, and then winding the Fe-based amorphous alloy ribbon, which has been peeled off by a peeling means, on a wind-up roll, to obtain a wound body of an Fe-based amorphous alloy ribbon. The polishing brush roll includes a roll axis member and a polishing brush that is equipped with a plurality of brush bristles and satisfies the following condition (1) and condition (2) while rotating axially in a reverse direction to the chill roll.

Fe-based amorphous alloy ribbon manufacturing method, Fe-based amorphous alloy ribbon manufacturing device, and wound body of Fe-based amorphous alloy ribbon

The invention provides a method of producing an amorphous alloy ribbon, the method including a step of producing an amorphous alloy ribbon by discharging a molten alloy through a rectangular opening of a molten metal nozzle having a molten metal flow channel along which the molten alloy flows, the opening being an end of the molten metal flow channel, onto a surface of a rotating chill roll, in which, among wall surfaces of the molten metal flow channel, a maximum height Rz(t) of a surface t, which is a wall surface parallel to a flow direction of the molten alloy and to a short side direction of the opening, is 10.5 &#x3bc;m or less.

Amorphous alloy ribbon and method of producing the same

A resonator for use in a marker in an electronic article surveillance system having an amorphous alloy ribbon having a width of 7 mm or less and a thickness of 18 &#x3bc;m to 23 &#x3bc;m. The amorphous alloy ribbon preferably has an average surface roughness Ra of 0.45 &#x3bc;m or less.

Resonator for use in electronic article surveillance systems

An amorphous alloy ribbon free from embrittlement and crystallization and having excellent surface conditions and shape in edge portions is produced by (a) preparing an alloy melt having a composition comprising 13 atomic % or less of B and 15 atomic % or less of at least one selected from the group consisting of transition elements of Groups 4A, 5A and 6A, the balance being substantially Fe; (b) ejecting the alloy melt at a temperature from the melting point of the alloy &plus;50&deg; C. to the melting point of the alloy &plus;250&deg; C. through a nozzle onto the cooling roll rotating at a peripheral speed of 35 m/second or less, a distance between a tip end of the nozzle and the cooling roll being 200 &mgr;m or less; (c) starting to supply a gas based on CO to the alloy melt after the surface temperature of the cooling roll has become substantially constant; and (d) grinding the cooling roll while supplying the gas based on CO .

Method for producing amorphous alloy ribbon, and method for producing nano-crystalline alloy ribbon with same

The present invention provides a method for producing a Fe-based amorphous alloy ribbon comprising the steps of: ejecting a molten Fe-based alloy containing 10 atomic % or less of B onto a cooling roll to solidify the molten Fe-based alloy; and peeling the solidified Fe-based alloy from the cooling roll when the solidified Fe-based alloy has a temperature of 100 to 300&deg; C. A Fe-based amorphous alloy ribbon having no crystalline phase is stably, continuously produced without breakage by this method.

Methods for producing iron-based amorphous alloy ribbon and nanocrystalline material

A method for winding a rapidly quenched thin metal ribbon has the steps of (1) ejecting a molten metal onto a rotating cooling roll to rapidly solidify the molten metal to form a thin metal ribbon, (2) peeling the thin metal ribbon from the cooling roll to let the thin metal ribbon to freely move from the cooling roll, and (3) bringing a rotating winding roll having an adhesive thereon into contact with the freely moving thin metal ribbon at an intermediate point thereof, so that the thin metal ribbon is wound around the winding roll with an excess portion of the thin metal ribbon forward of the intermediate point cut off.

Method for winding rapidly quenched thin ribbon, apparatus for producing rapidly quenched thin ribbon, and rapidly quenched thin ribbon coil

There is provided a high-performance magnetic core with a high &mgr;&prime;Qf-value for an RF accelerating. The strip wound magnetic core has a thin strip of nanocrystalline soft magnetic alloy, whose bcc solid solution with an average grain size less than 100 nm has a volume fraction more than 50% of the whole structure of the alloy, and around which an interlayer insulation film at least on one side thereof. A gap is formed in at least a part of a magnetic path of the magnetic core. Stack cores formed by arranging in series a plurality of the magnetic cores are oppositely installed via a high-voltage gap, making it possible to provide an excellent RF accelerating cavity.

Growing community of inventors

Shimane-ken, Japan

Jun Sunakawa