JP5284080B2 - 金属粉末およびそれを製造するための方法 - Google Patents
金属粉末およびそれを製造するための方法 Download PDFInfo
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- JP5284080B2 JP5284080B2 JP2008504200A JP2008504200A JP5284080B2 JP 5284080 B2 JP5284080 B2 JP 5284080B2 JP 2008504200 A JP2008504200 A JP 2008504200A JP 2008504200 A JP2008504200 A JP 2008504200A JP 5284080 B2 JP5284080 B2 JP 5284080B2
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- 239000000843 powder Substances 0.000 title claims description 101
- 229910052751 metal Inorganic materials 0.000 title claims description 90
- 239000002184 metal Substances 0.000 title claims description 90
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 238000000034 method Methods 0.000 claims description 74
- 239000000203 mixture Substances 0.000 claims description 49
- 239000002002 slurry Substances 0.000 claims description 49
- 239000011230 binding agent Substances 0.000 claims description 45
- 239000002245 particle Substances 0.000 claims description 35
- 239000002243 precursor Substances 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 28
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 9
- 230000005496 eutectics Effects 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000003870 refractory metal Substances 0.000 claims description 3
- 239000012798 spherical particle Substances 0.000 claims description 2
- 239000000047 product Substances 0.000 description 65
- 230000008569 process Effects 0.000 description 52
- 238000009472 formulation Methods 0.000 description 31
- 239000007789 gas Substances 0.000 description 24
- 238000002485 combustion reaction Methods 0.000 description 18
- 238000001694 spray drying Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000002844 melting Methods 0.000 description 12
- 230000008018 melting Effects 0.000 description 12
- 239000012255 powdered metal Substances 0.000 description 12
- 239000007787 solid Substances 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 description 9
- 238000009826 distribution Methods 0.000 description 9
- 229920002451 polyvinyl alcohol Polymers 0.000 description 9
- 239000012467 final product Substances 0.000 description 8
- 239000000446 fuel Substances 0.000 description 7
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 239000011733 molybdenum Substances 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- 239000007858 starting material Substances 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 4
- 238000000280 densification Methods 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010902 jet-milling Methods 0.000 description 3
- 239000012705 liquid precursor Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000006199 nebulizer Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 2
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- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
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- 238000005245 sintering Methods 0.000 description 2
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- 150000001298 alcohols Chemical class 0.000 description 1
- 230000002902 bimodal effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/026—Spray drying of solutions or suspensions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/107—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing organic material comprising solvents, e.g. for slip casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
- B22F1/108—Mixtures obtained by warm mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
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- Manufacture And Refinement Of Metals (AREA)
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Description
本発明は概して金属粉末に関し、より具体的には金属粉末を製造するためのプロセスに関する。
粉末化した金属製品を製造するための幾つかの異なるプロセスが開発されていて、これらは現在、高い密度や高い流動性などの特定の特性を有する金属粉末を製造するために用いられているが、そのような特性は、例えば焼結やプラズマ溶射のプロセスなど、その後の冶金的加工処理において望ましいものである。
本発明によれば、金属粉末製品を製造するための方法であって:
先駆金属粉末の供給物を用意すること;
前記先駆金属粉末を液体及び結合剤と混合してスラリーを形成すること;および
前記スラリーを熱ガスの脈動流の中に霧化して実質的に中実で概ね球形の小さな粒子を含む概ね球形の凝集粒子を含む金属粉末製品を製造すること;
を含み、
前記スラリーは重量で0.01%と5%の間の結合剤を含み、
前記概ね球形の凝集粒子は10μmから100μmまでの範囲の粒子サイズを有し、
前記概ね球形の凝集粒子は前記小さな粒子の粒子サイズよりも10倍大きな粒子サイズを有する、前記方法が提供される。
詳細な説明
金属粉末製品を製造するための方法10が図1に示され、これは工程12において、先駆金属粉末の供給物を用意することと、先駆金属粉末を液体と混合してスラリーを形成することを含む。次いで、スラリーは熱ガス14の脈動流の中に供給される。一つの態様において、熱ガスの脈動流はパルス燃焼装置100によって生成される(図2)。次いで、金属粉末製品は工程16において回収される。以下でもっと詳しく説明するが、回収された金属粉末製品は、通常の噴霧乾燥プロセスによって製造される金属粉末と比較して、高い密度と高い流動性を有する小さな粒子の凝集物を含む。
本発明による幾つかの例が、約5〜6μmの範囲の大きさを有する先駆金属粉末としてのモリブデン粉末を用いて実施された。ここで説明しているように、最初の工程は工程12におけるスラリーの形成を含む(図1および図3〜5を参照)。この場合、水と結合剤の混合物が最初に作られた。次いで、得られた混合物は約71℃(約1600F)の温度に加熱されて、水の中の結合剤からなる望ましい分散液が用意されたが、この第一の実施例における結合剤はポリビニルアルコール(PVA)である。この混合物は、透明になるまで加熱された。次いで、約5〜6μmの大きさの範囲の粒子を含むモリブデン先駆金属粉末が、この加熱された水と結合剤の混合物に添加され(混合物は金属を添加する前かまたは添加する間に冷却されてもよい)、そして攪拌されて、それにより約80wt.%の固体分と約20wt.%の水と結合剤の液体とを含むスラリーが形成されたが、このとき全体の約0.1wt.%〜約1.0wt.%が結合剤であった(すなわち、約19wt.%〜約19.9wt.%が水であった)。以下でさらに説明するように、約0.4wt.%〜約0.8wt.%が結合剤であるのが好ましい。
Claims (11)
- 金属粉末製品を製造するための方法であって:
先駆金属粉末の供給物を用意すること;
前記先駆金属粉末を液体及び結合剤と混合してスラリーを形成すること;および
前記スラリーを熱ガスの脈動流の中に霧化して実質的に中実で概ね球形の小さな粒子を含む概ね球形の凝集粒子を含む金属粉末製品を製造すること;
を含み、
前記スラリーは重量で0.01%と5%の間の結合剤を含み、
前記概ね球形の凝集粒子は10μmから100μmまでの範囲の粒子サイズを有し、
前記概ね球形の凝集粒子は前記小さな粒子の粒子サイズよりも10倍大きな粒子サイズを有する、前記方法。 - 前記スラリーは重量で60%と99%の間の金属粉末材料を含む、請求項1に記載の方法。
- 先駆金属粉末の供給物を用意することは、1μmから20μmまでの範囲の大きさを有する先駆金属粉末の供給物を用意することを含む、請求項1〜2のいずれかに記載の方法。
- 先駆金属粉末の供給物を用意することは、共晶金属粉末、非共晶金属粉末、耐熱性金属粉末、およびこれらの混合物からなる群から選択される先駆金属粉末の供給物を用意することを含む、請求項1〜3のいずれかに記載の方法。
- 先駆金属粉末の供給物を用意することは、モリブデン金属粉末の供給物を用意することを含む、請求項1〜4のいずれかに記載の方法。
- 請求項1に記載の方法に従って製造された金属粉末製品。
- 50グラムに対して30秒未満のホール流動性を有する請求項6に記載の金属粉末製品。
- 前記金属粉末製品はモリブデン金属粉末を含む、請求項6または7に記載の金属粉末製品。
- 前記モリブデン金属粉末は1g/ccから4g/ccの範囲のスコット密度を有する、請求項8に記載の金属粉末製品。
- 前記モリブデン金属粉末は2.6g/ccから2.9g/ccの範囲のスコット密度を有する、請求項8に記載の金属粉末製品。
- 前記概ね球形の凝集粒子は44μmから76μmまでの範囲の粒子サイズを含む、請求項6〜10のいずれかに記載の金属粉末製品。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US11/092,023 | 2005-03-29 | ||
US11/092,023 US7470307B2 (en) | 2005-03-29 | 2005-03-29 | Metal powders and methods for producing the same |
PCT/US2006/010883 WO2006104925A2 (en) | 2005-03-29 | 2006-03-24 | Metal powders and methods for producing the same |
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JP2008534783A JP2008534783A (ja) | 2008-08-28 |
JP5284080B2 true JP5284080B2 (ja) | 2013-09-11 |
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JP2008504200A Expired - Fee Related JP5284080B2 (ja) | 2005-03-29 | 2006-03-24 | 金属粉末およびそれを製造するための方法 |
Country Status (5)
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US (3) | US7470307B2 (ja) |
JP (1) | JP5284080B2 (ja) |
DE (1) | DE112006000689B4 (ja) |
GB (3) | GB2473771B (ja) |
WO (1) | WO2006104925A2 (ja) |
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US7470307B2 (en) * | 2005-03-29 | 2008-12-30 | Climax Engineered Materials, Llc | Metal powders and methods for producing the same |
DE102007024360A1 (de) * | 2007-05-24 | 2008-11-27 | Dorst Technologies Gmbh & Co. Kg | Anordnung bzw. Verfahren zum Herstellen eines Metallspritzgießpulvers und/oder Metallspritzgießgranulats |
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GB2473770A (en) | 2011-03-23 |
US7470307B2 (en) | 2008-12-30 |
DE112006000689T5 (de) | 2008-02-07 |
GB2473771A (en) | 2011-03-23 |
WO2006104925A3 (en) | 2008-01-17 |
GB201021077D0 (en) | 2011-01-26 |
JP2008534783A (ja) | 2008-08-28 |
GB0718170D0 (en) | 2007-10-31 |
GB2473771B (en) | 2011-10-05 |
US20080264204A1 (en) | 2008-10-30 |
US7824465B2 (en) | 2010-11-02 |
US20080271567A1 (en) | 2008-11-06 |
WO2006104925A2 (en) | 2006-10-05 |
GB2438357B (en) | 2010-10-27 |
US8206485B2 (en) | 2012-06-26 |
DE112006000689B4 (de) | 2020-07-23 |
US20060219056A1 (en) | 2006-10-05 |
GB2438357A (en) | 2007-11-21 |
GB201021076D0 (en) | 2011-01-26 |
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