JPH09137264A - Method for improving peeling resistance of thermal insulation coating layer on surface of metallic substrate - Google Patents
Method for improving peeling resistance of thermal insulation coating layer on surface of metallic substrateInfo
- Publication number
- JPH09137264A JPH09137264A JP7315765A JP31576595A JPH09137264A JP H09137264 A JPH09137264 A JP H09137264A JP 7315765 A JP7315765 A JP 7315765A JP 31576595 A JP31576595 A JP 31576595A JP H09137264 A JPH09137264 A JP H09137264A
- Authority
- JP
- Japan
- Prior art keywords
- coating layer
- zirconia
- layer
- peeling resistance
- sprayed film
- 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.)
- Granted
Links
Landscapes
- Other Surface Treatments For Metallic Materials (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は強度部材としての金
属基板の表面に遮熱コーティング層により厚膜を形成す
るときに遮熱コーティング層の耐剥離性を向上させるた
めの方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for improving peel resistance of a thermal barrier coating layer when a thick film is formed on the surface of a metal substrate as a strength member by the thermal barrier coating layer.
【０００２】[0002]
【従来の技術】金属基板の表面に厚膜を一体的に形成さ
せる場合、図６に一例を示す如く、Ｎｉ基合金等の金属
基板１の表面に、ＭＣｒＡｌＹ（Ｍ：Ｎｉ、Ｃｏ、Ｆｅ
又はこれらの合金）の結合層２をプラズマ溶射し、その
上に、ジルコニア（ＺｒＯ2 、イットリアＹ2 Ｏ3 を６
〜２０％添加）をプラズマ溶射してジルコニア溶射膜３
とし、ＭＣｒＡｌＹの結合層２とジルコニアの溶射膜３
とからなる遮熱コーティング層４により厚膜を形成させ
るようにしている。2. Description of the Related Art When a thick film is integrally formed on the surface of a metal substrate, MCrAlY (M: Ni, Co, Fe) is formed on the surface of a metal substrate 1 such as a Ni-based alloy as shown in FIG.
Or a bonding layer 2 of these alloys) is plasma sprayed, and zirconia (ZrO 2 , yttria Y 2 O 3
˜20% added) plasma sprayed to zirconia sprayed film 3
And a bonding layer 2 of MCrAlY and a sprayed film 3 of zirconia.
A thick film is formed by the thermal barrier coating layer 4 composed of.
【０００３】しかし、上記金属基板１の表面にＭＣｒＡ
ｌＹの結合層２をプラズマ溶射し、その上にプラズマ溶
射によるジルコニア溶射膜３を施して厚膜を形成するこ
とは、施工は簡単であるが、ＭＣｒＡｌＹの結合層２と
ジルコニアの溶射膜３からなる遮熱コーティング層４と
金属基板１との界面の応力状態は、図２における○印か
ら推定できる如く残留応力が大きい状態にあり、遮熱コ
ーティング層４は剥離し易かった。However, MCrA is formed on the surface of the metal substrate 1.
It is easy to construct the thick layer by plasma-spraying the bonding layer 2 of LY and then spraying the zirconia sprayed film 3 by plasma spraying on the bonding layer 2 of MCrAlY and the sprayed film 3 of zirconia. The stress state at the interface between the thermal barrier coating layer 4 and the metal substrate 1 was such that the residual stress was large as can be estimated from the mark ◯ in FIG. 2, and the thermal barrier coating layer 4 was easily peeled off.
【０００４】そのため、従来では、遮熱コーティング層
４の耐剥離性を向上させるために図７に示す如く、ジル
コニア溶射膜３に細かなクラック５を入れることにより
残留応力を緩和させて耐剥離性を向上させる方法などが
採られており、クラック５を入れる方法として、レーザ
ビーム６を急激に照射して熱を加えることによりクラッ
ク５を生じさせるというレーザクラッキング処理が採ら
れている。Therefore, conventionally, in order to improve the peeling resistance of the thermal barrier coating layer 4, as shown in FIG. 7, fine cracks 5 are formed in the zirconia sprayed film 3 to relieve the residual stress and peel resistance. As a method of introducing the crack 5, a laser cracking treatment of causing the crack 5 by rapidly irradiating the laser beam 6 and applying heat is adopted.
【０００５】[0005]
【発明が解決しようとする課題】ところが、上記ジルコ
ニア溶射膜３にクラック５を入れることにより耐剥離性
を向上させるようにする従来の方法では、厚膜の表面に
クラック５が生じていることから、金属基板１を回転体
の部品に適用する場合に好ましくないという事態が生じ
ている。However, in the conventional method in which cracks 5 are formed in the zirconia sprayed film 3 to improve the peel resistance, cracks 5 are formed on the surface of the thick film. However, there is a situation in which it is not preferable when the metal substrate 1 is applied to parts of a rotating body.
【０００６】そこで、本発明は、ジルコニア溶射膜にク
ラックを入れないで且つ残留応力を解放させて耐剥離性
を向上させるようにしようとするものである。Therefore, the present invention is intended to improve the peeling resistance by releasing the residual stress without cracking the zirconia sprayed film.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記課題を解
決するために、金属基板の表面にＭＣｒＡｌＹ（Ｍ：Ｎ
ｉ、Ｃｏ、Ｆｅ又はこれらの合金）の結合層を溶射し、
その上にジルコニア（ＺｒＯ2 、イットリアＹ2 Ｏ3 を
６〜２０％添加）を溶射して、該ＭＣｒＡｌＹの結合層
とジルコニアの溶射膜からなる遮熱コーティング層を施
し、該遮熱コーティング層の表面に、該ジルコニア溶射
膜にクラックが入らないようレーザ出力を５００〜１５
００Ｗ、加工速度を２〜８m/min の範囲で被照射層の大
きさに応じ変えながらレーザ照射処理をし、遮熱コーテ
ィング層と金属基板との界面の残留応力を解放して該遮
熱コーティング層の耐剥離性を向上させるようにする方
法とする。In order to solve the above-mentioned problems, the present invention provides MCrAlY (M: N) on the surface of a metal substrate.
i, Co, Fe or alloys thereof) by spraying
Zirconia thereon (ZrO 2, yttria Y 2 O 3 additive 6-20%) by spraying and subjected to a thermal coating layer barrier consists sprayed film tie layer and the zirconia of the MCrAlY, the shielding heat coating layer The laser output is 500 to 15 so that the surface of the zirconia sprayed film is not cracked.
Laser irradiation is performed while changing the processing speed to 00 W and the processing speed in the range of 2 to 8 m / min according to the size of the layer to be irradiated to release residual stress at the interface between the thermal barrier coating layer and the metal substrate. The method is to improve the peel resistance of the layer.
【０００８】金属基板の表面にＭＣｒＡｌＹの結合層を
溶射し、その上にジルコニアを溶射して、該ジルコニア
の溶射膜にクラックが入らないで且つ応力解放の効果が
得られる条件でジルコニア溶射膜にレーザ照射処理を施
すと、レーザ出力により熱が加えられて残留応力が解放
され、ジルコニア溶射膜にクラックを生じさせることな
く耐剥離性を向上させることができる。[0008] A bonding layer of MCrAlY is sprayed on the surface of a metal substrate, and zirconia is sprayed on the bonding layer to form a zirconia sprayed film under the conditions that the zirconia sprayed film does not crack and a stress releasing effect is obtained. When the laser irradiation process is performed, heat is applied by the laser output to release the residual stress, and the peel resistance can be improved without causing cracks in the zirconia sprayed film.
【０００９】又、上記ジルコニア溶射膜にレーザ出力５
００〜１５００Ｗ、加工速度２〜８m/min の条件でレー
ザ照射処理を施すとき、溶射膜の気孔率を高くしておく
ことにより応力解放効果が高められて、クラックが入り
難くなる。A laser output 5 is applied to the zirconia sprayed film.
When laser irradiation is performed under the conditions of 00 to 1500 W and processing speed of 2 to 8 m / min, the stress releasing effect is enhanced by increasing the porosity of the sprayed film, and cracks are less likely to occur.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を図面
を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１は本発明の実施の一形態として、比較
的小型の供試材Ｉに対してレーザ照射を実施している状
態を示すもので、図６に示した場合と同様に金属基板１
の表面に、ＭＣｒＡｌＹ（Ｍ：Ｎｉ、Ｃｏ、Ｆｅ又はこ
れらの合金）の結合層２をプラズマ溶射して、その上に
ジルコニア（ＺｒＯ2 、イットリアＹ2 Ｏ3 を６〜２０
％添加）の溶射膜３をプラズマ溶射により施し、上記Ｍ
ＣｒＡｌＹの結合層２とジルコニア溶射膜３からなる遮
熱コーティング層４で厚膜を形成するようにした構成に
おいて、表層のジルコニア溶射膜３にクラックが生じな
いようにレーザ照射処理をし、該ジルコニア溶射膜３に
クラックを生じさせることなく、且つ遮熱コーティング
層４と金属基板１との界面の残留応力を解放させて耐剥
離性を向上させるようにする。FIG. 1 shows, as an embodiment of the present invention, a state in which laser irradiation is performed on a comparatively small sample material I, which is similar to the case shown in FIG. 1
A bonding layer 2 of MCrAlY (M: Ni, Co, Fe or an alloy thereof) is plasma-sprayed on the surface of, and zirconia (ZrO 2 , yttria Y 2 O 3 is added in an amount of 6 to 20).
% Addition) of the thermal sprayed film 3 by plasma spraying,
In a structure in which a thick film is formed by a thermal barrier coating layer 4 composed of a CrAlY bonding layer 2 and a zirconia sprayed film 3, a laser irradiation process is performed so that the surface zirconia sprayed film 3 is not cracked, and the zirconia is irradiated. The peeling resistance is improved without causing cracks in the sprayed film 3 and releasing the residual stress at the interface between the thermal barrier coating layer 4 and the metal substrate 1.
【００１２】上記レーザ照射処理を施すことにより上述
の如き応力解放の効果が得られる条件としては、レーザ
照射条件と被照射層（溶射膜）の状態とがある。The conditions under which the above-mentioned stress relief effect can be obtained by performing the laser irradiation treatment are the laser irradiation condition and the state of the layer to be irradiated (sprayed film).
【００１３】クラックが入らないレーザ照射条件は、レ
ーザ出力と加工速度（照射時間、すなわち、レーザ照射
時に供試材を移動させる速度）であり、レーザ出力を５
００〜１５００Ｗ、加工速度を２〜８m/min とする。供
試材Ｉの大きさに応じて上記レーザ出力と加工速度を適
宜変更して、ＺｒＯ2 溶射膜３にクラックが入らない条
件でレーザ照射処理を施すようにするが、供試材Ｉが大
きい場合は、レーザ照射しても熱が逃げ易くて冷却が速
くなりクラックが入り易くなるので、レーザ出力を大き
くしたり、加工速度を遅くするようにし、又、供試材Ｉ
が小さい場合は、熱が逃げにくく、冷却されにくいの
で、レーザ出力を小さくするか、加工速度を速くするよ
うにする。The laser irradiation conditions under which cracks do not occur are the laser output and the processing speed (irradiation time, that is, the speed at which the test material is moved during laser irradiation).
The processing speed is set to 0 to 1500 W and the processing speed is set to 2 to 8 m / min. The laser output and the processing speed are appropriately changed according to the size of the sample material I to perform the laser irradiation treatment under the condition that the ZrO 2 sprayed film 3 is not cracked, but the sample material I is large. In this case, even if laser irradiation is performed, heat easily escapes, cooling becomes fast, and cracks easily occur. Therefore, the laser output should be increased or the processing speed should be slowed down.
If is smaller, heat is less likely to escape and is less likely to be cooled. Therefore, the laser output should be reduced or the processing speed should be increased.
【００１４】又、被照射層の状態としては、気孔率が応
力解放の効果に関係していて、気孔率が高いほどクラッ
クが入らないことが後述する実施例で確認されている。
ここで、気孔率とは、粉末を半溶融状態でぶつけて付け
て行く溶射時に残る隙間（気孔）の全体に対する割り合
いをいい、気孔率を高くするには、例えば溶射時のエネ
ルギー（電流、電圧、ガス流量で決められる）を小さく
することにより達成できる。この場合に電流、電圧を小
さく、ガス流量を大きくすることによりエネルギーを小
さくできるが、エネルギーが小さくなりすぎると、ほと
んど粉末が溶けず、コーティングできないことになる。As for the state of the layer to be irradiated, the porosity is related to the stress releasing effect, and it has been confirmed in the examples described later that the higher the porosity, the less cracks are formed.
Here, the porosity refers to the ratio of the entire gap (pores) remaining during thermal spraying by hitting the powder in a semi-molten state, and to increase the porosity, for example, energy during spraying (current, current, (Determined by voltage and gas flow rate). In this case, the energy can be reduced by decreasing the current and voltage and increasing the gas flow rate. However, if the energy is too low, the powder hardly melts and coating cannot be performed.
【００１５】したがって、本発明では、ジルコニア溶射
膜３にレーザ出力と加工速度を一定条件としてレーザ照
射処理を施し、又、溶射膜は気孔率が高いものとする。Therefore, in the present invention, the zirconia sprayed film 3 is subjected to the laser irradiation treatment under the constant conditions of the laser output and the processing speed, and the sprayed film has a high porosity.
【００１６】[0016]
【実施例】次に、本発明者等の行った実験結果について
説明する。Next, the results of experiments conducted by the present inventors will be described.
【００１７】本発明者等は、１つの供試材として、イン
コネル７１８を素材とする縦、横、高さが１００mm×５
０mm×５mmの大きさの金属基板１の表面に、ＭＣｒＡｌ
Ｙ（Ｍ：Ｎｉ、Ｃｏ、Ｆｅ又はこれらの合金）の一例と
してＮｉＣｒＡｌＹの結合層２を膜厚１００μm （０．
１mm）となるようプラズマ溶射し、更に、その上にＺｒ
Ｏ2 を膜厚２００μm （０．２mm）となるようプラズマ
溶射して溶射膜３を施してなる比較的小型の供試材Ｉを
作って用い、この供試材Ｉに、表層のＺｒＯ2溶射膜３
にクラックが入らない条件でレーザ照射処理を施すよう
にした。すなわち、上記の供試材Ｉに対して、レーザ出
力を５００Ｗ、加工速度（レーザ照射時に供試材を移動
させる速度）を５m/min 、焦点はずし距離ｌを１５mm、
オシレーション幅ｗを５．５mm、重ね代を０．５mmとし
て実施した。又、被照射層（溶射膜）の状態としては、
気孔率の高い状態とした。The inventors of the present invention, as one of the test materials, use Inconel 718 as a material, and have a length, width, and height of 100 mm × 5.
On the surface of the metal substrate 1 having a size of 0 mm × 5 mm, MCrAl
As an example of Y (M: Ni, Co, Fe or alloys thereof), a NiCrAlY bonding layer 2 having a film thickness of 100 μm (0.
1mm) plasma spraying, and then Zr
A comparatively small sample material I made by plasma spraying O 2 to a film thickness of 200 μm (0.2 mm) and applying the sprayed film 3 was used, and this sample material I was sprayed with ZrO 2 of the surface layer. Membrane 3
The laser irradiation process was performed under the condition that no cracks were generated in the. That is, with respect to the above-described sample material I, the laser output was 500 W, the processing speed (the speed of moving the sample material during laser irradiation) was 5 m / min, the defocusing distance 1 was 15 mm,
The oscillation width w was set to 5.5 mm and the stacking margin was set to 0.5 mm. The state of the irradiated layer (sprayed film) is
The state was set to have a high porosity.
【００１８】レーザ照射法は、図１に示すように、レー
ザビーム６を集光レンズ７を通して固定ミラー８で反射
させ、反射されたレーザビーム６をオシレートミラー９
で反射させて、ＺｒＯ2 溶射膜３の表面に所定のオシレ
ーション幅でオシレートさせながら照射させるように
し、供試材Ｉを加工テーブル１０上に載せて加工テーブ
ル１０を加工速度に合わせて移動させ、所要の重ね代で
レーザ照射処理を施すようにした。In the laser irradiation method, as shown in FIG. 1, the laser beam 6 is reflected by a fixed mirror 8 through a condenser lens 7, and the reflected laser beam 6 is oscillated by a mirror 9.
To irradiate the surface of the ZrO 2 sprayed film 3 while oscillating the ZrO 2 sprayed film with a predetermined oscillation width, and place the test material I on the processing table 10 and move the processing table 10 according to the processing speed. The laser irradiation process was performed at the required overlap margin.
【００１９】供試材Ｉの表面のＺｒＯ2 溶射膜３に、上
記レーザ照射条件でレーザ照射処理した結果、図２に△
印で示す如く、レーザ照射処理を施していない○印の場
合に比して遮熱コーティング層４の残留応力が減少して
いる効果が認められた。The ZrO 2 sprayed film 3 on the surface of the test material I was subjected to the laser irradiation treatment under the above laser irradiation conditions.
As indicated by the mark, the effect of reducing the residual stress of the thermal barrier coating layer 4 was recognized as compared with the case of the mark ◯ that was not subjected to the laser irradiation treatment.
【００２０】又、本発明者等は上記供試材Ｉとして、Ｎ
ｉＣｒＡｌＹの結合層２とＺｒＯ2の溶射膜３の施工法
を種々変えたもの、すなわち、上記ＮｉＣｒＡｌＹの結
合層２とＺｒＯ2 溶射膜３の両方を減圧プラズマ溶射
（ＶＰＳ）としたもの、両方とも大気中プラズマ溶射
（ＡＰＳ）としたもの、あるいは、いずれか一方を減圧
プラズマ溶射、他方を大気中プラズマ溶射としたものを
別々に作り、これら異なる施工法による供試材Ｉについ
て上記ＺｒＯ2 溶射膜３にクラックを入れないで残留応
力を解放できるような条件でレーザ照射処理を施した場
合と、レーザ照射処理を施していない場合の遮熱コーテ
ィング層４の耐剥離性について調べたところ、表１に示
すような結果が得られた。In addition, the inventors of the present invention designated the test material I as N
A method in which the bonding layer 2 of iCrAlY and the sprayed film 3 of ZrO 2 are variously changed, that is, both the bonding layer 2 of NiCrAlY and the ZrO 2 sprayed film 3 are subjected to low pressure plasma spraying (VPS), both of which are A ZrO 2 sprayed film was prepared by separately performing an atmospheric plasma spraying (APS) process or a low pressure plasma spraying process on one side and an atmospheric plasma spraying process on the other side, and using a test material I prepared by these different construction methods. The peel resistance of the thermal barrier coating layer 4 was examined under conditions where the residual stress could be released without cracking in No. 3 and when the laser irradiation process was not performed. The results shown in are obtained.
【００２１】[0021]
【表１】 表１中、ＮＯ．１はＮｉＣｒＡｌＹの結合層２とＺｒＯ
2 の溶射膜３をともに減圧プラズマ溶射（ＶＰＳ）とし
たもの、ＮＯ．２はＮｉＣｒＡｌＹの結合層２を減圧プ
ラズマ溶射（ＶＰＳ）、ＺｒＯ2 の溶射膜３を大気中プ
ラズマ溶射（ＡＰＳ）としたもの、ＮＯ．３はＮｉＣｒ
ＡｌＹの結合層２を大気中プラズマ溶射（ＡＰＳ）、Ｚ
ｒＯ2 の溶射膜３を減圧プラズマ溶射（ＶＰＳ）とした
もの、ＮＯ．４はＮｉＣｒＡｌＹの結合層２とＺｒＯ2
の溶射膜３をともに大気中プラズマ溶射（ＡＰＳ）とし
たものである。[Table 1] In Table 1, NO. 1 is a NiCrAlY bonding layer 2 and ZrO
The sprayed film 3 of No. 2 is a low pressure plasma sprayed (VPS), NO. No. 2 is a NiCrAlY bonding layer 2 under reduced pressure plasma spraying (VPS) and a ZrO 2 sprayed film 3 under atmospheric plasma spraying (APS). 3 is NiCr
The bonding layer 2 of AlY is plasma sprayed in the atmosphere (APS), Z
The sprayed film 3 of rO 2 is a low pressure plasma sprayed (VPS), NO. 4 is a NiCrAlY bonding layer 2 and ZrO 2
Both of the thermal sprayed coatings 3 are plasma sprayed in the atmosphere (APS).
【００２２】たとえば、ＮＯ．２の場合では、レーザ照
射処理なしの場合は熱サイクル数が１１０回目で剥離が
発生したのに対し、レーザ照射処理をすると、１４０回
以上まで剥離しないことが確認された。表１から明らか
なように遮熱コーティング層４の施工法の種類に関係な
くレーザ照射処理を施すことにより応力解放の効果によ
り耐剥離性が向上していることがわかり、レーザ照射の
効果があることが認められる。For example, in the case of NO. In the case of No. 2, the peeling occurred at the 110th thermal cycle without the laser irradiation treatment, but it was confirmed that the peeling did not occur up to 140 times or more when the laser irradiation treatment was performed. As is clear from Table 1, regardless of the type of construction method of the thermal barrier coating layer 4, it is found that the peeling resistance is improved by the effect of stress release by performing the laser irradiation treatment, and there is the effect of laser irradiation. Is recognized.
【００２３】又、被照射層の状態として、気孔率が高い
ものほどクラックが入らないことが確認され、気孔率が
応力解放の効果に関係していることが判明した。It was also confirmed that the higher the porosity of the layer to be irradiated, the less the cracks formed, and that the porosity was related to the stress relief effect.
【００２４】図３、図４及び図５はレーザ照射条件と気
孔率の関係を示すもので、レーザ照射条件として、レー
ザ出力（５００〜１５００Ｗ）と加工速度（２〜８m/mi
n ）の関係において、図３は気孔率を１０％とした場合
を示すもので、○印はクラックが入った場合、●印はク
ラックが入らなかった場合を示す。図４は気孔率を２０
％とした場合を、又、図５は気孔率を３０％とした場合
をそれぞれ示すものであるが、気孔率が高いほどクラッ
クが入らないことがわかる。このことから、レーザ出力
と加工速度を変え且つ気孔率をコントロールすることに
よりクラックが入らないでレーザ照射により応力除去を
行い、寿命を向上させることができる。FIGS. 3, 4 and 5 show the relationship between laser irradiation conditions and porosity. As laser irradiation conditions, laser output (500-1500 W) and processing speed (2-8 m / mi) were used.
In the relationship of n), FIG. 3 shows the case where the porosity is 10%, and the mark “◯” shows the case where a crack is formed and the mark “●” shows the case where no crack is formed. Figure 4 shows a porosity of 20
%, And FIG. 5 shows the case where the porosity is 30%, respectively. It can be seen that the higher the porosity, the less cracks are formed. From this, by changing the laser output and the processing speed and controlling the porosity, stress can be removed by laser irradiation without cracks and the life can be improved.
【００２５】なお、本発明者等は、供試材Ｉとして、Ｎ
ｉＣｒＡｌＹ以外にＭＣｒＡｌＹ（Ｍ：Ｎｉ、Ｃｏ、Ｆ
ｅ又はこれらの合金）の結合層をプラズマ溶射したもの
でも実験したが、同様な結果が得られた。The inventors of the present invention have selected N as the test material I.
In addition to iCrAlY, MCrAlY (M: Ni, Co, F
Experiments were also performed with plasma sprayed bonding layers of e or these alloys), but similar results were obtained.
【００２６】[0026]
【発明の効果】以上述べた如く、本発明の遮熱コーティ
ング層の耐剥離性向上方法によれば、金属基板の表面
に、ＭＣｒＡｌＹ（Ｍ：Ｎｉ、Ｃｏ、Ｆｅ又はこれらの
合金）の結合層を溶射して、その上に、ジルコニア（Ｚ
ｒＯ2 、イットリアＹ2 Ｏ3 を６〜２０％添加）を溶射
して、ＭＣｒＡｌＹの結合層とジルコニアの溶射膜から
なる遮熱コーティング層の残留応力を解放するために、
ジルコニア溶射膜に、該ジルコニア溶射膜にクラックが
入らないようにレーザ出力５００〜１５００Ｗ、加工速
度２〜８m/min の条件でレーザを照射して熱処理するの
で、ジルコニア溶射膜にクラックを入れることなく遮熱
コーティング層の残留応力を解放させて、耐剥離性を向
上させることができ、回転体等に適用して、より信頼性
の高いものとすることができ、又、溶射膜を気孔率が高
い状態にすることにより、よりクラックが入らないよう
にすることができる。As described above, according to the method for improving the peeling resistance of the thermal barrier coating layer of the present invention, the bonding layer of MCrAlY (M: Ni, Co, Fe or their alloys) is formed on the surface of the metal substrate. Sprayed on the zirconia (Z
rO 2 and yttria Y 2 O 3 are added by 6 to 20%) to release residual stress of the thermal barrier coating layer composed of the bonding layer of MCrAlY and the sprayed film of zirconia.
The zirconia sprayed film is heat-treated by irradiating it with a laser at a laser output of 500 to 1500 W and a processing speed of 2 to 8 m / min so that the zirconia sprayed film does not crack. The residual stress of the thermal barrier coating layer can be released to improve the peeling resistance, and it can be applied to the rotating body etc. to have higher reliability. By making the height higher, it is possible to prevent cracks from entering.
【図１】本発明の実施の一形態として供試材にレーザ照
射処理をしている状態を示す概略斜視図である。FIG. 1 is a schematic perspective view showing a state in which a sample material is subjected to laser irradiation processing as one embodiment of the present invention.
【図２】遮熱コーティング層の応力状態とこれに及ぼす
レーザ照射の効果を示す図である。FIG. 2 is a diagram showing a stress state of a thermal barrier coating layer and an effect of laser irradiation on the stress state.
【図３】気孔率を１０％とした場合にクラックが入らな
い状態を示す図である。FIG. 3 is a diagram showing a state in which no cracks are formed when the porosity is 10%.
【図４】気孔率を２０％とした場合にクラックが入らな
い状態を示す図である。FIG. 4 is a diagram showing a state in which no cracks are formed when the porosity is 20%.
【図５】気孔率を３０％とした場合にクラックが入らな
い状態を示す図である。FIG. 5 is a diagram showing a state in which no cracks are formed when the porosity is 30%.
【図６】従来の金属基板の厚膜の形成する状態を示す概
略図である。FIG. 6 is a schematic view showing a state in which a thick film of a conventional metal substrate is formed.
【図７】図６に示すジルコニアの溶射膜にクラックを生
じさせるようにする従来の方法を示す概略図である。FIG. 7 is a schematic view showing a conventional method for causing cracks in the zirconia sprayed film shown in FIG.
Ｉ 供試材 １ 金属基板 ２ ＭＣｒＡｌＹ（Ｍ：Ｎｉ、Ｃｏ、Ｆｅ又はこれらの
合金）の結合層 ３ ジルコニアの溶射膜 ４ 遮熱コーティング層 ６ レーザビーム ９ オシレートミラー １０ 加工テーブルI Specimen 1 Metal substrate 2 Bonding layer of MCrAlY (M: Ni, Co, Fe or alloys thereof) 3 Thermal spray coating of zirconia 4 Thermal barrier coating layer 6 Laser beam 9 Oscillating mirror 10 Processing table
フロントページの続き (72)発明者 結城 正弘 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社技術研究所内 (72)発明者 森重 徳男 神奈川県横浜市磯子区新中原町１番地 石 川島播磨重工業株式会社技術研究所内Front page continued (72) Inventor Masahiro Yuki 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishi Kawashima Harima Heavy Industries, Ltd. Technical Research Institute (72) Inventor Tokio Morishige, Shin-Nakahara-cho, Isogo-ku, Yokohama, Kanagawa Kawashima Harima Heavy Industries Ltd. Technical Research Center
Claims (2)
ｉ、Ｃｏ、Ｆｅ又はこれらの合金）の結合層を溶射し、
その上にジルコニア（ＺｒＯ2 、イットリアＹ2 Ｏ3 を
６〜２０％添加）を溶射して、該ＭＣｒＡｌＹの結合層
とジルコニアの溶射膜からなる遮熱コーティング層を施
し、該遮熱コーティング層の表面に、レーザ出力を５０
０〜１５００Ｗ、加工速度を２〜８m/min の範囲で被照
射層の大きさに応じて変えながらレーザ照射処理を施
し、遮熱コーティング層と金属基板との界面の残留応力
を解放して該遮熱コーティング層の耐剥離性を向上させ
るようにすることを特徴とする金属基板表面の遮熱コー
ティング層の耐剥離性向上方法。1. The surface of a metal substrate is MCrAlY (M: N).
i, Co, Fe or alloys thereof) by spraying
Zirconia thereon (ZrO 2, yttria Y 2 O 3 additive 6-20%) by spraying and subjected to a thermal coating layer barrier consists sprayed film tie layer and the zirconia of the MCrAlY, the shielding heat coating layer A laser output of 50 on the surface
Laser irradiation is performed while changing the processing speed in the range of 0 to 1500 W and the range of 2 to 8 m / min according to the size of the layer to be irradiated to release residual stress at the interface between the thermal barrier coating layer and the metal substrate. A method for improving peeling resistance of a thermal barrier coating layer on a surface of a metal substrate, which comprises improving the peeling resistance of the thermal barrier coating layer.
ーザ照射処理を施す請求項１記載の金属基板表面の遮熱
コーティング層の耐剥離性向上方法。2. The method for improving peeling resistance of a thermal barrier coating layer on a surface of a metal substrate according to claim 1, wherein the laser irradiation treatment is performed by increasing the porosity of the zirconia sprayed film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31576595A JP3521583B2 (en) | 1995-11-10 | 1995-11-10 | Method of improving peel resistance of thermal barrier coating layer on metal substrate surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31576595A JP3521583B2 (en) | 1995-11-10 | 1995-11-10 | Method of improving peel resistance of thermal barrier coating layer on metal substrate surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09137264A true JPH09137264A (en) | 1997-05-27 |
| JP3521583B2 JP3521583B2 (en) | 2004-04-19 |
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ID=18069281
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31576595A Expired - Fee Related JP3521583B2 (en) | 1995-11-10 | 1995-11-10 | Method of improving peel resistance of thermal barrier coating layer on metal substrate surface |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11229109A (en) * | 1997-12-19 | 1999-08-24 | United Technol Corp <Utc> | Heat resistant top coat and coating system |
-
1995
- 1995-11-10 JP JP31576595A patent/JP3521583B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11229109A (en) * | 1997-12-19 | 1999-08-24 | United Technol Corp <Utc> | Heat resistant top coat and coating system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3521583B2 (en) | 2004-04-19 |
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