JPH0132309B2 - - Google Patents
Info
- Publication number
- JPH0132309B2 JPH0132309B2 JP55128738A JP12873880A JPH0132309B2 JP H0132309 B2 JPH0132309 B2 JP H0132309B2 JP 55128738 A JP55128738 A JP 55128738A JP 12873880 A JP12873880 A JP 12873880A JP H0132309 B2 JPH0132309 B2 JP H0132309B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- sprayed
- resistant
- base material
- temperature
- 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
Links
Classifications
-
- 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
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
-
- 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
- C23C10/28—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes
- C23C10/30—Solid state diffusion of only metal elements or silicon into metallic material surfaces using solids, e.g. powders, pastes using a layer of powder or paste on the surface
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
本発明はタービン、ブロア、ボイラなどに用い
られる耐熱合金に耐高温酸化性と耐高温腐食性と
を付与する表面処理方法に関する。
石油や天然ガス等を燃料とする産業用ガスター
ビンはその効率向上のためにタービン入口のガス
温度がより高くなる傾向にある。また、最近の燃
料供給状況の悪化にともない使用される燃料はよ
り多様化し、硫黄（Ｓ）、ナトリウム（Na）、バ
ナジウム（Ｖ）等の腐食性不純物含有量も多くな
る傾向にある。この結果、これらの高温ガスにさ
らされるタービンのブレードや燃焼器等のいわゆ
るホツトパーツは極めて厳しい高温酸化及び高温
腐食を受けることになる。
従来これらのホツトパーツは耐熱合金を中心に
構成されており、特にタービンのブレードは超合
金と称されるNi基やCo基の合金が用いられるが、
これら超合金は一般に高温強度が優先されるた
め、耐腐食性や耐酸化性に劣るという欠点があ
る。このため、従来よりこれらの耐熱合金に耐酸
化性や耐腐食性を付与する試みがなされており、
その一例として化学的手法や物理的手法を用いた
各種の表面処埋方法が用いられているが、その効
果と処理コストを考慮した場合いずれも決定的な
方法はない状況にある。
本発明は以上のような課題を解決するために提
案するものである。すなわち、本発明は耐熱合金
に耐高温酸化性と耐高温腐食性とを付与するため
に、基材表面に第一層として耐熱材料である
NiCr合金を溶射した後、第二層として耐食材料
であるAlSi粉末またはAl粉末を含むコーテイン
グ液をスプレー塗り、ハケ塗り、その他の方法に
より塗布した上さらに熱処理を行うことを特徴と
するものである。そして、本発明の処理方法には
従来の処理方法と比較した場合第１表に示したよ
うな特徴がある。
The present invention relates to a surface treatment method for imparting high-temperature oxidation resistance and high-temperature corrosion resistance to heat-resistant alloys used in turbines, blowers, boilers, etc. Industrial gas turbines that use petroleum, natural gas, or the like as fuel tend to have higher gas temperatures at the turbine inlet in order to improve their efficiency. Furthermore, with the recent worsening of fuel supply conditions, the fuels used are becoming more diverse, and the content of corrosive impurities such as sulfur (S), sodium (Na), and vanadium (V) tends to increase. As a result, so-called hot parts such as turbine blades and combustors exposed to these high-temperature gases are subject to extremely severe high-temperature oxidation and high-temperature corrosion. Conventionally, these hot parts have mainly been constructed of heat-resistant alloys, and turbine blades in particular have been made of Ni-based and Co-based alloys called superalloys.
These superalloys generally prioritize high-temperature strength, so they have the disadvantage of poor corrosion resistance and oxidation resistance. For this reason, attempts have been made to impart oxidation and corrosion resistance to these heat-resistant alloys.
As an example, various surface treatment methods using chemical methods and physical methods are used, but when considering the effects and processing costs, there is no definitive method for any of them. The present invention is proposed to solve the above problems. That is, the present invention uses a heat-resistant material as a first layer on the surface of a base material in order to impart high-temperature oxidation resistance and high-temperature corrosion resistance to a heat-resistant alloy.
After the NiCr alloy is thermally sprayed, a coating liquid containing AlSi powder or Al powder, which is a corrosion-resistant material, is applied as a second layer by spraying, brushing, or other methods, and then heat treatment is performed. . The processing method of the present invention has the characteristics shown in Table 1 when compared with conventional processing methods.
【表】
次に本発明を実施例によつて具体的に示す。
超合金としてガスタービンのホツトパーツに汎
用されているUdimet520（19％Cr 12％Co ６％
Mo ３％Ti ２％Al １％Fe Ni−Bal）に、以下
の順序で処理を行つた。
基材表面をアルカリ性エマルジヨン洗剤で洗
浄した後、フロン系溶剤による蒸気洗浄を行な
い、Al2O3のブラストにより清浄にする。
基材表面にプラズマ溶射によつてNi−Cr
（50／50）合金を約50μコーテイングする。
溶射層表面をAl2O3にてブラストし最表層の
酸化皮膜を除去する。
溶射層表面に、粒径0.1〜1μ程度のAlおよび
Siを有機溶剤（アルコール、ソルベントナフサ
など）中に分散させたスラリーコーテイング液
をスプレー法にて塗布する。
以上の処理をした基材を電気炉中に入れ、80
℃を（±５℃）に20分間保つて溶剤を蒸発揮散
させた後、330℃（±５℃）に15分間保ち、取
り出す。
さらにこの基材を水素炉中で1080℃で４時間
保持した後、炉冷して取出す。
なお、上記の工程において水素炉の替りに真
空炉を用いても可能である。さらに本実施例では
Udimet520への処理例を示したが、これ以外の
Ni基合金やCo基合金及びステンレス鋼への処理
においても極めてすぐれた表面処理層が得られ
た。
以上のように溶射層にさらにスラリーコーテイ
ング液を塗布して拡散浸透処理を施した表面処理
層はその表面が極めて平滑であり、また塗布層の
Al、Siが溶射層中へ十分浸入して溶射層中の細
孔は全くなくなつており、処理層全体が均質化し
ていた。すなわちAlの融点は660℃であり、この
ため熱処理により溶融して細孔中へ侵入するとと
もに、表面を平滑化するものと考えられる。さら
に溶射層中を拡散浸透したAl、Siの一部は基材
に達し基材中へも拡散しているのが認められた。
第２表に、本発明法及び従来法で作製した処理
層に対して実施した耐フライアツシユエロージヨ
ンテスト、耐食性テスト、ガスタービンブレード
による実用テスト、の結果を示した。本発明法の
ものは耐フライアツシユエロージヨンテスト及び
耐食性テストにおいて従来法のものに比較してす
ぐれた性能を発揮した。また、ガスタービンブレ
ードによる実用テストにおいても本発明のものは
燃料灰の付着量が少なくなる傾向を示した。さら
に本発明のものは1100℃に15分間保持して20℃の
水中に投入する処理を５回繰返す熱衝撃試験にお
いても、剥離やクラツクを生じることなく極めて
すぐれた密着性を示した。[Table] Next, the present invention will be specifically illustrated by examples. Udimet520 (19% Cr 12% Co 6%) is a superalloy commonly used in gas turbine hot parts.
(Mo 3% Ti 2% Al 1% Fe Ni-Bal) was processed in the following order. After cleaning the surface of the substrate with an alkaline emulsion detergent, steam cleaning with a fluorocarbon solvent and cleaning with Al 2 O 3 blasting. Ni-Cr is applied to the surface of the base material by plasma spraying.
Coat approximately 50μ of (50/50) alloy. The surface of the sprayed layer is blasted with Al 2 O 3 to remove the outermost oxide film. On the surface of the sprayed layer, Al and
A slurry coating solution in which Si is dispersed in an organic solvent (alcohol, solvent naphtha, etc.) is applied by spraying. Place the base material treated above in an electric furnace and
After keeping the temperature at (±5℃) for 20 minutes to allow the solvent to evaporate, keep it at 330℃ (±5℃) for 15 minutes and take it out. Further, this base material was held at 1080° C. for 4 hours in a hydrogen furnace, and then cooled in the furnace and taken out. Note that a vacuum furnace may be used instead of the hydrogen furnace in the above steps. Furthermore, in this example
An example of processing for Udimet520 is shown, but other than this
Extremely excellent surface treatment layers were also obtained when treating Ni-based alloys, Co-based alloys, and stainless steel. As mentioned above, the surface of the surface treated layer, which is obtained by applying a slurry coating liquid to the thermal spray layer and performing diffusion penetration treatment, has an extremely smooth surface.
Al and Si had sufficiently penetrated into the sprayed layer, and there were no pores in the sprayed layer, and the entire treated layer was homogenized. That is, the melting point of Al is 660°C, and therefore, it is thought that heat treatment melts it and penetrates into the pores, as well as smoothing the surface. Furthermore, it was observed that some of the Al and Si that had diffused into the sprayed layer reached the base material and also diffused into the base material. Table 2 shows the results of a fly ashes erosion resistance test, a corrosion resistance test, and a practical test using a gas turbine blade, which were conducted on treated layers prepared by the method of the present invention and the conventional method. The method of the present invention exhibited superior performance in the fly ashes erosion test and corrosion resistance test compared to the conventional method. Furthermore, in practical tests using gas turbine blades, the blades of the present invention tended to have less fuel ash adhesion. Furthermore, the material of the present invention exhibited extremely excellent adhesion without peeling or cracking even in a thermal shock test in which the material was held at 1100° C. for 15 minutes and placed in water at 20° C. five times.
Claims (1)
耐熱材料を溶射し、その上にAlSi粉末またはAl
粉末を有機溶剤中に懸濁させたスラリ液を塗布
し、次に該溶射・塗布部に拡散浸透の熱処理を施
すことにより、溶射層の多孔部を充填すると共に
合金化及び母材への拡散浸透作用を促すことによ
つて耐高温酸化性と耐高温腐食性とを付与するよ
うにしたことを特徴とする耐熱合金の表面処理方
法。1 A heat-resistant material made of NiCr alloy is thermally sprayed on the surface of a heat-resistant alloy member, and then AlSi powder or Al
A slurry liquid made by suspending the powder in an organic solvent is applied, and then the sprayed/applied area is subjected to a heat treatment of diffusion penetration, which fills the pores of the sprayed layer, alloys it, and diffuses it into the base material. A method for surface treatment of a heat-resistant alloy, characterized in that it imparts high-temperature oxidation resistance and high-temperature corrosion resistance by promoting penetration action.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12873880A JPS5754282A (en) | 1980-09-17 | 1980-09-17 | Surface treatment of heat resistant alloy |
| EP19810303264 EP0048083B1 (en) | 1980-09-17 | 1981-07-16 | Surface treatment method of heat-resistant alloy |
| DE8181303264T DE3173970D1 (en) | 1980-09-17 | 1981-07-16 | Surface treatment method of heat-resistant alloy |
| CA000383402A CA1173305A (en) | 1980-09-17 | 1981-08-07 | Surface treatment method of heat-resistant alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12873880A JPS5754282A (en) | 1980-09-17 | 1980-09-17 | Surface treatment of heat resistant alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5754282A JPS5754282A (en) | 1982-03-31 |
| JPH0132309B2 true JPH0132309B2 (en) | 1989-06-30 |
Family
ID=14992227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12873880A Granted JPS5754282A (en) | 1980-09-17 | 1980-09-17 | Surface treatment of heat resistant alloy |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0048083B1 (en) |
| JP (1) | JPS5754282A (en) |
| CA (1) | CA1173305A (en) |
| DE (1) | DE3173970D1 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58177458A (en) * | 1982-04-12 | 1983-10-18 | Sumitomo Metal Ind Ltd | Cementation method of nickel-chromium alloy |
| JPS63487A (en) * | 1986-06-19 | 1988-01-05 | Tookaro Kk | Heat resistance member having oxide film on coating of chromium-contained thermal spraying metal |
| US5789077A (en) | 1994-06-27 | 1998-08-04 | Ebara Corporation | Method of forming carbide-base composite coatings, the composite coatings formed by that method, and members having thermally sprayed chromium carbide coatings |
| DE19824792B4 (en) * | 1998-06-03 | 2005-06-30 | Mtu Aero Engines Gmbh | Method for producing an adhesive layer for a thermal barrier coating |
| US6294261B1 (en) * | 1999-10-01 | 2001-09-25 | General Electric Company | Method for smoothing the surface of a protective coating |
| US20060057418A1 (en) | 2004-09-16 | 2006-03-16 | Aeromet Technologies, Inc. | Alluminide coatings containing silicon and yttrium for superalloys and method of forming such coatings |
| US9133718B2 (en) | 2004-12-13 | 2015-09-15 | Mt Coatings, Llc | Turbine engine components with non-aluminide silicon-containing and chromium-containing protective coatings and methods of forming such non-aluminide protective coatings |
| PL3095895T3 (en) * | 2004-12-13 | 2019-10-31 | Mt Coatings Llc | Method of forming silicon-containing protective coatings on metal components |
| CN109868447B (en) * | 2017-12-01 | 2022-03-25 | 通用电气公司 | Method for reducing surface roughness |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3837894A (en) * | 1972-05-22 | 1974-09-24 | Union Carbide Corp | Process for producing a corrosion resistant duplex coating |
| CA1004964A (en) * | 1972-05-30 | 1977-02-08 | Union Carbide Corporation | Corrosion resistant coatings and process for making the same |
| JPS5635749B2 (en) * | 1973-01-23 | 1981-08-19 | ||
| US3989863A (en) * | 1975-07-09 | 1976-11-02 | The International Nickel Company, Inc. | Slurry coating process |
| GB2009251B (en) * | 1977-12-01 | 1982-08-18 | Rolls Royce | Coated metal part and the method of applying coating |
-
1980
- 1980-09-17 JP JP12873880A patent/JPS5754282A/en active Granted
-
1981
- 1981-07-16 DE DE8181303264T patent/DE3173970D1/en not_active Expired
- 1981-07-16 EP EP19810303264 patent/EP0048083B1/en not_active Expired
- 1981-08-07 CA CA000383402A patent/CA1173305A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CA1173305A (en) | 1984-08-28 |
| EP0048083A1 (en) | 1982-03-24 |
| EP0048083B1 (en) | 1986-03-05 |
| DE3173970D1 (en) | 1986-04-10 |
| JPS5754282A (en) | 1982-03-31 |
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