JPH08313192A - Spray coating film for heat resistant member - Google Patents
Spray coating film for heat resistant memberInfo
- Publication number
- JPH08313192A JPH08313192A JP12032295A JP12032295A JPH08313192A JP H08313192 A JPH08313192 A JP H08313192A JP 12032295 A JP12032295 A JP 12032295A JP 12032295 A JP12032295 A JP 12032295A JP H08313192 A JPH08313192 A JP H08313192A
- Authority
- JP
- Japan
- Prior art keywords
- spray coating
- coating layer
- nicr
- film layer
- heat
- 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
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は例えばごみ焼却炉におけ
る熱交換器の伝熱管やガスタービンブレードなどの耐熱
部材の溶射皮膜に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermal spray coating of heat-resistant members such as heat transfer tubes of heat exchangers and gas turbine blades in refuse incinerators.
【０００２】[0002]
【従来の技術】近年、都市ごみは高カロリー化しており
その焼却温度も高温化している。そのため、たとえば都
市ごみなどを焼却するごみ焼却炉に配置される熱交換器
の伝熱管などには、その表面にステンレスプロテクタ
ー、セラミックスプロテクターまたはセラミックスキャ
スターなどの塗布や溶射、あるいは自溶合金の溶射を行
い、伝熱管の腐食防止をするものがある。2. Description of the Related Art In recent years, municipal waste has become highly caloric and its incineration temperature has become high. Therefore, for example, heat transfer tubes of heat exchangers that are placed in a refuse incinerator that incinerates municipal waste, etc. should be coated or sprayed with stainless steel protector, ceramic protector or ceramic caster, or sprayed with self-fluxing alloy on its surface. There is a thing to prevent corrosion of the heat transfer tube.
【０００３】[0003]
【発明が解決しようとする課題】上記ステンレスプロテ
クターは高温強度が低いため肉厚を厚くする必要があ
り、このことにより熱交換率を低下させるという問題が
ある。またセラミックスプロテクターやセラミックスキ
ャスターは熱伝導率が悪く、たとえば伝熱管では全表面
に設けることができないため、部分的な腐食が激しくな
るという問題があった。さらに、自溶合金の溶射の場合
には、溶射後に再溶融処理が必要なため、これにより熱
歪みを受け、これを防止するには大掛かりな拘束治具、
または歪み矯正作業が必要であった。Since the above stainless protector has low strength at high temperature, it is necessary to make the wall thickness thicker, which causes a problem of lowering the heat exchange rate. Further, the ceramic protector and the ceramic caster have poor thermal conductivity, and for example, a heat transfer tube cannot be provided on the entire surface, so that there is a problem that local corrosion becomes severe. Furthermore, in the case of thermal spraying of a self-fluxing alloy, re-melting treatment is required after thermal spraying, which causes thermal strain and a large restraint jig to prevent this.
Or distortion correction work was required.
【０００４】本発明は、上記問題点を解決して、高温強
度も高く、熱伝導も良好で、再溶融処理が不要で、高温
腐食を防止できる耐熱部材の溶射皮膜を提供することを
目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a thermal spray coating of a heat resistant member which has high strength at high temperature, good heat conduction, does not require remelting treatment and can prevent high temperature corrosion. To do.
【０００５】[0005]
【課題を解決するための手段】上記問題点を解決するた
めに本発明は、Ｆｅ系耐熱素材の表面に高速火炎溶射さ
れた耐熱溶射皮膜を、外周に形成されたＺｒＯ2 −（２
５ｗｔ％〜７５ｗｔ％）ＮｉＣｒ合金よりなる外周皮膜
層と、この外周皮膜層とＦｅ系耐熱素材との間に介在さ
れたＮｉＣｒ合金からなる緩衝皮膜層とで構成したもの
である。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a ZrO 2- (2) formed on the outer periphery of a heat-resistant thermal spray coating of high-speed flame sprayed on the surface of a Fe-based heat-resistant material.
5 wt% to 75 wt%) NiCr alloy outer peripheral coating layer, and a NiCr alloy buffer coating layer interposed between the outer peripheral coating layer and the Fe-based heat-resistant material.
【０００６】[0006]
【作用】上記構成によれば、Ｆｅ系耐熱素材上に溶射さ
れて溶射皮膜を形成するＺｒＯ 2 −ＮｉＣｒ合金からな
る外周皮膜層と、ＮｉＣｒ合金からなる緩衝皮膜層は、
共に耐高温性、耐食性、耐摩耗性に優れ、高温強度も高
いので、高温腐食による減肉量を大幅に減少させること
ができ、熱伝導率の大幅な低下もなく、再溶融も不要と
なる。またＦｅ系管体と外周皮膜層との間に緩衝皮膜層
を介在させたので、熱伝導率が幾分低いＺｒＯ2 に起因
して外周皮膜層に温度むらが生じることがあっても、温
度むらにより生じる熱応力を緩衝皮膜層で吸収させるこ
とができるので、ひび割れを防止することができる。さ
らに、仮に何らかの原因でＺｒＯ2−ＮｉＣｒ外周皮膜
層にひび割れが生じたり腐食が生じたりした場合でも、
内側に耐食性を有するＮｉＣｒ緩衝皮膜層が溶射されて
いるので、これによってＦｅ系耐熱素材の腐食を確実に
防止することができる。[Function] According to the above-mentioned constitution, the Fe-based heat-resistant material is sprayed
Which forms a thermal spray coating 2-Made of NiCr alloy
The outer peripheral coating layer and the buffer coating layer made of NiCr alloy are
Both have excellent high temperature resistance, corrosion resistance, and wear resistance, and high temperature strength.
Therefore, the amount of metal loss due to high temperature corrosion should be significantly reduced.
The heat conductivity does not drop significantly, and remelting is not necessary.
Become. In addition, a buffer film layer is provided between the Fe-based tubular body and the outer film layer.
Since ZrO has been interposed, the thermal conductivity is somewhat low.2Due to
Even if the outer peripheral coating layer has uneven temperature,
The buffer film should absorb the thermal stress caused by unevenness.
Since it is possible to prevent cracks. It
In addition, if for some reason ZrO2-NiCr outer coating
Even if the layer is cracked or corroded,
The corrosion resistant NiCr buffer coating layer is sprayed on the inside
As a result, this ensures the corrosion of the Fe-based heat-resistant material.
Can be prevented.
【０００７】[0007]
【実施例】以下、本発明に係るごみ焼却炉の熱交換器に
設けられる伝熱管の溶射皮膜の一実施例を図面に基いて
説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a thermal spray coating of a heat transfer tube provided in a heat exchanger of a refuse incinerator according to the present invention will be described below with reference to the drawings.
【０００８】図２に示すように、都市ごみなどを焼却す
る焼却炉の内部には、煙道を囲む冷却壁１を構成する水
管壁用伝熱管２や、熱交換器３に配設された熱回収用伝
熱管４および過熱用蒸気管５に、本発明に係る溶射皮膜
が形成されている。As shown in FIG. 2, inside the incinerator that incinerates municipal solid waste, a heat transfer tube 2 for a water tube wall that constitutes a cooling wall 1 that surrounds a flue and a heat exchanger 3 are arranged. The thermal spray coating according to the present invention is formed on the heat recovery heat transfer tube 4 and the superheating steam tube 5.
【０００９】すなわち、図１（ａ），（ｂ）に示すよう
に、Ｆｅ系耐熱素材の一例である水管壁用伝熱管２およ
び熱回収用伝熱管４ならび過熱蒸気管５には、それぞれ
軟鋼製の管体６と、該管体６の外周に固着された耐熱溶
射皮膜７とから構成され、該耐熱溶射皮膜７は、外周側
で燃焼ガスと接触する面に溶射された外周皮膜層７Ａ
と、外周皮膜層７Ａと管体６との緩衝を目的として溶射
された緩衝皮膜層７Ｂとで構成されている。That is, as shown in FIGS. 1 (a) and 1 (b), the water pipe wall heat transfer pipe 2 and the heat recovery heat transfer pipe 4 and the superheated steam pipe 5, which are examples of Fe-based heat-resistant materials, are respectively provided. It is composed of a mild steel pipe body 6 and a heat-resistant thermal spray coating 7 fixed to the outer periphery of the pipe body 6. The heat-resistant thermal spray coating 7 is an outer peripheral coating layer spray-coated on the outer peripheral surface in contact with combustion gas. 7A
And a buffer coating layer 7B sprayed for the purpose of buffering the outer peripheral coating layer 7A and the tubular body 6.
【００１０】前記外周皮膜層７Ａは、耐熱および耐高温
腐食を目的として、ＺｒＯ2 −ＮｉＣｒ合金を緩衝皮膜
層７Ｂ上に爆発溶射（高速火炎溶射の一例）されてたと
えば厚さ０．１ｍｍ程度に形成されたものである。Ｚｒ
Ｏ2 −ＮｉＣｒ合金の成分は、（７５ｗｔ％〜２５ｗｔ
％）ＺｒＯ2 −（２５ｗｔ％〜７５ｗｔ％）ＮｉＣｒの
ものが使用され、さらにここで含有されるＮｉＣｒ合金
は、８０ｗｔ％Ｎｉ−２０ｗｔ％Ｃｒのものが使用され
る。For the purpose of heat resistance and high temperature corrosion resistance, the outer peripheral coating layer 7A is explosively sprayed (an example of high speed flame spraying) with a ZrO 2 -NiCr alloy onto the buffer coating layer 7B to have a thickness of about 0.1 mm. It was formed. Zr
The composition of the O 2 —NiCr alloy is (75 wt% to 25 wt
%) ZrO 2- (25 wt% to 75 wt%) NiCr is used, and the NiCr alloy contained here is 80 wt% Ni-20 wt% Cr.
【００１１】ここで、ＺｒＯ2 −ＮｉＣｒ合金のＮｉＣ
ｒ含有量が２５ｗｔ％以下では、図５（ａ）に示すよう
に、気孔率と関係のあるさびの発生率が２ｗｔ％を越え
るためであり、またＺｒＯ2 −ＮｉＣｒ合金のＮｉＣｒ
含有量が７５ｗｔ％以上となると、図５（ｂ）に示すよ
うに、煤塵の温度むらにより皮膜の付着力が５ｋｇｆ／
ｍｍ2 以下になり、また図５（ｃ）に示すように、固さ
がＨｖ６００以下となって煤塵による耐摩耗性が低下す
るからである。なお、図５（ａ）に示すさびの発生率
は、溶射皮膜を形成したテストピース（１０ｍｍ角）の
表面に５ｗｔ％ＮａＣｌ水溶液を滴下し、（０．１ｍ
ｌ）デシケータ内に２４時間入れた後、取り出して錆び
た面積を計測したものである。また図５（ｂ）に示す皮
膜の付着力は、ピンテスト法により溶射皮膜厚が５００
μｍの付着強度を計測したものである。Here, NiC of ZrO 2 -NiCr alloy is used.
This is because when the r content is 25 wt% or less, as shown in FIG. 5 (a), the occurrence rate of rust, which is related to the porosity, exceeds 2 wt% and the NiCr of the ZrO 2 —NiCr alloy is used.
When the content is 75 wt% or more, as shown in FIG. 5 (b), the adhesion of the film is 5 kgf /
5 mm 2 or less, and as shown in FIG. 5 (c), the hardness becomes Hv 600 or less and the wear resistance due to soot dust decreases. The rust generation rate shown in FIG. 5 (a) was measured by dropping a 5 wt% NaCl aqueous solution onto the surface of a test piece (10 mm square) on which a sprayed coating was formed (0.1 m
l) After being placed in a desiccator for 24 hours, it was taken out and the rusted area was measured. Further, the adhesion of the coating shown in FIG. 5 (b) shows that the spray coating thickness is 500 by the pin test method.
This is a measurement of the adhesion strength of μm.
【００１２】また緩衝皮膜層７Ｂは、管体６上に、Ｎｉ
が１０〜６０ｗｔ％含有されるＮｉＣｒ合金、たとえば
５０ｗｔ％Ｎｉ−５０ｗｔ％Ｃｒ合金を爆発溶射（高速
火炎溶射の一例）により厚さ０．３ｍｍ程度に溶射形成
されたものである。The buffer film layer 7B is formed on the tubular body 6 by Ni.
Of 10 to 60 wt% of NiCr alloy, for example 50 wt% Ni-50 wt% Cr alloy, is formed by explosive spraying (an example of high speed flame spraying) to a thickness of about 0.3 mm.
【００１３】これらＺｒＯ2 −ＮｉＣｒ外周皮膜層７Ａ
とＮｉＣｒ緩衝皮膜層７Ｂは、共に耐高温性、耐食性、
耐摩耗性に優れているので、高温の燃焼ガス１が接触し
ても管体６の腐食減肉量を大幅に減少させることができ
る。These ZrO 2 -NiCr outer peripheral coating layers 7A
And the NiCr buffer film layer 7B are both high temperature resistance, corrosion resistance,
Since it has excellent wear resistance, the amount of corrosion wall thinning of the pipe body 6 can be significantly reduced even if the high temperature combustion gas 1 comes into contact with it.
【００１４】ところで、ＺｒＯ2 −ＮｉＣｒ合金とＮｉ
Ｃｒ合金とは熱膨張率にほとんど差がないが、ＺｒＯ2
は幾分熱伝導率が低いという問題がある。これに起因し
てＺｒＯ2 を含む外周皮膜層７Ａに加熱時や冷却時に温
度むらが生じやすい。このため管体４に直接外周皮膜層
７Ａを形成すると、温度むらによる熱膨張差により、外
周皮膜層７Ａにひび割れが生じるおそれがある。管体４
にＮｉＣｒ緩衝皮膜層７Ｂを介してＺｒＯ2 −ＮｉＣｒ
外周皮膜層７Ａを設けた理由は、この時の熱応力を緩衝
皮膜層７Ｂにより吸収することにより、ひび割れを未然
に防止するためである。By the way, ZrO 2 -NiCr alloy and Ni
There is almost no difference in the coefficient of thermal expansion from the Cr alloy, but ZrO 2
Has a problem that its thermal conductivity is rather low. Due to this, temperature irregularity easily occurs in the outer coating layer 7A containing ZrO 2 during heating or cooling. Therefore, if the outer peripheral coating layer 7A is formed directly on the tubular body 4, the outer peripheral coating layer 7A may be cracked due to the difference in thermal expansion due to temperature unevenness. Tube 4
ZrO 2 -NiCr through NiCr buffer film layer 7B
The reason why the outer peripheral coating layer 7A is provided is that the thermal stress at this time is absorbed by the buffer coating layer 7B to prevent cracking.
【００１５】つぎに本発明品と従来品とを比較した試験
結果を説明する。まず表１に示すように、本発明の１種
類のテストピース（本発明品）と、従来例の２種類のテ
ストピース（従来品１、従来品２）を作成した。Next, the test results comparing the product of the present invention with the conventional product will be described. First, as shown in Table 1, one type of test piece of the present invention (invention product) and two types of conventional test pieces (conventional product 1 and conventional product 2) were prepared.
【００１６】[0016]
【表１】 [Table 1]
【００１７】また試験方法は次の通りである。まず実際
の使用状態に近付けるために、上記各テストピースの表
面に、実際に稼働しているごみ焼却炉から採取した表２
に示す成分の飛灰５０％に対しアセトン５０％（ともに
ｗｔ％）で攪拌して塗料状にしたものを５mg／m2の量だ
け塗布し、自然乾燥後に所定温度に加熱した炉内に装入
した。The test method is as follows. First, in order to bring the test pieces closer to the actual usage conditions, the surface of each of the above test pieces was collected from the actually operating refuse incinerator.
50% of fly ash of the component shown in Fig. 5 is stirred with 50% of acetone (both wt%) to form a paint, which is applied in an amount of 5 mg / m 2 , and after natural drying, it is placed in a furnace heated to a predetermined temperature. I entered.
【００１８】[0018]
【表２】 [Table 2]
【００１９】そして、実際に稼働しているごみ焼却炉の
燃焼ガスに準じた表３に示す成分の模擬燃焼ガスを６０
０cc／min 、７２hrにわたって通すことにより、各テス
トピースの腐食速度（減肉量）を測定した。なお模擬燃
焼ガスの温度は５５０℃に設定した。Then, a simulated combustion gas having the components shown in Table 3 which is the same as the combustion gas of the refuse incinerator that is actually operating is used.
The corrosion rate (thickness reduction amount) of each test piece was measured by passing the test piece over 0 cc / min for 72 hours. The temperature of the simulated combustion gas was set to 550 ° C.
【００２０】[0020]
【表３】 [Table 3]
【００２１】上記試験結果は、図３に示すように、本発
明品の腐食速度が、自溶合金を溶射した従来例１に比べ
て約１／４程度、ＮｉＣｒ合金を溶射した従来例２に比
べて約１／７となり、きわめて高い高温耐蝕性が実証さ
れた。As shown in FIG. 3, the above test results show that the corrosion rate of the product of the present invention is about 1/4 of that of the conventional example 1 in which the self-fluxing alloy is sprayed, and that in the conventional example 2 in which the NiCr alloy is sprayed. Compared to about 1/7, extremely high temperature corrosion resistance was proved.
【００２２】また図４は、図２に示すごみ焼却炉の熱交
換器３付近で、排ガス温度が４００℃および５００℃の
環境下で、本発明品と従来品２による実炉長期試験を行
った結果を示す。この時の飛灰の成分は表４の通りであ
る。Further, FIG. 4 shows a long-term test of an actual furnace using the product of the present invention and the conventional product 2 in the vicinity of the heat exchanger 3 of the refuse incinerator shown in FIG. 2 under the environment of exhaust gas temperatures of 400 ° C. and 500 ° C. The results are shown below. The components of the fly ash at this time are as shown in Table 4.
【００２３】[0023]
【表４】 [Table 4]
【００２４】上記試験結果によれば、本発明品の腐食減
肉量は、従来品２のＮｉＣｒ合金の溶射皮膜を施したも
のに比べて、約１／３と少なく、長期の使用にも充分に
耐えられることが確認された。According to the above test results, the corrosion-thinning amount of the product of the present invention is about one-third that of the conventional product 2 having the sprayed coating of NiCr alloy, which is sufficient for long-term use. It was confirmed that it can withstand.
【００２５】上記実施例によれば、ＺｒＯ2 −ＮｉＣｒ
外周皮膜層７ＡとＮｉＣｒ緩衝皮膜層７Ｂが、共に耐高
温性、耐食性、耐摩耗性に優れているので、高温腐食減
肉量を大幅に減少させることができる。また熱伝導率を
大幅に低下せさることもなく、再溶融処理も不要であ
る。さらに管体６とＺｒＯ2 −ＮｉＣｒ外周皮膜層７Ａ
との間にＮｉＣｒ緩衝皮膜層７Ｂを介在させたので、Ｚ
ｒＯ2 に起因する温度むらによる熱応力を吸収して、加
熱時や冷却時のひび割れを防止することができる。さら
にまた、仮に何らかの原因でＺｒＯ2 −ＮｉＣｒ外周皮
膜層７Ａにひび割れが生じたり腐食が生じたりした場合
でも、内側に耐食性を有するＮｉＣｒ緩衝皮膜層７Ｂ皮
膜が溶射されているので、これによって管体６の腐食を
確実に防止することができる。According to the above embodiment, ZrO 2 --NiCr
Since the outer peripheral coating layer 7A and the NiCr buffer coating layer 7B are both excellent in high temperature resistance, corrosion resistance, and wear resistance, the amount of high temperature corrosion thinning can be greatly reduced. Further, the thermal conductivity is not significantly lowered, and the remelting process is unnecessary. Further, the tubular body 6 and the ZrO 2 -NiCr outer peripheral coating layer 7A
Since the NiCr buffer film layer 7B is interposed between
It is possible to absorb thermal stress due to temperature unevenness due to rO 2 and prevent cracking during heating or cooling. Furthermore, even if the ZrO 2 —NiCr outer peripheral coating layer 7A is cracked or corroded for some reason, the NiCr buffer coating layer 7B coating having corrosion resistance is sprayed on the inner side. Corrosion of 6 can be reliably prevented.
【００２６】なお上記実施例では、ごみ焼却炉の伝熱管
や過熱管に適用した例を示したが、特に腐食性高温ガス
が接触される耐熱素材等に有効で、ガスタービンのブレ
ードなどにも幅広く適用することができる。In the above-mentioned embodiment, an example of application to a heat transfer pipe or a superheat pipe of a refuse incinerator is shown, but it is particularly effective for a heat-resistant material which is in contact with corrosive high temperature gas, and also for a blade of a gas turbine. It can be widely applied.
【００２７】[0027]
【発明の効果】以上に述べたごとく本発明の耐熱部材の
溶射皮膜によれば、Ｆｅ系耐熱素材上に溶射されて溶射
皮膜を形成するＺｒＯ2 −ＮｉＣｒ合金からなる外周皮
膜層と、ＮｉＣｒ合金からなる緩衝皮膜層は、共に耐高
温性、耐食性、耐摩耗性に優れ、高温強度も高いので、
高温腐食による減肉量を大幅に減少させることができ、
熱伝導率の大幅な低下もなく、再溶融も不要となる。ま
たＦｅ系管体と外周皮膜層との間に緩衝皮膜層を介在さ
せたので、熱伝導率が幾分低いＺｒＯ2 に起因して外周
皮膜層に温度むらが生じることがあっても、温度むらに
より生じる熱応力を緩衝皮膜層で吸収させることができ
るので、ひび割れを防止することができる。さらに、仮
に何らかの原因でＺｒＯ2 −ＮｉＣｒ外周皮膜層にひび
割れが生じたり腐食が生じたりした場合でも、内側に耐
食性を有するＮｉＣｒ緩衝皮膜層が溶射されているの
で、これによってＦｅ系耐熱素材の腐食を確実に防止す
ることができる。As described above, according to the thermal spray coating of the heat resistant member of the present invention, the outer peripheral coating layer made of ZrO 2 -NiCr alloy which is sprayed on the Fe-based heat resistant material to form the thermal spray coating, and the NiCr alloy. Since the buffer film layer consisting of is excellent in high temperature resistance, corrosion resistance, wear resistance, and high in high temperature strength,
The amount of thinning due to high temperature corrosion can be greatly reduced,
There is no significant decrease in thermal conductivity, and remelting is not necessary. Further, since the buffer coating layer is interposed between the Fe-based tubular body and the outer peripheral coating layer, even if the outer peripheral coating layer has temperature unevenness due to ZrO 2 having a somewhat low thermal conductivity, Since thermal stress caused by unevenness can be absorbed by the buffer film layer, cracking can be prevented. Furthermore, even if the ZrO 2 —NiCr outer peripheral coating layer is cracked or corroded for some reason, the NiCr buffer coating layer having corrosion resistance is sprayed on the inner side. Can be reliably prevented.
【図１】本発明に係る伝熱管の溶射皮膜の一実施例を示
し、（ａ），（ｂ）はそれぞれ溶射皮膜を示す断面図で
ある。FIG. 1 shows an example of a thermal spray coating of a heat transfer tube according to the present invention, and (a) and (b) are cross-sectional views showing the thermal spray coating, respectively.
【図２】同溶射皮膜を形成した管体を使用したごみ焼却
炉の構成図である。FIG. 2 is a configuration diagram of a refuse incinerator using a tube body having the same sprayed coating.
【図３】同溶射皮膜の比較試験結果を示すグラフであ
る。FIG. 3 is a graph showing the results of a comparative test of the same thermal spray coating.
【図４】同溶射皮膜の実炉長期試験結果を示すグラフで
ある。FIG. 4 is a graph showing the results of an actual furnace long-term test of the same sprayed coating.
【図５】同溶射皮膜のＺｒＯ2 −ＮｉＣｒ合金のＮｉＣ
ｒの含有率における性能試験結果を示し、（ａ）はさび
発生率を示すグラフ、（ｂ）は皮膜の付着力を示すグラ
フ、（ｃ）はマイクロビッカース硬さを示すグラフであ
る。FIG. 5: NiC of ZrO 2 —NiCr alloy of the same sprayed coating
The performance test result in the content rate of r is shown, (a) is a graph which shows a rust generation rate, (b) is a graph which shows the adhesive force of a film, (c) is a graph which shows micro Vickers hardness.
１ 冷却壁 ２ 水管壁用伝熱管 ３ 熱交換器 ４ 熱回収用伝熱管 ５ 過熱用蒸気管 ６ 管体 ７ 耐熱溶射皮膜 ７Ａ 外周皮膜層 ７Ｂ 緩衝皮膜層 1 Cooling Wall 2 Heat Transfer Tube for Water Tube Wall 3 Heat Exchanger 4 Heat Recovery Heat Transfer Tube 5 Superheated Steam Tube 6 Tubular Body 7 Heat Resistant Thermal Spray Coating 7A Peripheral Coating Layer 7B Buffer Coating Layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大澤 守彦 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 (72)発明者 遠山 一廣 大阪府大阪市此花区西九条５丁目３番28号 日立造船株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Morihiko Osawa 5-3-28 Nishikujo, Konohana-ku, Osaka City, Osaka Prefecture Hitachi Shipbuilding Co., Ltd. 3-28, Hitachi Shipbuilding Co., Ltd.
Claims (1)
た耐熱溶射皮膜を、 外周に形成されたＺｒＯ2 −（２５ｗｔ％〜７５ｗｔ
％）ＮｉＣｒ合金よりなる外周皮膜層と、 この外周皮膜層とＦｅ系耐熱素材との間に介在されてＮ
ｉＣｒ合金からなる緩衝皮膜層とで構成したことを特徴
とする耐熱部材の溶射皮膜。1. A ZrO 2- (25 wt% to 75 wt% formed on the outer periphery of a heat-resistant sprayed coating formed by high-speed flame spraying on the surface of a Fe-based heat-resistant material.
%) An outer peripheral coating layer made of a NiCr alloy, and N interposed between the outer peripheral coating layer and the Fe-based heat-resistant material.
A thermal spray coating for a heat-resistant member, characterized in that the thermal spray coating comprises a buffer coating layer made of an iCr alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12032295A JPH08313192A (en) | 1995-05-19 | 1995-05-19 | Spray coating film for heat resistant member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12032295A JPH08313192A (en) | 1995-05-19 | 1995-05-19 | Spray coating film for heat resistant member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08313192A true JPH08313192A (en) | 1996-11-29 |
Family
ID=14783391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12032295A Pending JPH08313192A (en) | 1995-05-19 | 1995-05-19 | Spray coating film for heat resistant member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08313192A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003286858A (en) * | 2002-03-29 | 2003-10-10 | Hitachi Ltd | Gas turbine equipment for burning reformed fuel and method of oil-heating the equipment |
| JP2003286865A (en) * | 2002-03-29 | 2003-10-10 | Hitachi Ltd | Reformed fuel combustion gas turbine device and oil- heating method therefor |
| JP2011226738A (en) * | 2010-04-22 | 2011-11-10 | Toshiba Corp | Heat transfer medium and method for manufacturing the same |
-
1995
- 1995-05-19 JP JP12032295A patent/JPH08313192A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003286858A (en) * | 2002-03-29 | 2003-10-10 | Hitachi Ltd | Gas turbine equipment for burning reformed fuel and method of oil-heating the equipment |
| JP2003286865A (en) * | 2002-03-29 | 2003-10-10 | Hitachi Ltd | Reformed fuel combustion gas turbine device and oil- heating method therefor |
| JP2011226738A (en) * | 2010-04-22 | 2011-11-10 | Toshiba Corp | Heat transfer medium and method for manufacturing the same |
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