JP2008524444A - 内燃エンジン用部品への耐高温劣化性の付与 - Google Patents
内燃エンジン用部品への耐高温劣化性の付与 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/18—Solid state diffusion of only metal elements or silicon into metallic material surfaces using liquids, e.g. salt baths, liquid suspensions
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
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Abstract
Description
従って簡潔にいえば、本発明は内燃エンジンに関連する部品に耐高温劣化性を付与する方法に関する。前記方法は、前記部品の表面に、Co基金属成分(又はCo系金属成分)、バインダー及び溶媒を含む金属スラリーを塗布(又は塗工)し、前記Co基金属成分を焼結して、実質的に連続的なCo基合金被覆を本体(ボディー又は物体)の表面に施す方法である。
合金粉体:約30〜60重両%
バインダー:約0.5〜約5重量%
溶媒:約40〜約70重量%
合金粉体:約41重量%
バインダー:約0.75重量%
溶媒:約58.25重量%
摩耗試験は、本発明の方法により被覆されたピンと中実タイルとの摩擦対を準備して行った。前記ピンは長さが0.75インチ(2cm)、直径が0.25インチ(0.6cm)であった。前記タイルは1.25インチ(3cm)×1.25インチ(3cm)×0.25インチ(0.6cm)であった。前記ピンの長手方向端部を、600℃の静的空気炉中に14.05Nの力で前記タイルに押しつけた。前記ピンを前記タイル面に垂直な軸の周りに1Hzの周期で60分間回転させた。前記タイルの表面荒さ(Ra)を測定し、これを摩耗による表面損傷の指標(摩耗指標)とした。表面荒さが荒くなる程、より多量の材料の移動を示す。
公称成分B−0.15%、Cr−17%、Mo−28%、Si−3.25%及び残部CoのT−800について後方散乱電子像顕微鏡写真を撮影し、図7(150倍)及び図8(500倍)に示す。基材には416ステンレス鋼を使用した。Mo濃度の高いことを示す明るい粒子はラーベス相である。有利な点は、これらの粒子が均一に分散し、また鋳造物(castings)にしばしば見られるような細長く不規則形状をした粒子が認められない点にある。特に、図7及び図8に示すミクロ組織は、図3及び図4のミクロ組織と同様に、一般に非デンドライト、不規則球状、ノジュラー状の金属間相である高濃度のMoを含むラーベス相を含む。このミクロ組織が本発明による、公称成分B−0.15%、Cr−17%、Mo−28%、Si−3.25%及び残部CoのT−800被覆の延性改善に貢献する。
416ステンレス鋼基材上にT−800被覆試料を二つ準備した。一つは本発明の被覆方法により、またもう一つはHVOF(高速オキシ燃料;high velocity oxyfuel)熱溶射被覆法により被覆試料を作製した。これら同一の厚さを有する二種類の被覆に同一の力で圧痕を形成した。HVOF熱溶射法により被覆した試料は圧痕で割れが発生した(図9)が、本発明の方法により被覆した試料(図10)には割れは認められず、延性が大幅に改善されていることが実証された。
Claims (20)
- 内燃エンジンに関連する部品に耐高温劣化性を付与する方法であって、
前記部品の表面に、Co基金属成分、バインダー及び溶媒を含んで成る金属スラリーを塗布すること;及び
前記Co基金属成分を焼結して、実質的に連続的なCo基合金被覆を、部品の表面に形成すること
を含んで成る方法。 - 金属スラリーは、約30〜約60重量%の金属粉体、約0.5〜約5重量%のバインダー、及び約40〜約70重量%の溶媒を含んで成る請求項1に記載の方法。
- 内燃エンジンに関連する部品に耐高温劣化性を付与する方法であって、
約30〜約60重量%のCo基金属成分、約0.5〜約5重量%のバインダー、約40〜約70重量%の溶媒を含んで成る金属スラリーを、部品の表面に塗布すること;及び
加熱して前記溶媒及び前記バインダーを除去し、前記Co基金属成分を焼結して、実質的に連続的なCo基合金被覆を、部品の表面に形成すること
を含んで成る方法であり、
前記Co基合金被覆は、一般に、非デンドライト状、不規則球状、ノジュラー状の金属間相により特徴づけられるミクロ組織を有する方法。 - Co基合金は、B、Cr、Mo、Si、C、及びCoを含んで成る請求項1〜3のいずれかに記載の方法。
- Co基合金被覆は、一般に、非デンドライト状、不規則球状、ノジュラー状の金属間相により特徴づけられるミクロ組織を有する請求項1又は2に記載の方法。
- Co基合金は、約0.05〜約0.5重量%のB、約5〜約20重量%のCr、約22〜約32重量%のMo、約1〜約4重量%のSi及び残部Coを含んで成る請求項1〜5のいずれかに記載の方法。
- Co基合金は、約B−0.15重量%,Cr−8.5重量%、Mo−28重量%、Si−2.6重量%、及び残部Coを含んで成る請求項1〜5のいずれかに記載の方法。
- Co基合金は、約B−0.15重量%、Cr−17重量%、Mo−28重量%、Si−3.25重量%及び残部Coを含んで成る請求項1〜5のいずれかに記載の方法。
- Co基合金は、約B−0.15重量%、Cr−14重量%、Mo−26重量%、Si−2.6重量%、及び残部Coを含んで成る請求項1〜5のいずれかに記載の方法。
- Co基合金は、B、Cr、W、Si、C、及びCoを含んで成る請求項1又は2に記載の方法。
- Co基合金は、約0.05〜約0.5重量%のB、約25〜約33重量%のCr、約0.5〜約3重量%のSi、及び約15重量%までのWを含んで成る請求項1又は2に記載の方法。
- Co基合金は、約0.05〜約0.5重量%のB、約1.2重量%のC、約28重量%のCr、約1.1重量%のSi、及び約4.5重量%のW、及び残部Coを含んで成る請求項1又は2に記載の方法。
- Co基合金は、約0.05〜約0.5重量%のB、約1.4〜約1.85重量%のC、約29.5重量%のCr、約1.5重量%のSi、及び約8.5重量%のW、及び残部Coを含んで成る請求項1又は2に記載の方法。
- Co基合金は、約0.05〜約0.5重量%のB、約2.45重量%のC、約31重量%のCr、約1重量%のSi、及び約13重量%のW、及び残部Coを含んで成る請求項1又は2に記載の方法。
- 金属製基材及び請求項1〜14のいずれかに記載の方法によってその金属製基材上に形成されたCo基合金被覆を含んで成る内燃エンジン部品。
- 金属基材とその上のCo基合金被覆を含んで成る内燃エンジン部品であって、
Co基合金被覆は、約100〜約1000ミクロンの厚さを有し、かつ、一般に、非デンドライト状、不規則球状、ノジュラー状の金属間相により特徴づけられるミクロ組織を有するCo基合金である内燃エンジン部品。 - Co基合金は、約0.05〜約0.5重量%のB、約5〜約20重量%のCr、約22〜約32重量%のMo、約1〜約4重量%のSi及び残部Coを含んで成る請求項16に記載の内燃エンジン部品。
- Co基合金は、約B−0.15重量%,Cr−8.5重量%、Mo−28重量%、Si−2.6重量%、及び残部Coを含んで成る請求項16に記載の内燃エンジン部品。
- Co基合金は、約B−0.15重量%、Cr−17重量%、Mo−28重量%、Si−3.25重量%及び残部Coを含んで成る請求項16に記載の内燃エンジン部品。
- Co基合金は、約B−0.15重量%、Cr−14重量%、Mo−26重量%、Si−2.6重量%、及び残部Coを含んで成る請求項16に記載の内燃エンジン部品。
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US63639804P | 2004-12-15 | 2004-12-15 | |
US60/636,398 | 2004-12-15 | ||
PCT/US2005/045318 WO2006065939A1 (en) | 2004-12-15 | 2005-12-15 | Imparting high-temperature degradation resistance to components for internal combustion engine systems |
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EP (1) | EP1844182B1 (ja) |
JP (1) | JP4866860B2 (ja) |
AT (1) | ATE478977T1 (ja) |
CA (1) | CA2595712C (ja) |
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- 2005-12-15 EP EP05854103A patent/EP1844182B1/en active Active
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CA2595712A1 (en) | 2006-06-22 |
CA2595712C (en) | 2014-07-29 |
US8383203B2 (en) | 2013-02-26 |
WO2006065939A9 (en) | 2006-08-17 |
ATE478977T1 (de) | 2010-09-15 |
US20130129926A1 (en) | 2013-05-23 |
US20060134455A1 (en) | 2006-06-22 |
JP4866860B2 (ja) | 2012-02-01 |
EP1844182B1 (en) | 2010-08-25 |
EP1844182A1 (en) | 2007-10-17 |
US20140147595A1 (en) | 2014-05-29 |
DE602005023218D1 (de) | 2010-10-07 |
US8668959B2 (en) | 2014-03-11 |
WO2006065939A1 (en) | 2006-06-22 |
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