JPH0762517A - Plasma spraying film forming method and powder feeder therefor - Google Patents
Plasma spraying film forming method and powder feeder thereforInfo
- Publication number
- JPH0762517A JPH0762517A JP5235940A JP23594093A JPH0762517A JP H0762517 A JPH0762517 A JP H0762517A JP 5235940 A JP5235940 A JP 5235940A JP 23594093 A JP23594093 A JP 23594093A JP H0762517 A JPH0762517 A JP H0762517A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- raw material
- powders
- plasma spraying
- powder supply
- 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.)
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- Coating By Spraying Or Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は各種基材表面に複数の原
料粉末を使用し、プラズマ溶射法により複合被膜を形成
させる方法及びそれに使用する混合粉末供給装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a composite coating film by plasma spraying a plurality of raw material powders on the surface of various base materials, and a mixed powder supply device used therefor.
【０００２】[0002]
【従来の技術】航空宇宙機器エンジンや燃焼室などの、
高い耐熱性、耐摩耗性あるいは耐蝕性を要求される基材
への保護膜形成方法として、金属粉末及びセラミックス
粉末などの混合粉末を使用し、プラズマ溶射法により強
固な複合被膜を形成させる方法がある。従来、金属粉末
及びセラミックス粉末を混合して使用するプラズマ溶射
法は図４に示すような方式で行われていた。図４の
（ａ）はプラズマ溶射トーチを正面から見た断面の模式
図であり、図４（ｂ）はプラズマ溶射トーチのたて断面
図を含む溶射パターンを示す説明図である。二種類の原
料粉末（例えば金属粉末とセラミックス粉末）はそれぞ
れ別の直管よりなる原料粉末供給口１４から溶射トーチ
先端部９に供給される。これらの原料粉末供給口１４か
ら同時に送り出された粉末はプラズマジェット炎中で混
合、加速され、基材１０上のプラズマトーチの中心軸１
３から若干ずれた位置に積層され、溶射皮膜１１を形成
する。このような方法においては原料粉末を均一に分散
させるのが難しく、金属層とセラミックス層とが分離し
た形になりやすいため、界面強度の高い複合皮膜を得る
のは難しい。2. Description of the Related Art Aerospace equipment such as engines and combustion chambers
As a method for forming a protective film on a substrate that requires high heat resistance, wear resistance or corrosion resistance, a method of using a mixed powder of metal powder and ceramic powder and forming a strong composite coating by plasma spraying is is there. Conventionally, a plasma spraying method in which a metal powder and a ceramics powder are mixed and used has been performed as shown in FIG. 4A is a schematic view of a cross section of the plasma spray torch viewed from the front, and FIG. 4B is an explanatory diagram showing a spray pattern including a vertical cross section of the plasma spray torch. Two kinds of raw material powders (for example, metal powder and ceramics powder) are supplied to the tip portion 9 of the thermal spray torch from the raw material powder supply ports 14 which are different straight pipes. The powders simultaneously sent out from these raw material powder supply ports 14 are mixed and accelerated in a plasma jet flame, and the central axis 1 of the plasma torch on the substrate 10 is
The thermal sprayed coating 11 is formed by laminating at a position slightly deviated from 3. In such a method, it is difficult to uniformly disperse the raw material powder, and the metal layer and the ceramic layer are likely to be separated, so that it is difficult to obtain a composite film having high interfacial strength.
【０００３】[0003]
【発明が解決しようとする課題】前記のように種類の異
なる複数の原料粉末を使用して均一な複合皮膜を得るた
めには、プラズマジェット炎中に投入する原料粉末の混
合をよくすることが必要である。ところが前記の従来技
術においては、原料粉末の混合をよくするためには、原
料粉末の供給量、粉末を移送するための不活性ガスの流
量、原料粉末の粒子の大きさなどの設定が難しく、原料
粉末の歩留りが悪くなったり、コストが上昇するなど製
造上問題が多かった。本発明の目的は、このような従来
技術の問題点を解決し、複数の原料粉末を容易に均一分
散させることができ、強度の高い複合皮膜を再現性よく
得るための手段を提供することにある。As described above, in order to obtain a uniform composite film by using a plurality of different raw material powders, it is necessary to improve the mixing of the raw material powders introduced into the plasma jet flame. is necessary. However, in the above-mentioned conventional technique, in order to improve the mixing of the raw material powder, it is difficult to set the supply amount of the raw material powder, the flow rate of the inert gas for transferring the powder, the particle size of the raw material powder, and the like. There were many manufacturing problems such as a poor yield of raw material powder and an increase in cost. An object of the present invention is to provide a means for solving the above-mentioned problems of the prior art, capable of easily uniformly dispersing a plurality of raw material powders, and obtaining a composite film having high strength with good reproducibility. is there.
【０００４】[0004]
【課題を解決するための手段】前記本発明の目的は、簡
単な構造で優れた混合効果の得られる粉末供給装置を使
用することによって達成された。すなわち本発明は
（１）２種以上の原料粉末を使用しプラズマ溶射法によ
り被膜を形成する方法において、原料粉末の供給手段と
してそれぞれの原料粉末を不活性ガスと共に送入する複
数の粉末供給管と、該粉末供給管が接続し供給される粉
末が合流する合流部と、該合流部に接続する内部に乱流
発生手段を備え合流した原料粉末を混合して射出する粉
末射出管よりなる混合粉末供給装置を用いることを特徴
とするプラズマ溶射法による被膜形成方法、（２）原料
粉末を送入するための不活性ガスの流量を、それぞれの
原料粉末を単独で溶射した場合の被膜形成位置のプラズ
マトーチ中心線からのずれが最小となる範囲に設定する
ことを特徴とする前記（１）に記載のプラズマ溶射法に
よる被膜形成方法、（３）原料粉末を不活性ガスと共に
送入する複数の粉末供給管と、該粉末供給管が接続し供
給される粉末が合流する合流部と、該合流部に接続する
内部に乱流発生手段を備え合流した原料粉末を混合して
射出する粉末射出管よりなることを特徴とする混合粉末
供給装置、である。The above objects of the present invention have been achieved by using a powder feeding apparatus which has a simple structure and provides an excellent mixing effect. That is, the present invention relates to (1) a method of forming a coating by a plasma spraying method using two or more kinds of raw material powders, and a plurality of powder supply pipes for feeding the respective raw material powders together with an inert gas as a means for supplying the raw material powders. And a powder injection tube for mixing and injecting the combined raw material powder having a turbulent flow generating means inside the connecting portion to which the powder supply pipe is connected and the powders to be supplied merge. A method for forming a coating film by a plasma spraying method, which is characterized by using a powder supply device, and (2) the flow rate of an inert gas for feeding the raw material powders, the coating film forming position when each raw material powder is sprayed alone. Of the plasma torch center line is set to a range where the deviation from the plasma torch center line is minimum, (3) the method for forming a coating film by the plasma spraying method, (3) the raw material powder together with an inert gas A plurality of powder supply pipes to be introduced, a merging part where the powder supply pipes are connected and the powders to be supplied merge with each other, and a turbulent flow generating means is provided inside the merging part to mix and mix the raw material powders. A mixed powder supply device, comprising:
【０００５】本発明のプラズマ溶射法による被膜形成方
法においては、従来技術のように複数の異なる原料粉末
をそれぞれ単独でプラズマトーチ内に供給するのではな
く、混合粉末供給装置を用いて均一に混合したのちプラ
ズマジェット炎中に投入するようにしている。In the coating film forming method by the plasma spraying method of the present invention, a plurality of different raw material powders are not individually fed into the plasma torch as in the prior art, but are uniformly mixed by using a mixed powder feeding device. After that, it is put into a plasma jet flame.
【０００６】ここで使用する混合粉末供給装置の１実施
態様を図１に示す。図１の例は２種類の原料粉末を使用
するための装置であり、図１（ａ）は粉末供給管１及び
粉末射出管３の中心軸に平行な面で切断した概略断面図
であり、図１（ｂ）は図１（ａ）の粉末射出管のＡ−Ａ
断面の概略図である。この混合粉末供給装置において
は、２個の粉末供給管１、１から不活性ガスと共に供給
される原料粉末を一旦合流部２に集めて混合し、内部に
乱流発生手段を備えた粉末射出管３を通すことによりさ
らに均一に混合させて、粉末射出管３の先端部を形成す
るノズル８からプラズマジェット炎中に投入する。One embodiment of the mixed powder feeding apparatus used here is shown in FIG. The example of FIG. 1 is an apparatus for using two kinds of raw material powders, and FIG. 1 (a) is a schematic cross-sectional view taken along a plane parallel to the central axes of the powder supply pipe 1 and the powder injection pipe 3, 1 (b) is AA of the powder injection tube of FIG. 1 (a).
It is a schematic diagram of a section. In this mixed powder supply device, the raw material powders supplied together with the inert gas from the two powder supply pipes 1 and 1 are once collected in the confluence part 2 and mixed, and a powder injection pipe provided internally with a turbulent flow generating means. The powder is further uniformly mixed by passing it through the nozzle 3, and is injected into the plasma jet flame from the nozzle 8 forming the tip of the powder injection tube 3.
【０００７】図１の装置においては乱流発生手段として
粉末射出管３の壁面に螺旋状の角又は台形ねじ溝からな
る溝４と乱流棒５が設けられている。不活性ガスにより
搬送されてくる原料粉末の流れは螺旋状の溝４により渦
巻き流を形成し、粉末射出管３の壁面に複数個、好まし
くは３個以上段差をつけて設置されたピン型、棒状、板
状、山型などの乱流棒５に衝突し乱流状態となる。乱流
棒５は固定式でもよいが図１の例のように粉末射出管３
の内壁に沿って精密ボール７を介して回転自在に取り付
けられた内筒６に付設し、粉末の衝突により回転するよ
うな構造とするのが効果的である。このように乱流状態
とすることにより混合粉末はさらに一層攪拌されること
になり、より均一に混合される。In the apparatus shown in FIG. 1, a turbulent flow rod 5 and a groove 4 formed of a spiral corner or a trapezoidal screw groove are provided on the wall surface of the powder injection tube 3 as a turbulent flow generating means. The flow of the raw material powder carried by the inert gas forms a spiral flow by the spiral groove 4, and a plurality of, preferably three or more, pin-shaped steps are installed on the wall surface of the powder injection tube 3, The turbulent flow rod 5 having a rod shape, a plate shape, a mountain shape, or the like collides with each other to be in a turbulent state. The turbulence rod 5 may be a fixed type, but as in the example of FIG.
It is effective to attach it to the inner cylinder 6 which is rotatably attached via the precision balls 7 along the inner wall of the above, and to make it rotate by the collision of the powder. By thus forming the turbulent flow state, the mixed powder is further agitated, and is more uniformly mixed.
【０００８】このようにして均一に混合された原料粉末
は、プラズマトーチの先端に取り付けられた粉末射出管
３のノズル８の先端部からプラズマジェット炎中に投入
され、加速されて基材上に溶射され複合皮膜を形成す
る。The raw material powder thus uniformly mixed is thrown into the plasma jet flame from the tip of the nozzle 8 of the powder injection tube 3 attached to the tip of the plasma torch and accelerated to be deposited on the substrate. Sprayed to form a composite film.
【０００９】ところで、プラズマ溶射法により基材上に
皮膜を形成させる場合、図２に示すように、粉末射出管
３からプラズマトーチの先端部９に供給されプラズマジ
ェット炎により溶射された原料粉末は、基材１０上のプ
ラズマトーチの中心軸１３から若干ずれた位置に積層さ
れ、皮膜１１を形成する。このずれの大きさは原料粉末
の種類及びこれを搬送する不活性ガスの流量によって変
化する。そのため複数の原料粉末を混合して使用する場
合、均一に混合して溶射しても、各原料粉末がそれぞれ
その時の不活性ガスの流量に見合った位置に積層しやす
く、均質な皮膜が形成されない場合がある。そのため、
使用する各原料粉末について、搬送するガス流量と皮膜
が形成される位置との関係を調べておき、各原料粉末に
ついての皮膜形成位置がほぼ一致する流量で原料粉末を
供給するようにすれば、より均質な皮膜を形成させるこ
とができる。By the way, when a film is formed on a base material by the plasma spraying method, as shown in FIG. 2, the raw material powder supplied from the powder injection tube 3 to the tip portion 9 of the plasma torch and sprayed by the plasma jet flame is The film 11 is formed on the base material 10 at a position slightly deviated from the central axis 13 of the plasma torch. The magnitude of this deviation changes depending on the type of raw material powder and the flow rate of the inert gas that conveys it. Therefore, when a plurality of raw material powders are mixed and used, even if the raw material powders are uniformly mixed and sprayed, it is easy for the respective raw material powders to be laminated at positions corresponding to the flow rate of the inert gas at that time, and a uniform film is not formed. There are cases. for that reason,
For each raw material powder to be used, check the relationship between the flow rate of the gas to be conveyed and the position where the film is formed, and if the raw material powder is supplied at a flow rate at which the film forming position for each raw material powder is approximately the same, A more uniform film can be formed.
【００１０】[0010]
【実施例】以下実施例により本発明をさらに具体的に説
明する。 （試験例１）プラズマ溶射装置（ＭＥＴＣＯ ９ＭＢタ
イプ）のトーチ先端に図１に示す構造の混合粉末供給装
置の試験装置（粉末射出管の直径５．０ｍｍ）を設置し
て皮膜形成試験を行った。原料粉末としてＮｉ基合金粉
末（Ｎｉ基−２５％Ｃｏ−２０％Ｃｒ−８％Ａｌ−４％
Ｔａ−０．６％Ｙ）及びジルコニア／イットリア系セラ
ミックス粉末（９２％ＺｒＯ2 ／８％Ｙ2 Ｏ3 ）を使用
し、アルミニウム合金からなる基材上に皮膜を形成させ
た。溶射条件は電流７００Ａ、電圧６５Ｖ、溶射距離６
５ｍｍ、一次ガス（Ａｒガス）１００ｐｓｉ、８０ＳＣ
ＦＨ、二次ガス（Ｈ2 ガス）５０ｐｓｉ、１２．３ＳＣ
ＦＨで行った。The present invention will be described in more detail with reference to the following examples. (Test Example 1) A film forming test was conducted by installing a test device (powder injection pipe diameter: 5.0 mm) of a mixed powder supply device having the structure shown in FIG. 1 at the torch tip of a plasma spraying device (METCO 9MB type). . Ni-based alloy powder (Ni-based-25% Co-20% Cr-8% Al-4% as raw material powder)
Ta-0.6% Y) and zirconia / yttria ceramic powder (92% ZrO 2 /8% Y 2 O 3 ) were used to form a film on a substrate made of an aluminum alloy. Spraying conditions are current 700A, voltage 65V, spraying distance 6
5 mm, primary gas (Ar gas) 100 psi, 80 SC
FH, secondary gas (H 2 gas) 50 psi, 12.3 SC
It was done at FH.
【００１１】先ず、各々の原料を単独で供給し、供給す
る不活性ガス流量と形成皮膜中心のプラズマトーチ中心
軸からのずれの大きさとの関係を調べた。粉末供給量は
金属粉末は４８〜５０ｇ／ｍｉｎ、セラミックス粉末は
５２〜５５ｇ／ｍｉｎとした。結果は図３（ａ）に示す
とおりで、供給原料あるいは供給ガス量により皮膜の形
成される位置は異なり、供給ガス流量が３．８リットル
／ｍｉｎのところで両者がほぼ一致し、中心線から下方
に３．２ｍｍずれた位置に皮膜が形成された。First, each raw material was supplied alone, and the relationship between the flow rate of the inert gas supplied and the size of the deviation of the center of the formed film from the central axis of the plasma torch was investigated. The powder supply amount was 48 to 50 g / min for the metal powder and 52 to 55 g / min for the ceramic powder. The results are as shown in FIG. 3 (a). The position where the film is formed differs depending on the feed material or the feed gas amount, and the two are almost the same at the feed gas flow rate of 3.8 liter / min, and are located downward from the center line. A film was formed at a position displaced by 3.2 mm.
【００１２】（試験例２）次に図４に示す装置で一方の
減量粉末供給口１４から５９ｇ／ｍｉｎの前記Ｎｉ基合
金粉末を供給して試験例１と同じ溶射条件で皮膜を形成
させ、供給ガス流量に対する形成皮膜中心のずれ及び形
成される皮膜の幅を調べた。供給した粉末は粒子径が４
５〜１０３μｍと３８μｍ以下の２種類を使用した。結
果を図３（ｂ）に示す。図３（ｂ）において破線に挟ま
れる部分は粒子径４５〜１０３μｍの粒子による皮膜の
幅の範囲を示し、実線に挟まれる部分は粒子径３８μｍ
以下の粒子による皮膜の幅の範囲を示す。また、図３
（ｂ）のＡ線は形成皮膜の中心のずれを示す（粒子径に
よる差はほとんど認められない）。この結果から、粉末
粒子の大きさが小さくなるほど皮膜形成位置ずれの幅が
広くなる傾向にあるが、粒子の大きさの影響は比較的小
さいことがわかる。(Test Example 2) Next, 59 g / min of the Ni-based alloy powder was supplied from one of the weight-reducing powder supply ports 14 using the apparatus shown in FIG. 4 to form a film under the same thermal spraying conditions as in Test Example 1, The deviation of the center of the formed film with respect to the supply gas flow rate and the width of the formed film were examined. The powder supplied has a particle size of 4
Two types, 5 to 103 μm and 38 μm or less, were used. The results are shown in Fig. 3 (b). In FIG. 3 (b), the part sandwiched by the broken lines shows the range of the width of the film formed by particles having a particle size of 45 to 103 μm, and the part sandwiched by the solid lines has a particle size of 38 μm.
The range of the width of the film formed by the following particles is shown. Also, FIG.
The line A in (b) shows the deviation of the center of the formed film (the difference due to the particle size is hardly recognized). From these results, it can be seen that the smaller the size of the powder particles, the wider the width of the film forming position shift, but the effect of the size of the particles is relatively small.
【００１３】（実施例）試験例１に用いたのと同じ試験
装置を用いて、前記のセラミックス粉末及び金属粉末を
それぞれ体積比で８：２、６：４、２：８となるような
割合で同時に供給し、全体のガス流量を３．８リットル
／ｍｉｎとして試験例１と同じ溶射条件で複合皮膜を形
成させた。得られた複合皮膜の界面強度は４５〜５０Ｍ
Ｐａで優れた密着力を示した。また図５はこれらの複合
皮膜の断面の金属及びセラミック材料の組織を顕微鏡写
真（倍率２００倍）で表した図であり、図５の（ａ）、
（ｂ）及び（ｃ）はそれぞれ原料粉末の体積比８：２、
６：４、２：８で形成させた被膜である。図５から、本
発明の方法により得られた複合皮膜中では、セラミック
ス及び金属成分が均一に分散しており、均質な皮膜が得
られていることがわかる。(Example) Using the same test apparatus as used in Test Example 1, the ceramic powder and the metal powder were mixed in a volume ratio of 8: 2, 6: 4, and 2: 8, respectively. Was simultaneously supplied, and a composite coating was formed under the same thermal spraying conditions as in Test Example 1 at a total gas flow rate of 3.8 liter / min. The interfacial strength of the obtained composite coating is 45-50M
Excellent adhesion was exhibited at Pa. Further, FIG. 5 is a view showing a structure of a metal and a ceramic material in a cross section of these composite coatings as a micrograph (magnification: 200 times), and FIG.
(B) and (c) are volume ratios of the raw material powders 8: 2,
It is a film formed at 6: 4 and 2: 8. From FIG. 5, it can be seen that in the composite film obtained by the method of the present invention, the ceramic and metal components are uniformly dispersed, and a uniform film is obtained.
【００１４】（比較例）図４に示す従来技術に従い、実
施例で使用したものと同じセラミックス粉末及び金属粉
末を体積比で３：７の割合で使用し、それぞれを別々の
原料粉末供給口１４からプラズマトーチ先端部９に供給
して複合被膜１１を形成させた。全体のガス供給量及び
溶射条件は実施例と同一とした。得られた被膜の界面強
度は２０〜２５ＭＰａである。また図６にこの複合皮膜
の断面の金属及びセラミック材料の組織を顕微鏡写真
（倍率２００倍）で表した図を示す。図６から、この複
合被膜中ではセラミックス層と金属層とが十分融合して
おらず、分散性に劣ることがわかる。(Comparative Example) According to the prior art shown in FIG. 4, the same ceramic powder and metal powder as those used in the example were used in a volume ratio of 3: 7, and each of them was provided with a separate raw material powder supply port 14. To the tip portion 9 of the plasma torch to form the composite coating 11. The total gas supply amount and thermal spraying conditions were the same as in the example. The interface strength of the obtained coating is 20 to 25 MPa. FIG. 6 shows a micrograph (magnification: 200) of the structure of the metal and ceramic material in the cross section of the composite coating. It can be seen from FIG. 6 that the ceramic layer and the metal layer are not sufficiently fused in this composite coating, resulting in poor dispersibility.
【００１５】[0015]
【発明の効果】本発明の混合粉末供給装置によれば、複
数の異なる種類の原料粉末を均質に分散、混合させた状
態で供給することができる。この混合粉末供給装置は、
プラズマ溶射法の原料粉末供給装置として好適であり、
またＣＶＤの原料供給装置としても好適なものである。
この混合粉末供給装置を使用した本発明の方法によれ
ば、金属とセラミックスなどの複数の異なる種類の原料
粉末を使用し、プラズマ溶射法により均質で接着強度の
すぐれた複合被膜を形成させることができる。According to the mixed powder supply device of the present invention, a plurality of different kinds of raw material powders can be supplied in a state of being uniformly dispersed and mixed. This mixed powder feeder is
Suitable as a raw material powder supply device for plasma spraying method,
It is also suitable as a raw material supply device for CVD.
According to the method of the present invention using this mixed powder feeder, a plurality of different kinds of raw material powders such as metal and ceramics can be used to form a homogeneous composite film having excellent adhesive strength by plasma spraying. it can.
【図１】本発明の混合粉末供給装置の１実施態様を示す
説明図。FIG. 1 is an explanatory view showing one embodiment of a mixed powder supply device of the present invention.
【図２】プラズマトーチの先端部から溶射された原料粉
末が基材上に被膜を形成する状態を示す概略説明図。FIG. 2 is a schematic explanatory view showing a state in which the raw material powder sprayed from the tip portion of the plasma torch forms a coating film on the base material.
【図３】供給する不活性ガス流量と形成皮膜中心のプラ
ズマトーチ中心軸からのずれの大きさとの関係を示すグ
ラフ。FIG. 3 is a graph showing the relationship between the flow rate of an inert gas supplied and the amount of deviation of the center of the formed film from the central axis of the plasma torch.
【図４】従来技術による複合被膜の形成方法を示す概略
説明図。FIG. 4 is a schematic explanatory view showing a method for forming a composite coating according to a conventional technique.
【図５】本発明の方法で形成させた複合皮膜の断面の金
属及びセラミック材料の組織の顕微鏡写真。FIG. 5 is a photomicrograph of the structure of the metal and ceramic material of the cross section of the composite coating formed by the method of the present invention.
【図６】従来技術の方法で形成させた複合皮膜の断面の
金属及びセラミック材料の組織の顕微鏡写真。FIG. 6 is a photomicrograph of the structure of metal and ceramic materials of a cross section of a composite coating formed by a prior art method.
─────────────────────────────────────────────────────
─────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成６年６月１６日[Submission date] June 16, 1994
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図５[Name of item to be corrected] Figure 5
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図５】 [Figure 5]
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図６[Name of item to be corrected] Figure 6
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図６】 [Figure 6]
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤原 力 愛知県名古屋市港区大江町10番地 三菱重 工業株式会社名古屋航空宇宙システム製作 所内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Riki Fujiwara 10 Oemachi, Minato-ku, Nagoya, Aichi Mitsubishi Heavy Industries, Ltd. Nagoya Aerospace Systems Works
Claims (3)
射法により被膜を形成する方法において、原料粉末の供
給手段としてそれぞれの原料粉末を不活性ガスと共に送
入する複数の粉末供給管と、該粉末供給管が接続し供給
される粉末が合流する合流部と、該合流部に接続する内
部に乱流発生手段を備え合流した原料粉末を混合して射
出する粉末射出管よりなる混合粉末供給装置を用いるこ
とを特徴とするプラズマ溶射法による被膜形成方法。1. A method for forming a coating film by a plasma spraying method using two or more raw material powders, wherein a plurality of powder supply pipes for feeding the respective raw material powders together with an inert gas are provided as a means for supplying the raw material powders. Mixed powder supply consisting of a merging part to which the powder supply pipe is connected and where the supplied powder merges, and a powder injection pipe for mixing and injecting the combined raw material powder provided with a turbulent flow generating means inside the connecting part A method for forming a coating film by a plasma spraying method, which comprises using an apparatus.
流量を、それぞれの原料粉末を単独で溶射した場合の被
膜形成位置のプラズマトーチ中心線からのずれが最小と
なる範囲に設定することを特徴とする請求項１に記載の
プラズマ溶射法による被膜形成方法。2. The flow rate of the inert gas for feeding the raw material powders is set to a range where the deviation of the film forming position from the plasma torch center line when each raw material powder is sprayed alone is minimized. The coating film forming method according to claim 1, wherein the plasma spraying method is used.
数の粉末供給管と、該粉末供給管が接続し供給される粉
末が合流する合流部と、該合流部に接続する内部に乱流
発生手段を備え合流した原料粉末を混合して射出する粉
末射出管よりなることを特徴とする混合粉末供給装置。3. A plurality of powder supply pipes for feeding the raw material powder together with an inert gas, a confluence part where the powder supply pipes are connected and the powders supplied are combined, and a turbulent flow inside the connection part. A mixed powder supply device comprising a powder injection tube which is provided with a generating means and which mixes and merges the combined raw material powders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5235940A JPH0762517A (en) | 1993-08-30 | 1993-08-30 | Plasma spraying film forming method and powder feeder therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5235940A JPH0762517A (en) | 1993-08-30 | 1993-08-30 | Plasma spraying film forming method and powder feeder therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0762517A true JPH0762517A (en) | 1995-03-07 |
Family
ID=16993484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5235940A Withdrawn JPH0762517A (en) | 1993-08-30 | 1993-08-30 | Plasma spraying film forming method and powder feeder therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0762517A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019094565A (en) * | 2017-11-22 | 2019-06-20 | 三菱重工業株式会社 | Film deposition apparatus and film deposition method |
-
1993
- 1993-08-30 JP JP5235940A patent/JPH0762517A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2019094565A (en) * | 2017-11-22 | 2019-06-20 | 三菱重工業株式会社 | Film deposition apparatus and film deposition method |
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