JP6590833B2 - サーメット又は超硬合金粉末の作製方法 - Google Patents
サーメット又は超硬合金粉末の作製方法 Download PDFInfo
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Description
本明細書において、用語「サーメット」は、セラミック相すなわち硬質成分と、金属結合剤相とを含む材料を表すことを意図する。
(a)金属、硬質成分、及び有機結合剤を含む球状顆粒を形成する工程、
(b)前記球状顆粒を焼結阻害剤粉末と混合し、球状顆粒と焼結阻害剤粉末との混合物を形成する工程、
(c)球状顆粒と焼結阻害剤粉末との混合物を、炉室内にロード(load)する工程、
(d)工程(b)で得られた混合物を、炉室内で焼結温度で熱処理して、球状顆粒から有機結合剤を除去し、硬質成分を各球状顆粒中の金属と焼結することにより、焼結された緻密な球状顆粒と焼結阻害剤粉末との混合物を形成する工程、
(e)焼結された緻密な球状顆粒と焼結阻害剤粉末との混合物を、炉室からアンロード(unload)する工程、並びに
(f)焼結された緻密な球状顆粒から焼結阻害剤粉末を分離することにより、緻密な球状のサーメット又は超硬合金顆粒の粉末を形成する工程。
(a)上記又は下記に定める粉末を提供する工程、
(b)型を提供する工程、
(c)型を粉末で充填する工程、
(d)型から空気を排出する工程、
(e)型を密封する工程、
(f)上記又は下記に定める粉末が冶金結合するように、所定の温度、所定の圧力で、所定の期間、少なくとも1つの型に熱間等方圧加圧(HIP)を施す工程であって、固形物が形成される工程
を含み、
型がジルコニウム合金又はチタン合金製であることを特徴とする、
プロセスに関する。
WC、Co、Cr、PEG、及びエタノールの粉末を含むスラリから顆粒が形成された。WC及びCo粉末の平均粒径はそれぞれ、0.8μmと1.3μmであった。Niro噴霧乾燥機器でスラリが噴霧乾燥された。形成された噴霧乾燥顆粒は63μmネットでふるい分けされ、顆粒粉末のうち最小の部分のみが残った。
WC、Co、Cr、PEG、及びエタノールの粉末を含むスラリから顆粒が形成された。WC及びCo粉末の平均粒径はそれぞれ、0.8μm及び1.3μm(Fischer法)であった。Niro噴霧乾燥機器でスラリが噴霧乾燥された。顆粒粉末の最小の部分のみを使用するため、形成された球状顆粒は、63μmネットでふるい分けされた。
実施例2に記載の方法により製造された、約10−200μmの範囲内の粒度分布を有する粉末が、この場合、シンプルな底部のチューブの形態のジルコニウムグレード702製カプセル内に充填された。粉末のパッキング密度を最大化するためにタッピング操作下で充填が実施された(67vol%に到達した)。
Claims (10)
- 緻密な球状のサーメット又は超硬合金顆粒の粉末を作製する方法であって、
(a)金属、硬質成分、及び有機結合剤を含む球状顆粒を形成する工程、
(b)前記球状顆粒を焼結阻害剤粉末と混合し、球状顆粒と焼結阻害剤粉末との混合物を形成する工程、
(c)球状顆粒と焼結阻害剤粉末との混合物を炉室内にロードする工程、
(d)工程(b)で得られた混合物を、炉室内で焼結温度で熱処理して、球状顆粒から有機結合剤を除去し、硬質成分を各球状顆粒中の金属と焼結することにより、焼結された緻密な球状顆粒と焼結阻害剤粉末との混合物を形成する工程、
(e)焼結された緻密な球状顆粒と焼結阻害剤粉末との混合物を炉室からアンロードする工程、並びに
(f)焼結された緻密な球状顆粒から焼結阻害剤粉末を分離することにより、緻密な球状のサーメット又は超硬合金顆粒の粉末を形成する工程
を含む、方法。 - 各サーメット又は超硬合金の緻密な球状顆粒内部の気孔率が5vol%よりも低い、請求項1に記載の方法。
- サーメット又は超硬合金粉末の焼結された緻密な球状顆粒の顆粒サイズが、1から500μmである、請求項1又は2に記載の方法。
- 炉室内での熱処理が、球状顆粒中の金属の固相線温度を上回る焼結温度で実施される、請求項1から3のいずれか一項に記載の方法。
- 炉室内での熱処理が、球状顆粒中の金属の固相線温度を30から100℃上回る焼結温度で実施される、請求項4に記載の方法。
- 阻害剤粉末が酸化物を含む、請求項1から5のいずれか一項に記載の方法。
- 阻害剤粉末が炭素を含む、請求項1から5のいずれか一項に記載の方法。
- 阻害剤粉末が、焼結された緻密な球状顆粒から、ふるい分け、空気分級、液体サイクロン、浮遊式、及び/又は流動化などの物理的な方法を用いて分離される、請求項1から7のいずれか一項に記載の方法。
- 阻害剤粉末が、高温でガスを用いる熱化学的方法を用いて、焼結された緻密な球状顆粒から分離される、請求項7に記載の方法。
- 熱化学的方法が、回転式チューブ炉又は流動床炉内で実施される、請求項9に記載の方法。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14165842.7 | 2014-04-24 | ||
| EP14165842 | 2014-04-24 | ||
| PCT/EP2015/058790 WO2015162206A2 (en) | 2014-04-24 | 2015-04-23 | A method of making cermet or cemented carbide powder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2017519101A JP2017519101A (ja) | 2017-07-13 |
| JP6590833B2 true JP6590833B2 (ja) | 2019-10-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2016564005A Active JP6590833B2 (ja) | 2014-04-24 | 2015-04-23 | サーメット又は超硬合金粉末の作製方法 |
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| Country | Link |
|---|---|
| US (3) | US20170072469A1 (ja) |
| EP (1) | EP3134222B1 (ja) |
| JP (1) | JP6590833B2 (ja) |
| KR (1) | KR102297842B1 (ja) |
| CN (1) | CN106573298B (ja) |
| BR (1) | BR112016024706A2 (ja) |
| RU (2) | RU2687332C2 (ja) |
| WO (1) | WO2015162206A2 (ja) |
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| JP6764228B2 (ja) * | 2015-12-22 | 2020-09-30 | 株式会社フジミインコーポレーテッド | 粉末積層造形に用いるための造形用材料 |
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- 2015-04-23 BR BR112016024706A patent/BR112016024706A2/pt not_active Application Discontinuation
- 2015-04-23 CN CN201580020977.2A patent/CN106573298B/zh active Active
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| CN106573298B (zh) | 2019-03-05 |
| RU2019113090A (ru) | 2019-09-06 |
| US20170072469A1 (en) | 2017-03-16 |
| BR112016024706A2 (pt) | 2017-08-15 |
| KR20160146729A (ko) | 2016-12-21 |
| RU2016145399A3 (ja) | 2018-11-02 |
| KR102297842B1 (ko) | 2021-09-02 |
| RU2016145399A (ru) | 2018-05-24 |
| WO2015162206A3 (en) | 2015-12-17 |
| EP3134222B1 (en) | 2018-05-23 |
| RU2687332C2 (ru) | 2019-05-13 |
| US12383956B2 (en) | 2025-08-12 |
| US20200360995A1 (en) | 2020-11-19 |
| EP3134222A2 (en) | 2017-03-01 |
| US20220288683A1 (en) | 2022-09-15 |
| JP2017519101A (ja) | 2017-07-13 |
| CN106573298A (zh) | 2017-04-19 |
| WO2015162206A2 (en) | 2015-10-29 |
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