JP6774135B2 - クロム被覆を製造する方法および被覆物体 - Google Patents
クロム被覆を製造する方法および被覆物体 Download PDFInfo
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Description
本発明の目的は、従来技術の直面する問題を排除することまたは少なくとも減らすことである。
いくつかの鋼物体を7μmのNiP層および4μmのCr層で被覆し、その後、被覆物体に二重熱処理シーケンスを行った。第一加熱ステップは、200℃〜700℃の間の温度で30分間または45分間行い、その後、被覆物体を冷却した。同じサンプルの第二加熱ステップは、400℃〜700℃の間の温度で5〜30分間行い、その後、被覆物体を再び冷却した。
鋼物体を、7μmのNiP層および4μmのCr層で被覆した。熱処理を、二つのステップで行った。第一ステップは400℃で45分かけ、第二ステップは700℃で30分かけた。
‐Feリッチな層(鋼基質)、
‐FeおよびNiを主に含む層、
‐NiおよびPを主に含む層、
‐NiおよびCrを主に含む層、
‐CrおよびOを主に含む層、
‐CrおよびCを主に含む層。
別の鋼物体を、7μmのNiP層および4μmのCr層を含む、実施例2と類似の被覆で被覆した。熱処理を、400℃で30分の第一ステップ、および700℃で30分の第二ステップの二つのステップで行った。
‐Feリッチな層(鋼基質)、
‐FeおよびNiを主に含む層、
‐NiおよびPを主に含む層、
‐NiおよびCrを主に含む層、
‐CrおよびOを主に含む層、
‐CrおよびCを主に含む層。
斜入射回折(GID:grazing incidence diffraction)を用いて、被覆表面の相構造の表面付近の深さプロフィールを得た。結果を図5に示す。最下は従来のXRDスペクトルである。入射角1.2°、5.5°および8.5°は、被覆の異なる深さを表す。測定されたスペクトルを被覆物体に含まれることが既知の元素のスペクトルと比較することによって、異なる入射角で測定したXRDスペクトルのピークを同定した。
硬化可能なまたは表面硬化された金属物体を、1μmのストライクニッケル層、3μmのNiP層および4μmのCr層で被覆した。被覆の総厚みは、約8μmであった。その後、物体を誘導加熱によって一つのステップで熱処理した。
硬化可能な金属物体を、1μmのストライクニッケル層、3μmのNiP層および4μmのCr層で被覆した。被覆の総厚みは、約8μmであった。その後、物体を誘導加熱によって熱処理した。
表面硬化した金属物体を、1μmの第一ストライクニッケル層、3μmの第一NiP層、4μmの第一Cr層、1μmの第二ストライクニッケル層、3μmの第二NiP層および4μmの第二Cr層で被覆した。被覆の総厚みは、約16μmであった。その後、物体を誘導加熱によって熱処理した。
物体を、7μmのNiP層および5μmのCr層で被覆した。被覆物体を、700℃で30分間加熱した。その後、薄膜堆積によってDLC(ダイヤモンドライクカーボン)の最上層を被覆物体上に堆積させた。
Claims (22)
- 三価クロムめっきによって物体上にクロム被覆を製造する方法であって、
‐前記物体上にニッケルリン合金(NiP)の層を堆積するステップと、
‐前記NiP層上に中間層を堆積するステップであって、前記中間層は、他の金属もしくは金属合金またはセラミックからなる、ステップと、
‐前記中間層上に三価クロム浴からクロムの層を堆積するステップと、
‐前記被覆を硬化し、前記NiP層に由来し、結晶性Niと結晶性Ni3Pとを含む少なくとも一つの層と、前記クロム層に由来し、結晶性Crを含む少なくとも一つの層とを含む多相層を製造するために、前記被覆物体に一つ以上の熱処理を行うステップと、
を含む、方法。 - 前記中間層は、銅または銅の合金を含む、請求項1に記載の方法。
- 前記中間層は、モリブデンまたはモリブデンの合金を含む、請求項1に記載の方法。
- 前記中間層は、金属酸化物、金属炭化物、金属ホウ化物、金属窒化物、金属ケイ化物およびそれらの混合物を含む群より選択される無機非金属固体を含む、請求項1に記載の方法。
- 前記NiP層を堆積させる前に、前記物体上にニッケルストライク層を堆積するステップをさらに含む、請求項1〜4のいずれか一項に記載の方法。
- 前記NiP合金のリン含量は、1〜15w%である、請求項1〜5のいずれか一項に記載の方法。
- 前記一つ以上の熱処理の温度は、200〜1000℃である、請求項1〜6のいずれか一項に記載の方法。
- 前記被覆物体は、二つ以上の熱処理が行われ、各熱処理の後に冷却される、請求項1〜7のいずれか一項に記載の方法。
- 前記熱処理のうちの少なくとも一つは、500〜700℃の間の温度で行われる、請求項8のいずれか一項に記載の方法。
- 第一熱処理の温度は、200〜500℃であり、第二熱処理の温度は、500〜800℃である、請求項8に記載の方法。
- 第一熱処理の温度は、500〜800℃であり、第二熱処理の温度は、200〜500℃である、請求項8に記載の方法。
- 被覆されるべき前記物体は金属の物体であり、前記物体の前記金属の硬化は、前記被覆物体が熱処理されるのと同時に行われる、請求項1〜11のいずれか一項に記載の方法。
- NiPの少なくとも二つの層と、Crの少なくとも二つの層と、少なくとも一つの中間層とを含む多層被覆を製造するために、前記堆積するステップを二回以上繰り返し、その後、前記多層被覆物体に、一つ以上の熱処理が行われるステップを含む、請求項1〜12のいずれか一項に記載の方法。
- 薄膜堆積によって、前記被覆および熱処理された物体上に最上層を堆積するステップをさらに含む、請求項1〜13のいずれか一項に記載の方法。
- 前記被覆物体に一つ以上の熱処理を行う前記ステップの前に、薄膜堆積によって、前記被覆物体上に最上層を堆積するステップをさらに含む、請求項1〜13のいずれか一項に記載の方法。
- 請求項1〜15のいずれか一項に記載の方法を使用して被覆された物体であって、前記被覆は、結晶性Niと結晶性Ni3Pとを含む多相層と、他の金属もしくは金属合金またはセラミックを含む中間層と、結晶性Crを含む多相層とを含む、被覆物体。
- 前記中間層は、銅または銅の合金からなる、請求項16に記載の被覆物体。
- 前記中間層は、モリブデンまたはモリブデンの合金からなる、請求項16に記載の被覆物体。
- 前記中間層は、金属酸化物、金属炭化物、金属ホウ化物、金属窒化物、金属ケイ化物およびそれらの混合物を含む群より選択される無機非金属固体を含む、請求項16に記載の被覆物体。
- 薄膜堆積によって前記被覆物体上に施された最上層を含む、請求項16〜19のいずれか一項に記載の被覆物体。
- 前記最上層は、金属、金属合金、セラミック、またはダイヤモンドライクカーボンからなる、請求項20に記載の被覆物体。
- 2000HVより高いビッカース微小硬度値を有する、請求項16〜21のいずれか一項に記載の被覆物体。
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WO2015107255A1 (en) | 2014-01-15 | 2015-07-23 | Savroc Ltd | Method for producing chromium-containing multilayer coating and a coated object |
US10487412B2 (en) | 2014-07-11 | 2019-11-26 | Savroc Ltd | Chromium-containing coating, a method for its production and a coated object |
WO2017042420A1 (en) | 2015-09-09 | 2017-03-16 | Savroc Ltd | Chromium-based coating, a method for producing a chromium-based coating and a coated object |
DE102016004913A1 (de) * | 2016-04-22 | 2017-10-26 | Grohe Ag | Verfahren zur Beschichtung eines Gegenstands mittels eines Mehrschichtsystems mit einer Nickel-Phosphor-Legierung |
CN106906496A (zh) * | 2017-03-24 | 2017-06-30 | 武汉迪赛环保新材料股份有限公司 | 一种在钢铁表面制备三价铬电镀涂层的方法 |
CN106929892A (zh) * | 2017-04-10 | 2017-07-07 | 武汉迪赛新材料有限公司 | 一种高耐蚀性高硬度三价铬硬铬镀层的制备方法 |
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