JP3330828B2 - Heat-resistant and corrosion-resistant protective coating layer - Google Patents
Heat-resistant and corrosion-resistant protective coating layerInfo
- Publication number
- JP3330828B2 JP3330828B2 JP26245396A JP26245396A JP3330828B2 JP 3330828 B2 JP3330828 B2 JP 3330828B2 JP 26245396 A JP26245396 A JP 26245396A JP 26245396 A JP26245396 A JP 26245396A JP 3330828 B2 JP3330828 B2 JP 3330828B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- protective coating
- coating layer
- resistant
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
- Physical Vapour Deposition (AREA)
- Coating By Spraying Or Casting (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、特にガスタービン
構造部材及びその他の構造部材に適する耐熱性耐食性の
保護被覆層に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-resistant and corrosion-resistant protective coating layer particularly suitable for gas turbine structural members and other structural members.
【０００２】[0002]
【従来の技術】主としてニッケル、クロム、コバルト、
アルミニウム及び希土類の反応性元素を含む合金からな
る保護被覆層は多様の組成で開発されまたテストされて
きた。この種の被覆層の１つは例えば米国特許第４００
５９８９号明細書から公知である。米国特許第４０３４
１４２号明細書からは、珪素の付加的な成分がこの種の
保護被覆の性質を更に改良し得ることが公知である。こ
の文献に記載されている個々の元素の比較的広い範囲は
確かに定性的に耐熱、耐腐食性の保護層を提供する手段
を示しているが、そこに示された組成は定量的には全て
の設定課題に対して十分に詳述されていない。2. Description of the Related Art Nickel, chromium, cobalt,
Protective coatings made of alloys containing aluminum and rare earth reactive elements have been developed and tested in a variety of compositions. One such coating is disclosed, for example, in US Pat.
It is known from US Pat. US Patent No. 4034
No. 142 discloses that additional components of silicon can further improve the properties of such protective coatings. Although the relatively wide range of individual elements described in this document does indeed qualitatively provide a means to provide a heat and corrosion resistant protective layer, the composition shown there is quantitatively Not fully detailed for all configuration tasks.
【０００３】ドイツ連邦共和国特許第２３５５６７４号
明細書から保護層の他の組成が公知であるが、これは定
常ガスタービンにおけるような高い給気温度を生じる可
能性のある使用分野には適していない。[0003] Other compositions of protective layers are known from DE-A-2 355 684, but are not suitable for applications in which a high supply temperature can occur, such as in stationary gas turbines. .
【０００４】[0004]
【発明が解決しようとする課題】本発明の課題は中音で
もまた高温でも高い耐食性を有する保護被覆層を提供す
ることにある。この腐食特性は６００〜約１１５０℃の
温度範囲で特にこの種の保護被覆層を部分負荷又は全負
荷運転で作動する定常ガスタービン装置で使用し得るよ
うに改善するものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a protective coating having high corrosion resistance at medium and high temperatures. This corrosion property is improved in the temperature range from 600 to about 1150 ° C., in particular, such protective coatings can be used in stationary gas turbine systems operating at part-load or full-load operation.
【０００５】[0005]
【課題を解決するための手段】上述の課題を解決するた
め、本発明においては、クロム ２８〜３２重量％、ア
ルミニウム ７〜９重量％、珪素 １〜２重量％、希土
類の反応性元素の少なくとも１種 ０．３〜１重量％、
レニウム １５重量％以下、残り ニッケル２５〜４０
重量％、コバルト少なくとも５重量％及び不純物を含
む。In order to solve the above-mentioned problems, in the present invention, 28 to 32% by weight of chromium, 7 to 9% by weight of aluminum, 1 to 2% by weight of silicon, and at least one of reactive elements of rare earth elements are used. 0.3-1% by weight
Rhenium 15% by weight or less, remaining nickel 25-40
% By weight, at least 5% by weight of cobalt and impurities.
【０００６】その際更に保護被覆層の個々の構成成分に
以下の特性又は意義を付帯させることもできる。In this case, the individual constituents of the protective coating layer may be given the following properties or significance.
【０００７】コバルトは高温で良好な腐食性を示す構成
成分として作用する。[0007] Cobalt acts as a component that exhibits good corrosivity at high temperatures.
【０００８】ニッケルは被覆の延性を改善し、ニッケル
‐ベース基本材料に対する相互拡散う減少させる。ニッ
ケルの有利な範囲は２５〜３５重量％、好ましくは約３
０重量％である。Nickel improves the ductility of the coating and reduces interdiffusion to the nickel-based base material. An advantageous range for nickel is 25-35% by weight, preferably about 3%.
0% by weight.
【０００９】クロムは約９００℃までの中温での腐食性
を改善し、酸化アルミニウム被覆層の形成を助成する。
クロムの有利な範囲は２９〜３１重量％、特に３０重量
％である。Chromium improves corrosivity at medium temperatures up to about 900 ° C. and aids in the formation of aluminum oxide coatings.
An advantageous range for chromium is 29-31% by weight, especially 30% by weight.
【００１０】アルミニウムは約１１５０℃までの高温で
の腐食性を改善する。アルミニウムの有利な量は７．５
〜８．５重量％、特に約８重量％である。Aluminum improves corrosion at elevated temperatures up to about 1150 ° C. The preferred amount of aluminum is 7.5
８8.5% by weight, especially about 8% by weight.
【００１１】珪素はクロム及びアルミニウムの作用を助
け、保護酸化層の付着を促進する。珪素量の有利な範囲
は１〜２重量％、好ましくは約１．５重量％である。珪
素の添加によりアルミニウムの量及び／又はクロムの量
は良好な腐食特性にとって本来望まれる高い濃度から延
性にとって一層好ましい値に減ずることができ、その際
腐食特性が低下することはない。[0011] Silicon assists the action of chromium and aluminum and promotes the deposition of a protective oxide layer. An advantageous range for the amount of silicon is 1-2% by weight, preferably about 1.5% by weight. With the addition of silicon, the amount of aluminum and / or the amount of chromium can be reduced from the high concentration originally desired for good corrosion properties to a more favorable value for ductility, without degrading the corrosion properties.
【００１２】希土類の反応性元素特にイットリウムの作
用は公知である。この場合有利な範囲は０．３〜１重量
％、特に約０．６重量％である。The action of rare earth reactive elements, especially yttrium, is known. An advantageous range in this case is 0.3-1% by weight, in particular about 0.6% by weight.
【００１３】上記の優先範囲で実験した場合、１２００
℃を上回る給気温度を有するガスタービンに使用するの
に特に良好な腐食特性を示す。When the experiment was performed in the above priority range, 1200
It exhibits particularly good corrosion properties for use in gas turbines having an air supply temperature above 0 ° C.
【００１４】１５％以下の範囲特に数％の量で配合した
場合、保護被覆層の特性は低下せず、むしろ多くの点で
改善する種々の元素が文献から公知である。本発明はこ
の種の配合物を有する合金を含む。Various elements are known from the literature which do not impair the properties of the protective coating, but rather improve in many respects, when incorporated in the range of less than 15%, in particular in amounts of several percent. The invention includes alloys having this type of formulation.
【００１５】更に保護被覆層ではほとんど関心をもたれ
ていない元素、すなわちレニウムは、これを１〜１５重
量％、有利には４〜１０重量％、特に約７重量％の量で
配合した場合、腐食特性を明らかに改善し得ることを示
した。レニウムは多くの貴金属ほど高価ではないにもか
かわらず、保護被覆層の構成成分として例えば白金と同
様に良好な特性をもたらすことができ、また少量でも有
効である。Furthermore, the element of little interest in the protective coating, namely rhenium, is corroded when it is incorporated in an amount of 1 to 15% by weight, preferably 4 to 10% by weight, in particular about 7% by weight. It showed that the properties could be improved obviously. Although rhenium is not as expensive as many noble metals, it can provide good properties as a component of a protective coating, such as platinum, and is effective even in small amounts.
【００１６】本発明においては、第１に酸化に対する良
好な安定性、第２に腐食に対する良好な安定性、即ち特
に硫化物による腐食に対する良好な安定性、第３に合金
から作られる被覆層の良好な延性を満足する保護被覆層
を得ようとするものである。In the present invention, firstly, good stability against oxidation, secondly good stability against corrosion, that is, good stability especially against corrosion by sulfides, and thirdly, the coating layer made of an alloy. An object is to obtain a protective coating layer satisfying good ductility.
【００１７】本発明の合金の基体を形成するニッケルと
コバルトについては、ニッケルの量が多いと酸化に対す
る安定性と延性にとっては有利であるが、腐食に対する
安定性に関しては不利であり、一方コバルトの量が多い
と酸化に対する安定性と延性に対しては不利であるが腐
食に対する安定性に対しては逆に有利である。本発明の
ニッケルとコバルトの成分量については両者の有利な特
性が発現するように定められるものである。Regarding nickel and cobalt forming the base of the alloy of the present invention, a large amount of nickel is advantageous for stability to oxidation and ductility, but disadvantageous for stability against corrosion, while it is disadvantageous for stability against corrosion. Larger amounts are disadvantageous for stability to oxidation and ductility but are conversely advantageous for stability against corrosion. The component amounts of nickel and cobalt of the present invention are determined so as to exhibit advantageous characteristics of both.
【００１８】クロムについては、延性に対しては不利に
働くが腐食に対する安定性については極めて有利に作用
する。アルミニウムは同様に延性に対しては不利に働く
が、酸化に対する安定性については有利に作用する。そ
れ故クロム及びアルミニウムの成分量に関してもこれら
の両者の特性を考慮し決定される。腐食に対する安定性
を確保するためクロムの量は比較的高く選定され、それ
により生ずる延性に対する不利はアルミニウムの量を比
較的小さく選ぶことによって補い、アルミニウムの量の
小さいことによる酸化に対する安定性の相対的な下降は
珪素によって補償される。Chromium has a disadvantageous effect on ductility, but has a very advantageous effect on stability against corrosion. Aluminum also has a disadvantageous effect on ductility, but has a favorable effect on stability against oxidation. Therefore, the contents of chromium and aluminum are also determined in consideration of the characteristics of both of them. The amount of chromium is chosen to be relatively high in order to ensure stability against corrosion, and the disadvantage to ductility caused by this is compensated by choosing a relatively small amount of aluminum, and the relative stability of oxidation to oxidation due to the small amount of aluminum. The significant drop is compensated by silicon.
【００１９】本発明による被覆はそれ自体は公知の方法
でプラズマ噴射法又は蒸着法（ＰＶＤ）により施すこと
ができ、ニッケル又はコバルトをベースとする超合金か
らなるガスタービン翼に特に適している。特に例えば１
２００℃を越える高い給気温度を有するガスタービンの
構造部材にも、この種の保護被覆層を装着することがで
きる。本発明による被覆層の特殊な組成は、高い給気温
度を有する定常ガスタービンに対して特に好ましいもの
であることが実験の結果判明した。The coating according to the invention can be applied in a manner known per se by plasma spraying or vapor deposition (PVD) and is particularly suitable for gas turbine blades made of nickel or cobalt based superalloys. Especially for example 1
Structural components of gas turbines having a high supply temperature of over 200 ° C. can also be provided with such a protective coating. Experiments have shown that the particular composition of the coating according to the invention is particularly preferred for stationary gas turbines having a high supply temperature.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ０２Ｃ 7/00 Ｆ０２Ｃ 7/00 Ａ Ｆ２３Ｒ 3/42 Ｆ２３Ｒ 3/42 Ｃ 合議体 審判長 三浦 悟 審判官 綿谷 晶廣 審判官 平塚 義三 (56)参考文献 特開 昭57−177952（ＪＰ，Ａ) 特開 昭51−33717（ＪＰ，Ａ) 特開 昭62−30037（ＪＰ，Ａ)──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI F02C 7/00 F02C 7/00 A F23R 3/42 F23R 3/42 C Joint Referee Chief Satoru Miura Referee Akihiro Watani Referee Hiratsuka Yoshizo (56) References JP-A-57-177952 (JP, A) JP-A-51-33717 (JP, A) JP-A-62-2370037 (JP, A)
Claims (8)
％、 レニウム １５重量％以下、 残り ニッケル２５〜４０重量％、コバルト少なくとも
５重量％及び不純物を含むことを特徴とする耐熱性耐食
性の保護被覆層。1. 28 to 32% by weight of chromium, 7 to 9% by weight of aluminum, 1 to 2% by weight of silicon, 0.3 to 1% by weight of at least one rare earth reactive element, 15% by weight or less of rhenium, the balance A heat-resistant and corrosion-resistant protective coating layer comprising 25 to 40% by weight of nickel, at least 5% by weight of cobalt and impurities.
ることを特徴とする請求項１記載の保護被覆層。2. The protective coating layer according to claim 1, wherein the rare earth reactive element is yttrium.
徴とする請求項１〜４のいずれか１つに記載の保護被覆
層。5. The protective coating layer according to claim 1, comprising 1 to 15% by weight of rhenium.
徴とする請求項５記載の保護被覆層。6. The protective coating layer according to claim 5, comprising 4 to 10% by weight of rhenium.
る請求項６記載の保護被覆層。7. The protective coating layer according to claim 6, comprising 7% by weight of rhenium.
ことを特徴とする請求項１〜７のいずれか１つに記載の
保護被覆層。8. The protective coating layer according to claim 1, which is coated by plasma spraying or vapor deposition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26245396A JP3330828B2 (en) | 1996-09-11 | 1996-09-11 | Heat-resistant and corrosion-resistant protective coating layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26245396A JP3330828B2 (en) | 1996-09-11 | 1996-09-11 | Heat-resistant and corrosion-resistant protective coating layer |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1508939A Division JP2773050B2 (en) | 1989-08-10 | 1989-08-10 | Heat-resistant and corrosion-resistant protective coating layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09118960A JPH09118960A (en) | 1997-05-06 |
| JP3330828B2 true JP3330828B2 (en) | 2002-09-30 |
Family
ID=17376003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26245396A Expired - Lifetime JP3330828B2 (en) | 1996-09-11 | 1996-09-11 | Heat-resistant and corrosion-resistant protective coating layer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3330828B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4553176A1 (en) * | 2023-11-07 | 2025-05-14 | The Swatch Group Research and Development Ltd | Paramagnetic hard stainless steel and manufacturing method therefor |
-
1996
- 1996-09-11 JP JP26245396A patent/JP3330828B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4553176A1 (en) * | 2023-11-07 | 2025-05-14 | The Swatch Group Research and Development Ltd | Paramagnetic hard stainless steel and manufacturing method therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09118960A (en) | 1997-05-06 |
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