JPH0266150A - Heat shielding coating method - Google Patents
Heat shielding coating methodInfo
- Publication number
- JPH0266150A JPH0266150A JP21506788A JP21506788A JPH0266150A JP H0266150 A JPH0266150 A JP H0266150A JP 21506788 A JP21506788 A JP 21506788A JP 21506788 A JP21506788 A JP 21506788A JP H0266150 A JPH0266150 A JP H0266150A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- heat
- heat shielding
- binding layer
- bonding layer
- 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.)
- Pending
Links
- 238000000576 coating method Methods 0.000 title abstract 3
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 18
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000005422 blasting Methods 0.000 claims abstract description 13
- 238000009792 diffusion process Methods 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000005507 spraying Methods 0.000 claims abstract description 4
- 239000007921 spray Substances 0.000 claims description 2
- 238000004942 thermal barrier coating method Methods 0.000 claims description 2
- 238000007751 thermal spraying Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 9
- 238000011282 treatment Methods 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052593 corundum Inorganic materials 0.000 abstract description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 229910018138 Al-Y Inorganic materials 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 54
- 239000012720 thermal barrier coating Substances 0.000 description 8
- 230000035939 shock Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000001000 micrograph Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
Landscapes
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、耐熱合金に遮熱コーティング金賦与する方法
に関し、特にガスタービン高温部材の遮熱コーティング
形成に有利に適用しうる方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for applying a thermal barrier coating to a heat-resistant alloy, and particularly to a method that can be advantageously applied to forming a thermal barrier coating on high-temperature components of a gas turbine.
近年、遮熱コーティングはガスタービン高温部材の中で
も使用環境の激しい部材、例えばタービン動静翼に適用
されつ工ある。In recent years, thermal barrier coatings have been applied to gas turbine high-temperature components that are used in harsh environments, such as turbine rotor and stationary blades.
従来のガスタービン高温部材に遮熱コーティングを施こ
す方法は、先ず遮熱コーティングを施工する高温部材の
表面をアルミナ（Ａｚ２０３）粒等によジグリッドブラ
スト処理を施して高温部材の表面を溶射に適し次状態と
じ九後、高温部材の耐高温腐食及び高温部材と最後に形
成される遮熱層（例えばＺｒＯ□系セラミックス）との
熱膨張率の差に起因する熱応力緩和のため、Ｍ−Ｏｒ−
Ａ／−Ｙ （Ｍ −Ｎｉ、Ｃｏ等）系の合金粉末を被覆
して結合層を形成し、次いで該結合層の拡散熱処理を行
うか、ｔｔは行うことなく、最後に高温部材のメタル温
度を下げる目的のいわゆる遮熱層となるべき材料の溶射
′ｆｌ：施こしてい友。遮熱層用材料としては熱伝導率
が低く、耐熱衝撃性が良好なＭｇＯ，Ｙ２Ｏ，等で安定
化し；？ＺｒＯ□ が一般的に用いられている。又結
合層及び遮熱層共に、その施工方法は溶射法、ＣＶＤ法
、ＰＶＤ法等を用いることができるが溶射法が一般的で
ある。The conventional method of applying a thermal barrier coating to high-temperature parts of a gas turbine is to first perform a di-grid blasting treatment on the surface of the high-temperature member to which the thermal barrier coating is to be applied using alumina (Az203) particles, etc., and then thermally spray the surface of the high-temperature member. After binding in a suitable state, M- Or-
A/-Y (M-Ni, Co, etc.) alloy powder is coated to form a bonding layer, and then the bonding layer is subjected to diffusion heat treatment, or tt is not performed, and the metal temperature of the high-temperature member is finally adjusted. Thermal spraying of a material that will become a so-called heat shielding layer for the purpose of lowering the temperature. As a material for the heat shield layer, it is stabilized with MgO, Y2O, etc., which have low thermal conductivity and good thermal shock resistance. ZrO□ is commonly used. Further, the bonding layer and the heat shielding layer can be applied by a thermal spraying method, a CVD method, a PVD method, etc., but the thermal spraying method is generally used.
従来の遮熱コーティングの施工法において、耐熱合金表
面をグリッドブラスト処理し九後、結合層を形成させた
だけでは耐熱合金と結合層の付着強度が弱いという問題
点かあシ、その几め、結合層と耐熱合金（例えば高温部
材）の付着強度を向上し、耐熱衝撃性を向上させる友め
に拡散熱処理（概ね１０００ Ｓｌ ２００ＣＸ１〜１
０時間）を実施する場合がある。この拡散熱処理は遮熱
層施工後に実施すると遮熱層にき裂が生じる問題があシ
、結合層施工後に実施することが望しいとされている。In the conventional method of applying thermal barrier coatings, if a bonding layer is simply formed after grid blasting the heat-resistant alloy surface, the adhesion strength between the heat-resistant alloy and the bonding layer is weak. Diffusion heat treatment (approximately 1000 Sl 200C
0 hours) may be implemented. If this diffusion heat treatment is carried out after the construction of the heat shield layer, there is a problem that the heat shield layer will crack, so it is said that it is desirable to carry out this treatment after the construction of the bonding layer.
しかし、結合層施工後に拡散熱処理全実施すると結合層
の表層部に１０〜２０μｍ程度の変質層（酸化スケール
層、脱Ｃｒ層）が生じ、この変質層の上に遮熱層を施工
すると遮熱層の付着力低下及び耐熱衝撃性の低下金利き
起こすという問題点があった。However, if the diffusion heat treatment is carried out after the bonding layer is constructed, an altered layer (oxidized scale layer, Cr-free layer) of approximately 10 to 20 μm will be formed on the surface of the bonding layer, and if a heat shielding layer is constructed on top of this altered layer, the heat shielding layer will be removed. There were problems in that the adhesion of the layer decreased and the thermal shock resistance decreased.
本発明は上記技術水準に鑑み、従来技術におけるような
不具合を発生させない遮熱コーティングを耐熱合金に賦
与する方法を提供しようとするものである。In view of the above state of the art, the present invention seeks to provide a method for providing a heat-resistant alloy with a thermal barrier coating that does not cause the problems encountered in the prior art.
本発明は耐熱合金表面に結合層となるべき材料ｔ−溶射
した後、拡散熱処理し、結合層表面に生成し比変質層を
グリッドブラスト処理して除去した後、結合層表面に遮
熱層となるべき材料を溶射することを特徴とする耐熱合
金の遮熱コーティング方法である。In the present invention, after thermally spraying the material to become the bonding layer on the surface of the heat-resistant alloy, a diffusion heat treatment is performed, and the specific deterioration layer formed on the surface of the bonding layer is removed by grid blasting. This is a thermal barrier coating method for heat-resistant alloys, which is characterized by thermal spraying the desired material.
すなわち、本発明は耐熱合金表面に適用し九結合層金拡
紋熱処理してその付着強度を向上させ、かつ拡散熱処理
を実施することにより生じた結合層表層部の変質層を除
去する几めにＡｌ２Ｏ３粒等によるグリッドブラスト処
理管実施する点を新規とするものである。That is, the present invention is applied to the surface of a heat-resistant alloy, performs nine bond layer gold expansion heat treatments to improve its adhesion strength, and removes the altered layer on the surface layer of the bond layer caused by the diffusion heat treatment. This is new in that it uses a grid blasting tube using Al2O3 grains, etc.
結合層に生じ比変質層を除去する手段としては、機械加
工、化学的方法等が考えられるが、このような手段で変
質層を除去した後の結合層表面は滑らかになシ、その上
に施工する遮熱層の付着強度が低下するが、グリッドブ
ラスト処理を採用すれば結合層表層部の変質層を除去し
た後の結合層表面は遮熱層を形成する材料の溶射に適し
た状態にな夛、形成される遮熱層に対する付着強度が向
上する。Mechanical processing, chemical methods, etc. can be considered as means for removing the deteriorated layer formed in the bonding layer, but after removing the deteriorated layer by such means, the surface of the bonding layer will be smooth, and the surface of the bonding layer will be smooth. Although the adhesion strength of the heat shielding layer to be applied will decrease, if grid blasting is used, the surface of the bonding layer after removing the altered layer on the surface of the bonding layer will be in a state suitable for thermal spraying of the material that will form the heat shielding layer. Moreover, the adhesion strength to the formed heat shielding layer is improved.
Ｃｏ基耐熱合金（市販名ＲＣＹ７６８）の表面を第１表
に示す条件でグリッドブラスト処理を実施し、結合層と
してＣｏＮ１ＣｒＡ／Ｙ（Ｃｏ−３２％ｗＬ−２１％Ｃ
ｒ−８％Ａｊ−０，５％Ｙ）＝ｉ厚さ１００１００Ａ射
しその後、１２００ＣＸ２時間（真空）の拡散熱処理を
実施し九。拡散熱処理後筒１図に示すように、結合層２
の表層部には厚さ１０〜２０μ重の変質層１が生じてお
シ、それを除去する九めに第２表に示す条件でグリッド
ブラスト処理を実施し念。なお第１図中、３は耐熱合金
である。The surface of a Co-based heat-resistant alloy (commercial name RCY768) was subjected to grid blasting under the conditions shown in Table 1, and a bonding layer of CoN1CrA/Y (Co-32%wL-21%C
r - 8% Aj - 0.5% Y) = i Thickness 100100A After that, diffusion heat treatment was carried out for 2 hours (vacuum) at 1200C. After diffusion heat treatment, as shown in Figure 1 of cylinder 1, bonding layer 2
A denatured layer 1 with a thickness of 10 to 20 µm was formed on the surface layer of the plate, and in order to remove it, grid blasting was carried out under the conditions shown in Table 2. In addition, in FIG. 1, 3 is a heat-resistant alloy.
このグリッドブラスト後は、第２図に示すように、結合
層２表層部に生じた変質層１は完全に除去されている。After this grid blasting, as shown in FIG. 2, the altered layer 1 formed on the surface of the bonding layer 2 has been completely removed.
又、当グリットブ２スト処理後の結合層２表面は遮熱層
を溶射するために適当な状態であシ、遮熱層としてＺｒ
Ｏ２・８Ｙ２０゜を厚さ３００μｍ溶射した。In addition, the surface of the bonding layer 2 after the grit blast treatment is in a suitable state for thermally spraying a heat shielding layer, and Zr is used as the heat shielding layer.
O2.8Y20° was sprayed to a thickness of 300 μm.
第３表に熱衝撃試験結果を示す。表中には、拡散熱処理
後、結合層表１部に生じた変質層を除去せずに遮熱層ｔ
−溶射したものの結果もあわせて示した。Table 3 shows the thermal shock test results. In the table, after the diffusion heat treatment, the heat shield layer t
-The results of thermal spraying are also shown.
第１表 母材（基質）のグリッドブラスト条件第２表
結合層のグリッドブラスト条件第３表
（＊）熱衝撃”、９５０Ｃ＃２００Ｃのく）返し数〔発
明の効果〕
以上のとおシ、本発明方法によって得られる遮熱コーテ
ィングは、耐熱衝撃特性に優れており、使用条件の厳し
い、例えばガスタービン動・静翼等に極めて有利に適用
できる。Table 1 Grid blasting conditions for base material (substrate) Table 2
Grid blasting conditions for the bonding layer Table 3 (*) "Thermal shock", number of repetitions of 950C #200C [Effects of the invention] Through the above, the thermal barrier coating obtained by the method of the present invention has excellent thermal shock resistance. Therefore, it can be extremely advantageously applied to gas turbine moving/stationary blades, etc., which have severe usage conditions.
第１図は結合層溶射後拡散熱処理を実施した際の結合層
近傍の断面金属組織の顕微鏡写真、第２図は、本発明の
一実施例としてグリッドブラスト処理によシ結合層表層
部の変質層を除去した際の結合層近傍の断面金属組織の
顕＠鏡写真である。
１・・・・−・変質層、２・・・・・・結合層、５・・
・・・・母材（耐熱合金）Fig. 1 is a micrograph of the cross-sectional metal structure near the bonding layer when diffusion heat treatment was performed after thermal spraying the bonding layer, and Fig. 2 is a photomicrograph of the surface layer of the bonding layer due to grid blasting as an example of the present invention. This is a microscopic photograph of the cross-sectional metal structure near the bonding layer when the layer is removed. 1... Altered layer, 2... Bonded layer, 5...
...Base material (heat-resistant alloy)
Claims (1)
散熱処理し、結合層表面に生成した変質層をグリッドブ
ラスト処理して除去した後、結合層表面に遮熱層となる
べき材料を溶射することを特徴とする耐熱合金の遮熱コ
ーティング方法。After thermally spraying the material that will become the bonding layer on the surface of the heat-resistant alloy, we will perform diffusion heat treatment, remove the altered layer that has formed on the surface of the bonding layer using grid blasting, and then thermally spray the material that will become the heat shielding layer on the surface of the bonding layer. A thermal barrier coating method for heat-resistant alloys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21506788A JPH0266150A (en) | 1988-08-31 | 1988-08-31 | Heat shielding coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21506788A JPH0266150A (en) | 1988-08-31 | 1988-08-31 | Heat shielding coating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0266150A true JPH0266150A (en) | 1990-03-06 |
Family
ID=16666206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21506788A Pending JPH0266150A (en) | 1988-08-31 | 1988-08-31 | Heat shielding coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0266150A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6729206B2 (en) * | 2000-08-11 | 2004-05-04 | Aisin Aw Co., Ltd. | Automatic transmission case |
| KR100509118B1 (en) * | 2002-10-28 | 2005-08-19 | 한국전력공사 | Pre-oxidation treatment method for life extension of thermal barrier coating |
| JP2006083469A (en) * | 2004-09-15 | 2006-03-30 | Man Turbo Ag | Process for applying protective layer |
-
1988
- 1988-08-31 JP JP21506788A patent/JPH0266150A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6729206B2 (en) * | 2000-08-11 | 2004-05-04 | Aisin Aw Co., Ltd. | Automatic transmission case |
| KR100509118B1 (en) * | 2002-10-28 | 2005-08-19 | 한국전력공사 | Pre-oxidation treatment method for life extension of thermal barrier coating |
| JP2006083469A (en) * | 2004-09-15 | 2006-03-30 | Man Turbo Ag | Process for applying protective layer |
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