JPS62165507A - Turbine blade - Google Patents
Turbine bladeInfo
- Publication number
- JPS62165507A JPS62165507A JP667486A JP667486A JPS62165507A JP S62165507 A JPS62165507 A JP S62165507A JP 667486 A JP667486 A JP 667486A JP 667486 A JP667486 A JP 667486A JP S62165507 A JPS62165507 A JP S62165507A
- Authority
- JP
- Japan
- Prior art keywords
- shield plate
- turbine blade
- titanium
- erosion shield
- coat
- 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
- 230000003628 erosive effect Effects 0.000 claims abstract description 29
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000010936 titanium Substances 0.000 claims abstract description 18
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 18
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 11
- 239000000956 alloy Substances 0.000 claims abstract description 11
- 229910001347 Stellite Inorganic materials 0.000 claims abstract description 9
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical compound C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 claims abstract description 9
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims description 10
- 238000000576 coating method Methods 0.000 claims description 10
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 8
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010953 base metal Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241001609213 Carassius carassius Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004577 thatch Substances 0.000 description 1
Landscapes
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
【発明の詳細な説明】
（発明の技術分野）
本発明はタービン翼に関し、特にチタン系合金からなる
タービン翼の改良に関する。DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a turbine blade, and more particularly to an improvement in a turbine blade made of a titanium-based alloy.
近年、発電効率の改蕾等にともない蒸気タービンの低圧
側では長大なタービン翼が必要となり、材料に要求され
る特性はより苛酷となっている。In recent years, improvements in power generation efficiency have required longer turbine blades on the low-pressure side of steam turbines, and the properties required of materials have become more severe.
従来、タービン翼材料としては、１２Ｃｒｍが用いられ
ていたが、１２Ｃｒ！１１では上記の制約条件下では強
度不足が生じ、かつロータへの負荷が過大となり、今後
の大型化へは適用が困難であった。Conventionally, 12Cr was used as a material for turbine blades, but 12Cr! In No. 11, the strength was insufficient under the above-mentioned constraint conditions, and the load on the rotor was excessive, making it difficult to apply it to future larger scale applications.
この様な点から比強度（強度／比重）の大きいチタン系
合金の翼材料への適用が進んでいる。つまり、チタン合
金の強度は従来の１２Ｃｒ鋼と同程度であり、さらに、
比強度が高いため萱の回転による遠心力が低減され、ロ
ータへの過負荷の問題も除かれる。このように、チタン
合金は今後の翼の長大化にともない実用上有効なもので
ある。From this point of view, titanium-based alloys with high specific strength (strength/specific gravity) are increasingly being applied to blade materials. In other words, the strength of titanium alloy is comparable to that of conventional 12Cr steel, and furthermore,
The high specific strength reduces the centrifugal force caused by the rotation of the thatch, eliminating the problem of overloading the rotor. In this way, titanium alloys will be practically effective as blades become longer in the future.
一方、低圧部では、作動時の蒸気流中に含まれる凝縮水
滴の高速衝突によるエロージョン１０耗が著しいため、
従来の１２Ｃｒ鋼をタービンＷ材として用いた場合は耐
エロージヨン性の優れたステライト台金等をエロージョ
ンシールドとして翼先端前縁部にロウイ・」または溶接
等を施し保護している。On the other hand, in the low-pressure section, there is significant erosion due to high-speed collisions of condensed water droplets contained in the steam flow during operation.
When conventional 12Cr steel is used as the turbine W material, a stellite base metal with excellent erosion resistance is used as an erosion shield to protect the leading edge of the blade tip by welding or welding.
しかし、上記チタン系合金をタービン翼材として用い、
そのエロージョンシールド板としてステライトを用いた
場合、ロウ付では接合部の強度が不足し、溶接ではその
接合部は溶接脆化が生じ易く、いずれも使用上問題があ
る。However, when the above titanium alloy is used as a turbine blade material,
When Stellite is used as the erosion shield plate, the strength of the joint is insufficient when brazed, and the joint tends to become brittle when welded, both of which pose problems in use.
（発明の目的）
本発明はこのような点に鑑み、チタン系合金からなるタ
ービン翼の少なくとも翼先端前縁部に被膜が表面に形成
されたエロージョンシールド板を接合して、優れた鮒エ
ロージョン性を有するタービン翼を得ることを目的とす
る。(Objective of the Invention) In view of the above points, the present invention provides excellent crucian carp erosion resistance by bonding an erosion shield plate with a coating formed on the surface at least to the leading edge of the blade tip of a turbine blade made of a titanium alloy. The purpose is to obtain a turbine blade having the following characteristics.
（発明の慨要）
上記目的を達成するため本発明は、チタン系合金からな
るタービン翼において、チタン系被膜が表面に形成され
たエロージョンシールド板が、前記タービン翼の少なく
とも翼先端前縁部に固着されていることを特徴とする。(Summary of the Invention) To achieve the above object, the present invention provides a turbine blade made of a titanium-based alloy, wherein an erosion shield plate having a titanium-based coating formed on the surface is provided at least at the leading edge of the tip of the turbine blade. It is characterized by being fixed.
第１図は本発明に係るタービン製の一実施例を示り′斜
視図、′：５２図【よ要部の来所面図である。これらの
図面において、チタン系合金からなるタービン翼１の翼
先端前縁部には、侵述づ゛る如き被膜２ａが形成されて
いる工［１−ジョンシールド板２が接合されている。と
ころで、上記エロージョンシールド板２にステライトを
使用する場合には、切削加工により、エロージョンシー
ルド板として必要な形状とした後、表面にＣＶ Ｄ （
ＣｈｅｍｉｃａｌＶａｐｏｕｒ Ｄｅｐｏｓｉｔｏｉｎ
）またはＰ Ｖ Ｄ （ＰｈｙｓｉｃａｌＶａｐｏｕ
ｒ Ｄｅｐｏｓｉｔｉｏｎ ）にてＴｉＮまたはＴｉｃ
被膜２ａを厚さ２μｍ以上に形成する。これに９００〜
１１００℃の温度で１〜３０時間加熱する拡散処理を施
して、ステライト母材と被膜の密着強度を向上させる。Fig. 1 shows an embodiment of the turbine according to the present invention; Fig. 1 is a perspective view, and Fig. 52 is a plan view of the main parts. In these drawings, a construction shield plate 2 on which a coating 2a as described above is formed is bonded to the leading edge of the blade tip of a turbine blade 1 made of a titanium-based alloy. By the way, when using Stellite for the erosion shield plate 2, after cutting it into the shape required for the erosion shield plate, the surface is coated with CV D (
Chemical Vapor Depositoin
) or P V D (Physical Vapou
r Deposition) at TiN or Tic
The coating 2a is formed to have a thickness of 2 μm or more. 900~ for this
A diffusion treatment is performed by heating at a temperature of 1100° C. for 1 to 30 hours to improve the adhesion strength between the stellite base material and the coating.
このようにして作成したエロージョンシールド板２を、
機械加工または精密鍛造によって形成したチタン系合金
からなるタービン翼１の少なくとも翼先端前縁部に限ろ
うまたはヂタンろうにより接合する。また、エロージョ
ンシールド板２にチタン系台金を使用する場合には、エ
ロージョンシールド板として加工後表面にＣＶＤ、ＰＶ
Ｄ等でＴｉＮまたはＴｉＣ被Ｍ ２ ａを厚さ２μｍ以
上に形成する。これをチタン系合金製タービン翼１の少
なくとも翼先端前縁部にＴＩＧ、ＥＢまたはレーザー笠
により溶接し、６００〜７５０℃で応用除去を行う。次
にタービン”ＸＪ １ 全体を３００〜５００℃で３０
分〜６０分時効処即を施し母材チタン系合金の硬さを向
上させる。The erosion shield plate 2 created in this way is
At least the leading edge of the blade tip of the turbine blade 1 made of a titanium-based alloy formed by machining or precision forging is joined by soldering or ditan soldering. In addition, when using a titanium base metal for the erosion shield plate 2, CVD or PV is applied to the surface after processing as the erosion shield plate.
A TiN or TiC coating M 2 a is formed to have a thickness of 2 μm or more using D or the like. This is welded to at least the leading edge of the blade tip of the titanium-based alloy turbine blade 1 by TIG, EB or laser shade, and applied removal is performed at 600 to 750°C. Next, the entire turbine “XJ 1” was heated to 300 to 500℃ for 30
The hardness of the base material titanium alloy is improved by aging treatment for 60 minutes to 60 minutes.
第１表は、上述のようにして製造されたタービン翼のキ
ャビテーション・エロージョン試験の結果を比較例とあ
わせて示したものである。Table 1 shows the results of cavitation erosion tests on the turbine blades manufactured as described above, together with comparative examples.
なお、キャビテーション・エロージョン試験としては、
学振法（学術振興会９７委員会で設定）の磁歪振動型キ
ャビデージ：Ｉン・エロージョン試験装首を用い、試験
条件は撮動周波数６．５ＫＨ２、振動振幅１００μｍ１
試験液純水、液温２４±１℃、試験時間１８０分とした
。In addition, as a cavitation erosion test,
The magnetostrictive vibrating cavidage: I-in erosion test head according to the JSPS Act (set by the 97th Committee of the Japan Society for the Promotion of Science) was used, and the test conditions were an imaging frequency of 6.5 KH2 and a vibration amplitude of 100 μm1.
The test liquid was pure water, the liquid temperature was 24±1°C, and the test time was 180 minutes.
第１表
いては、従来のステライト以上の耐エロージヨン性を有
するエロージョンシールド板２が製作可能となる。As shown in Table 1, it is possible to manufacture an erosion shield plate 2 having erosion resistance superior to that of conventional Stellite.
以上説明したように、本発明においてはチタン系合金か
らなるタービン翼の少なくとも翼先端前縁部にチタン系
被膜が表面に形成されたエロージョンシールド板を接合
しているので、当該部の耐エロージヨン性を一段と向上
させることができて、耐エロージヨン性に優れたタービ
ン翼を得ることができ、可曲の長期化を図ることができ
る。As explained above, in the present invention, an erosion shield plate having a titanium-based coating formed on the surface is bonded to at least the leading edge of the blade tip of a turbine blade made of a titanium-based alloy, so that the erosion resistance of this part is improved. As a result, a turbine blade with excellent erosion resistance can be obtained, and its bendability can be extended for a long period of time.
【図面の簡単な説明】
第１図は本発明のタービン翼の一実施例を示す斜視図、
第２図は第１図の要部の平断面図である。
１・・・タービン翼、２・・・エロージョンシールド板
、２ａ・・・被膜。
出願人代理人 佐 藤 −雄
込 １ Ｚ
色 ２ 図[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a perspective view showing an embodiment of the turbine blade of the present invention;
FIG. 2 is a plan sectional view of the main part of FIG. 1. DESCRIPTION OF SYMBOLS 1... Turbine blade, 2... Erosion shield plate, 2a... Coating. Applicant's agent Sato - Ogome 1 Z Color 2 Figure
Claims (1)
系被膜が表面に形成されたエロージョンシールド板が、
前記タービン翼の少なくとも翼先端前縁部に固着されて
いることを特徴とするタービン翼。 ２、エロージョンシールド板はステライトまたはチタン
系合金であることを特徴とする特許請求の範囲第１項記
載のタービン翼。 ３、チタン系被膜はＴｉＮまたはＴｉＣであることを特
徴とする特許請求の範囲第１項記載のタービン翼。[Claims] 1. In a turbine blade made of a titanium-based alloy, an erosion shield plate having a titanium-based coating formed on its surface,
A turbine blade, characterized in that the turbine blade is fixed to at least a leading edge portion of a blade tip. 2. The turbine blade according to claim 1, wherein the erosion shield plate is made of stellite or titanium alloy. 3. The turbine blade according to claim 1, wherein the titanium-based coating is TiN or TiC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP667486A JPS62165507A (en) | 1986-01-16 | 1986-01-16 | Turbine blade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP667486A JPS62165507A (en) | 1986-01-16 | 1986-01-16 | Turbine blade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62165507A true JPS62165507A (en) | 1987-07-22 |
Family
ID=11644914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP667486A Pending JPS62165507A (en) | 1986-01-16 | 1986-01-16 | Turbine blade |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62165507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5183390A (en) * | 1991-07-10 | 1993-02-02 | Westinghouse Electric Corp. | Method of forming a trailing edge on a steam turbine blade and the blade made thereby |
-
1986
- 1986-01-16 JP JP667486A patent/JPS62165507A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5183390A (en) * | 1991-07-10 | 1993-02-02 | Westinghouse Electric Corp. | Method of forming a trailing edge on a steam turbine blade and the blade made thereby |
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