JP2008544127A - 部品に対する断熱層と金属浸食防護層とを備えた被覆系と、その被覆系の製造方法と、蒸気タービンの運転方法 - Google Patents
部品に対する断熱層と金属浸食防護層とを備えた被覆系と、その被覆系の製造方法と、蒸気タービンの運転方法 Download PDFInfo
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Abstract
Description
1.浸食防護層13の熱的噴射(溶射)時にできるだけ小さな粒度を有する吹付 け粒子の利用。
2.吹付け後における外側浸食防護層13の放射過程例えばガラス球ショットブ ラストやスチールショットブラストによる緻密化あるいは他の機械式圧縮法 や平滑法(ローリング、スライド研摩)による緻密化。
3.溶込み材による開放された孔の閉じ込め。
4.被覆系全体の熱処理。
5.最上側層あるいは金属浸食防護層全体の融解あるいは再融解。
4 基板
7 断熱層
10 結合層
13 浸食防護層
31 弁ハウジング部分
300 蒸気タービン
303 蒸気タービン
333 蒸気入口室
334 外部車室
335 内部車室
342 翼列
354 翼列
366 翼列部
Claims (34)
- 少なくとも基板(4)と、金属結合層(10)と、金属結合層(10)上の断熱層(17)、特にセラミック断熱層(7)と、断熱層(7)上の外側金属浸食防護層(13)とから成る特に蒸気タービン(300、303)における部品(1、31、334、335、342、354、357、366)の被覆層系において、
前記結合層(10)および浸食防護層(13)が、同一あるいは類似の組成を有していることを特徴とする部品の被覆層系。 - 結合層(10)および浸食防護層(13)の材料がMCrAlX合金であることを特徴とする請求項1に記載の被覆層系。
- 結合層(10)の材料特に浸食防護層(13)の材料も、29〜31重量%ニッケルと、27〜29重量%クロムと、7〜8重量%アルミニウムと、0.5〜0.7重量%イットリウムと、0.3〜0.7重量%けい素と、残りコバルトとから成っていることを特徴とする請求項1又は2に記載の被覆層系。
- 結合層(10)の材料特に浸食防護層(13)の材料も、11〜13重量%コバルトと、20〜22重量%クロムと、10.5〜11.5重量%アルミニウムと、0.3〜0.5重量%イットリウムと、1.5〜2.5重量%レニウムと、残りニッケルとから成っていることを特徴とする請求項1又は2に記載の被覆層系。
- 結合層(10)の材料特に浸食防護層(13)の材料も、24〜26重量%コバルトと、16〜18重量%クロムと、9.5〜11重量%アルミニウムと、0.3〜0.5重量%イットリウムと、1.0〜1.8重量%レニウムと、残りニッケルとから成っていることを特徴とする請求項1又は2に記載の被覆層系。
- 結合層(10)の材料特に浸食防護層(13)の材料も、11.5〜20重量%クロムと、0.3〜1.5重量%けい素と、0〜1重量%アルミニウムと、0〜4重量%イットリウムと、残り鉄とから成っていることを特徴とする請求項1又は2に記載の被覆層系。
- 結合層(10)の材料特に浸食防護層(13)の材料も、12.5〜14重量%クロムと、0.5〜1.0重量%けい素と、0.1〜0.5重量%アルミニウムと、0〜4重量%イットリウムと、残り鉄とから成っていることを特徴とする請求項6に記載の被覆層系。
- 浸食防護層(13)および結合層(10)が、鉄基、ニッケル基、クロム基あるいはコバルト基の合金、特にNiCr80/20から成っていることを特徴とする請求項1又は2に記載の被覆層系。
- 浸食防護層(13)および結合層(10)が、けい素(Si)および/又はほう素(B)を混入したニッケル・クロム合金(NiCrSiB)から成っていることを特徴とする請求項1に記載の被覆層系。
- 浸食防護層(13)および結合層(10)が、ニッケル・アルミニウム合金から成っていることを特徴とする請求項1に記載の被覆層系。
- 結合層(10)および浸食防護層(13)が、同一の組成を有していることを特徴とする請求項1ないし10のいずれか1つに記載の被覆層系。
- 浸食防護層(13)が断熱層(7)より小さな多孔性を有し、特に密度の差が少なくとも1%特に少なくとも3%であることを特徴とする請求項1に記載の被覆層系。
- 浸食防護層(13)が、浸食防護層(13)の理論密度の少なくとも96%特に98%の密度を有していることを特徴とする請求項1又は12に記載の被覆層系。
- 断熱層(7)の密度が浸食防護層(13)の理論密度の80%〜95%であることを特徴とする請求項1、12、13のいずれか1つに記載の被覆層系。
- 断熱層(7)が少なくとも部分的に多孔性を有していることを特徴とする請求項1、12、14のいずれか1つに記載の被覆層系。
- 断熱層(7)が多孔性に勾配を有していることを特徴とする請求項12、14、15のいずれか1つに記載の被覆層系。
- 断熱層(7)の多孔性が、断熱層(7)の外側部位において最も大きいことを特徴とする請求項16に記載の被覆層系。
- 断熱層(7)の多孔性が、断熱層(7)の外側部位において最も小さいことを特徴とする請求項16に記載の被覆層系。
- 金属浸食防護層(13)の材料が高い延性を有し、特に5%の破断伸び率を有していることを特徴とする請求項1、2、8、9、10のいずれか1つに記載の被覆層系。
- 被覆層系(1)がガスタービンあるいは蒸気タービン(300、303)の車室部品(31、334、335、366)であることを特徴とする請求項1に記載の被覆層系。
- 被覆層系(1)がタービン車室(366)あるいは弁ハウジング(31)であることを特徴とする請求項20に記載の被覆層系。
- 被覆層系(1)がタービン翼(342、354、357)であることを特徴とする請求項1に記載の被覆層系。
- 浸食防護層(13)が部品(1)上において特に、部品(1)への浸食小片の衝突角が60°〜120°特に70°〜110°である場所だけに存在していることを特徴とする請求項1、19、20、21、22のいずれか1つに記載の被覆層系。
- 被覆層系(1)が基板(4)から成り、該基板(4)上に断熱層(7)が存在し、前記基板(4)がニッケル基、コバルト基あるいは特に鉄基の合金で形成されていることを特徴とする請求項1、20ないし23のいずれか1つに記載の被覆層系。
- 断熱層(7)が、少なくとも部分的に、特に全部が、酸化ジルコニウム(Zr02)から成っていることを特徴とする請求項1、12、14、24のいずれか1つに記載の被覆層系。
- 断熱層(7)が、少なくとも部分的に、特に全部が、酸化チタン(Ti02)から成っていることを特徴とする請求項1、12、14、24、25のいずれか1つに記載の被覆層系。
- 被覆層系(1)が、蒸気タービン(300、303)の入口室(333)および翼列部(366)に設けられていることを特徴とする請求項1に記載の被覆層系。
- 被覆層系(1)が、蒸気タービン(300、303)の入口室(333)だけに設けられていることを特徴とする請求項1に記載の被覆層系。
- 被覆層系(1)が、蒸気タービン(300、303)の翼列部(366)だけに設けられていることを特徴とする請求項1に記載の被覆層系。
- 再加工された部品(1)において、結合層(10)と断熱層(17)と浸食防護層(13)が設けられていることを特徴とする請求項1に記載の被覆層系。
- 浸食防護層(13)が断熱層(17)上への設置後に緻密化されていることを特徴とする請求項1ないし30のいずれか1つに記載の部品の製造方法。
- 蒸気タービン(300、303)の内側表面に衝突する浸食小片と共に蒸気が、蒸気タービン(300、303)内を流れる、蒸気タービン(300、303)の運転方法において、
浸食小片が60°〜120°、特に70°〜110°の角度で衝突する蒸気タービン(300、303)の少なくとも内側表面に、特に請求項1ないし31のいずれか1つに記載の被覆系(1)が設けられていることを特徴とする蒸気タービンの運転方法。 - 浸食小片が80°〜100°、特に90°の角度で衝突する蒸気タービン(300、303)の内側表面に、特に請求項1ないし31のいずれか1つに記載の被覆系(1)が設けられていることを特徴とする請求項32に記載の方法。
- 浸食小片が80°〜100°、特に90°の角度で衝突する蒸気タービン(300、303)の内側表面だけに、特に請求項1ないし31のいずれか1つに記載の被覆系(1)が設けられていることを特徴とする請求項32又は33に記載の方法。
Applications Claiming Priority (3)
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EP05012633A EP1734145A1 (de) | 2005-06-13 | 2005-06-13 | Schichtsystem für ein Bauteil mit Wärmedämmschicht und metallischer Erosionsschutzschicht, Verfahren zur Herstellung und Verfahren zum Betreiben einer Dampfturbine |
EP05012633.3 | 2005-06-13 | ||
PCT/EP2006/060835 WO2006133980A1 (de) | 2005-06-13 | 2006-03-17 | Schichtsystem für ein bauteil mit wärmedämmschicht und metallischer erosionsschutzschicht, verfahren zur herstellung und verfahren zum betreiben einer dampfturbine |
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EP (2) | EP1734145A1 (ja) |
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JP2017082788A (ja) * | 2015-10-28 | 2017-05-18 | ゼネラル・エレクトリック・カンパニイ | ガスタービンエンジン部品及び得られる部品の遮熱コーティングを補修する方法 |
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US8047775B2 (en) | 2011-11-01 |
EP1734145A1 (de) | 2006-12-20 |
WO2006133980A1 (de) | 2006-12-21 |
CN101198713B (zh) | 2010-08-18 |
EP1891249A1 (de) | 2008-02-27 |
JP4749467B2 (ja) | 2011-08-17 |
US20090053069A1 (en) | 2009-02-26 |
CN101198713A (zh) | 2008-06-11 |
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