WO2019111951A1 - アトマイズ金属粉末の製造方法 - Google Patents
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Abstract
Description
前記高圧水が前記溶融金属に衝突する際の衝突圧を20MPa以上とし、
前記高圧水が前記溶融金属との衝突面で亜臨界状態または超臨界状態になるように、前記溶融金属の温度及び/又は前記高圧水の温度を調整するアトマイズ金属粉末の製造方法。
[6]前記亜臨界状態は、圧力が0.5~22MPa、かつ、水温が150~274℃であり、前記超臨界状態は、圧力が22MPa以上、かつ、水温が374℃以上である[1]~[5]のいずれかに記載のアトマイズ金属粉末の製造方法。
(i)Fe76%-Si9%-B10%-P5%
(ii)Fe78%-Si9%-B9%-P4%
(iii)Fe80%-Si8%-B8%-P4%
(iv)Fe82.8%-B11%-P5%-Cu1.2%
(v)Fe84.8%-Si4%-B10%-Cu1.2%
(vi)Fe69.8%-Co15%-B10%-P4%-Cu1.2%
(vii)Fe69.8%-Ni1.2%-Co15%-B9.4%-P3.4%-Cu1.2%
(i)~(vii)は、各目的の配合となるように調整したが、実際の組成については、溶解してアトマイズが終了した時点で、±0.3at%程度の誤差や、その他不純物が含まれる場合がある。また、溶解中、アトマイズ中、アトマイズ後において酸化等により多少の組成の変化が現れることもある。
τ=Kλ/βcosθ (シェラーの式)
また得られた粉末の磁性特性はVSM(振動型磁力計)によって調査し、VSMによって得られたB-H線図(図6)から、飽和磁束密度をC点(F点)、保持力をE点、透磁率をBの最大傾き、損失をヒステリシスの面積(C-D-F-G)で求めた。なお、図6は、国立研究開発法人 科学技術振興機構(JST)より一般公開されている(インターネットURL:https://www.jst.go.jp/pr/report/report27/grf2.html 検索日2017年11月16日)。
3 溶融金属
4 溶融金属注入ノズル
5 ノズルヘッダー
6 冷却用ノズル
8 金属粉末
14 アトマイズ装置
15 冷却水タンク
16 冷却水用温度調節機
17 アトマイズ冷却水用高圧ポンプ
18 アトマイズ冷却水用配管
20 冷却水
51 衝突圧測定圧力センサー
Claims (6)
- 鉛直方向に落下する溶融金属に高圧水を噴射して衝突させ、該溶融金属を分断して金属粉末とし、かつその金属粉末を冷却し、非晶質化率が90%以上のアトマイズ金属粉末を製造する方法であって、
前記高圧水が前記溶融金属に衝突する際の衝突圧を20MPa以上とし、
前記高圧水が前記溶融金属との衝突面で亜臨界状態または超臨界状態になるように、前記溶融金属の温度及び/又は前記高圧水の温度を調整するアトマイズ金属粉末の製造方法。 - 前記高圧水と前記溶融金属との衝突時において、前記溶融金属の温度と前記高圧水の温度との平均温度を374℃以上とする請求項1に記載のアトマイズ金属粉末の製造方法。
- 前記溶融金属の単位時間当たりの落下量をQm(kg/min)、前記高圧水の単位時間当たりの噴射量をQaq(kg/min)としたときに、質量比(Qaq/Qm)が35以上である請求項1又は2に記載のアトマイズ金属粉末の製造方法。
- 前記アトマイズ金属粉末は、鉄系成分(Fe、Ni、Co)の合計含有量が原子分率で76.0at%以上であり、Cuの含有量が原子分率で0.1at%以上2.0at%以下である請求項1~3のいずれかに記載のアトマイズ金属粉末の製造方法。
- 前記アトマイズ金属粉末は、鉄系成分(Fe、Ni、Co)の合計含有量が原子分率で82.5at%を超え86.0at%未満であり、Si、P及びBから選ばれる少なくとも2種とCuを含有し、平均粒径が5μm以上である請求項1~3のいずれかに記載のアトマイズ金属粉末の製造方法。
- 前記亜臨界状態は、圧力が0.5~22MPa、かつ、水温が150~274℃であり、
前記超臨界状態は、圧力が22MPa以上、かつ、水温が374℃以上である請求項1~5のいずれかに記載のアトマイズ金属粉末の製造方法。
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CA3084963A CA3084963C (en) | 2017-12-07 | 2018-12-05 | Method for manufacturing atomized metal powder |
CN201880078464.0A CN111432964A (zh) | 2017-12-07 | 2018-12-05 | 雾化金属粉末的制造方法 |
KR1020207016126A KR102455104B1 (ko) | 2017-12-07 | 2018-12-05 | 아토마이즈 금속 분말의 제조 방법 |
JP2019507867A JP6575723B1 (ja) | 2017-12-07 | 2018-12-05 | アトマイズ金属粉末の製造方法 |
US16/769,611 US20200316688A1 (en) | 2017-12-07 | 2018-12-05 | Method for manufacturing atomized metal powder |
EP18885010.1A EP3722028A4 (en) | 2017-12-07 | 2018-12-05 | ATOMIZED METAL POWDER PRODUCTION PROCESS |
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US20200316688A1 (en) | 2020-10-08 |
EP3722028A4 (en) | 2020-11-18 |
KR20200078630A (ko) | 2020-07-01 |
CA3084963C (en) | 2022-05-03 |
JP6575723B1 (ja) | 2019-09-18 |
EP3722028A1 (en) | 2020-10-14 |
KR102455104B1 (ko) | 2022-10-14 |
CN111432964A (zh) | 2020-07-17 |
CA3084963A1 (en) | 2019-06-13 |
JPWO2019111951A1 (ja) | 2019-12-12 |
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