RU2019113090A - Способ создания порошка кермета или цементированного карбида - Google Patents

Способ создания порошка кермета или цементированного карбида Download PDF

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RU2019113090A
RU2019113090A RU2019113090A RU2019113090A RU2019113090A RU 2019113090 A RU2019113090 A RU 2019113090A RU 2019113090 A RU2019113090 A RU 2019113090A RU 2019113090 A RU2019113090 A RU 2019113090A RU 2019113090 A RU2019113090 A RU 2019113090A
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spherically formed
powder
granules
dense
formed granules
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Карл-Йохан МАДЕРУД
Йохан СУНДСТРЕМ
Магнус ЭКЕЛУНД
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Сандвик Интеллекчуал Проперти Аб
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    • B22F3/12Both compacting and sintering
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    • B22F3/00Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
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    • B22F7/00Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
    • B22F7/06Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00Producing shaped articles from the material by using presses; Presses specially adapted therefor
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    • BPERFORMING OPERATIONS; TRANSPORTING
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    • C22C29/02Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
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    • C22C29/08Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
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    • C22C29/02Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
    • C22C29/06Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
    • C22C29/10Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on titanium carbide
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    • C22C29/16Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on nitrides
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Claims (13)

1. Способ создания порошка из плотных и сферически сформированных гранул кермета, который содержит стадии:
(a) формирование сферически сформированных гранул, содержащих металл, твердые составляющие и органическое связующее вещество;
(b) смешивание сферически сформированных гранул с порошком ингибитора спекания для формирования смеси сферически сформированных гранул и порошка ингибитора спекания;
(c) загрузка смеси сферически сформированных гранул и порошка ингибитора спекания в камеру печи;
(d) термическая обработка смеси, полученной на стадии (b), в камере печи при температуре спекания для удаления органического связующего вещества из сферически сформированных гранул и для спекания твердых составляющих частей с металлом в каждой сферически сформированной грануле, и тем самым для формирования смеси спеченных плотных сферически сформированных гранул и порошка ингибитора спекания;
(e) выгрузка смеси спеченных плотных сферически сформированных гранул и порошка ингибитора спекания из камеры печи; и
(f) отделение порошка ингибитора спекания от спеченных плотных сферически сформированных гранул, посредством чего формируют порошок из гранул плотного и сферически сформированного кермета,
причем порошок ингибитора спекания содержит оксид иттрия.
2. Способ по п. 1, в котором пористость внутри каждой плотной сферически сформированной гранулы кермета составляет менее чем 5 об.%.
3. Способ по п. 1 или 2, в котором размер спеченных плотных сферически сформированных гранул из порошка кермета составляет от 1 до 500 мкм.
4. Способ по любому из пп. 1-2, в котором термическая обработка в печной камере выполняется при температуре спекания выше температуры солидуса металла в сферически сформированных гранулах.
5. Способ по п. 4, в котором термическая обработка в печной камере выполняется при температуре спекания, которая превышает температуру солидуса металла в сферически сформированных гранулах на величину от 30°C до 100°C.
6. Способ по любому из предыдущих пунктов, в котором порошок ингибитора отделяется от спеченных плотных сферически сформированных гранул посредством физических способов, таких как просеивание, воздушная сепарация, гидроциклон, флотация и/или псевдоожижение.
RU2019113090A 2014-04-24 2015-04-23 Способ создания порошка кермета или цементированного карбида RU2019113090A (ru)

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JP2017519101A (ja) 2017-07-13
EP3134222B1 (en) 2018-05-23
US20170072469A1 (en) 2017-03-16
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