JPH022944B2 - - Google Patents
Info
- Publication number
- JPH022944B2 JPH022944B2 JP56071927A JP7192781A JPH022944B2 JP H022944 B2 JPH022944 B2 JP H022944B2 JP 56071927 A JP56071927 A JP 56071927A JP 7192781 A JP7192781 A JP 7192781A JP H022944 B2 JPH022944 B2 JP H022944B2
- Authority
- JP
- Japan
- Prior art keywords
- caf
- nio
- sealing material
- powder
- present
- 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.)
- Expired - Lifetime
Links
- 239000000843 powder Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 5
- 229910001634 calcium fluoride Inorganic materials 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- 239000002344 surface layer Substances 0.000 claims description 4
- 229910004261 CaF 2 Inorganic materials 0.000 description 16
- 239000003566 sealing material Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 238000007751 thermal spraying Methods 0.000 description 3
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
Description
【発明の詳細な説明】
本発明は自動車用ガスタービン等の熱交換器に
用いられるシール材の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a sealing material used in a heat exchanger such as a gas turbine for an automobile.
現在、米国のエネルギー庁等ではトラツクない
し乗用車用ガスタービンの研究、開発が鋭意進め
られている。これ等のガスタービンでは燃費、熱
効率の点からタービン入口温度を出来るだけ高く
取ることが望ましく、この為に熱交換器にはハニ
カム状のセラミツクスコアが使用されることが必
須である。 Currently, research and development of gas turbines for trucks and passenger cars is being actively carried out by the US Energy Agency and other organizations. In these gas turbines, it is desirable to keep the turbine inlet temperature as high as possible in terms of fuel efficiency and thermal efficiency, and for this reason it is essential to use a honeycomb-shaped ceramic core in the heat exchanger.
ところが、熱交換器はその左右に低温・高圧及
び高温・低圧のガスが出入りする構造になつてい
る為に、この２つの領域を完全にシールする必要
があり、ここに使用されるシール材の性能が熱交
換器の寿命及び性能を決定すると云つても過言で
はない。 However, since the heat exchanger is structured so that low-temperature/high-pressure gas and high-temperature/low-pressure gas enter and exit from the left and right sides, it is necessary to completely seal these two areas, and the sealing material used here It is no exaggeration to say that performance determines the life and performance of a heat exchanger.
従来、シール材の製造方法としては極く大雑把
に云つて下記の２通りの方法があつた。 Conventionally, there have been two methods for manufacturing sealing materials, roughly speaking as follows.
(1) 例えば、Inco601合成母材にNi―CrやNi―
Cr―Alのような粉末をアンダー・コートとし
て溶射し、その上に摺動特性の優れたNiOと
CaF2とから成る粉末を溶射する方法。(1) For example, Ni-Cr or Ni-
Powder such as Cr-Al is sprayed as an undercoat, and NiO with excellent sliding properties is applied on top of it.
A method of thermal spraying a powder consisting of CaF2 .
(2) 例えば、NiOとCaF2とから成る粉末を一枚
物として成型・焼結する方法。(2) For example, a method in which powders made of NiO and CaF 2 are molded and sintered as a single piece.
ここに、(1)の方法においては、溶射中にCaF2
の一部が焼失して初期のNiOとCaF2との混合組
成にならなかつたり、溶射皮膜中でNiOとCaF2
とが均一に分散しない場合が多く、安定した摺動
特性が得られないことが多かつた。又、溶射その
ままでは表面の凹凸が著しく、実用に供するには
研磨する必要があり、これがコスト・アツプの一
因でももあつた。 Here, in method (1), CaF 2
A part of the NiO and CaF 2 may be burned away and the initial mixed composition of NiO and CaF 2 may not be achieved, or NiO and CaF 2 may be mixed in the sprayed coating.
In many cases, the particles were not dispersed uniformly, and stable sliding characteristics were often not obtained. In addition, if thermal sprayed as is, the surface would be extremely uneven, requiring polishing for practical use, which was also one of the causes of increased costs.
次に、(2)の方法においては、焼結で製作する関
係上、余り大きな寸法のものは製作が困難であつ
たり、焼結に非常に高温を必要とする為高価であ
ると云う欠点があつた。 Next, method (2) has the drawbacks that it is difficult to manufacture products with excessively large dimensions because they are manufactured by sintering, and they are expensive because they require extremely high temperatures for sintering. It was hot.
また、従来、以上の様な目的にかなうシール材
としては例えば80〜85wt％NiO、20〜15wt％
CaF2の組成を持つ溶射皮膜が500℃以上の高温で
相手材をセラミツクスとした時、優れた摺動特性
を保持するとされており、更に溶射する際に
CaF2でNiOの粉末をコーテイングしたものを用
いると、更に摺動特性が改善されると云われてい
る。（G.D.Moore，J.E.Riffer Jr.；J.Vac.Sci.
Technol.Vol.11，（’74），No.４）しかし、この
コーテイング粉末の製造は非常に高価であり、通
常の溶射皮膜では先に述べた様な欠点を保持して
いることから、これ等の欠点を改善しようと試み
た結果、本発明が完成した次第である。 In addition, conventional sealing materials that meet the above purposes include, for example, 80 to 85 wt% NiO, 20 to 15 wt%
It is said that a thermal spray coating with a composition of CaF 2 maintains excellent sliding properties when used as a mating material with ceramics at high temperatures of 500℃ or higher, and furthermore, when thermal spraying is performed,
It is said that the sliding properties can be further improved by using a coating of NiO powder with CaF 2 . (GDMoore, JERiffer Jr.; J.Vac.Sci.
Technol.Vol.11, ('74), No.4) However, the production of this coating powder is very expensive, and ordinary thermal spray coatings have the drawbacks mentioned above. The present invention was completed as a result of attempts to improve these drawbacks.
すなわち本発明は、セラミツクスから構成され
る溶射被覆の上にCaF2を含有する粉末を塗布し、
その後レーザ・ビームを照射して、溶融・凝固さ
せ母材表面にCaF2に富んだ表面層を形成するこ
とを特徴とする高温用摺動シール材の製造方法と
したものである。 That is, the present invention applies a powder containing CaF 2 on a thermal spray coating made of ceramics,
This is a method for manufacturing a high-temperature sliding sealing material, which is characterized in that it is then irradiated with a laser beam to melt and solidify the material to form a surface layer rich in CaF 2 on the surface of the base material.
次に、本発明を具体的に説明する。 Next, the present invention will be specifically explained.
まず、母材である３mm厚×30mm幅×200mm長の
Inco601をAl2O3の微粒子を用いて表面を凸凹に
してCaF2の粉末が付着しやすいブラステイング
した後、直ちに下記の要領で溶射皮膜を形成し
た。 First, the base material is 3mm thick x 30mm wide x 200mm long.
After blasting Inco601 using fine particles of Al 2 O 3 to make the surface uneven so that CaF 2 powder easily adheres, a thermal spray coating was immediately formed in the following manner.
溶射ガン：Plasmadyne（雰囲気：大気、アー
ク電流：800A、アーク電圧：45V）
アンダー・コート材：Ni―Cr粉末
トツプ・コート材：80NiO／20CaF2の粉末
なお、アンダー・コート層の厚みは約0.2mm、
トツプ・コート層の厚みは約１mmとした。 Thermal spray gun: Plasmadyne (atmosphere: air, arc current: 800A, arc voltage: 45V) Undercoat material: Ni-Cr powder Top coat material: 80NiO/20CaF 2 powder The thickness of the undercoat layer is approximately 0.2 mm,
The thickness of the top coat layer was approximately 1 mm.
更に、その後CaF2の粉末を上記溶射皮膜の上
に約0.1mm塗布し、3KWCO2レーザ装置を用いて
照射し溶射皮膜の上にCaF2に富んだ層を形成し
た。 Furthermore, approximately 0.1 mm of CaF 2 powder was then applied onto the above thermal sprayed coating and irradiated using a 3KWCO 2 laser device to form a CaF 2 -rich layer on the thermal sprayed coating.
さて、以上のようにして製造したシール材につ
いて、その表層部を光学顕微鏡及びＸ線マイク
ロ・アナライザーで観察したところ、表層部約
0.1mmはCaF2に富んだ均一なNiO／CaF2から構成
されていることがわかつた。更に、表面から約
0.3mm深さ迄は溶射そのままの状態に比べて遥か
に均一にNiOとCaF2とが分布していることが判
つた。この理由としては、レーザ・ビームを用い
ることに依り表面から約0.3mm深さ迄の領域が急
速に加熱・冷却される為と考えられる。 Now, when the surface layer of the sealing material manufactured as described above was observed using an optical microscope and an X-ray microanalyzer, it was found that the surface layer was approximately
It was found that 0.1 mm was composed of uniform NiO/CaF 2 rich in CaF 2 . Furthermore, approximately from the surface
It was found that NiO and CaF 2 were distributed much more uniformly up to a depth of 0.3 mm than in the as-sprayed state. The reason for this is thought to be that the area from the surface to a depth of approximately 0.3 mm is rapidly heated and cooled by using a laser beam.
なお、表面の凹凸は全面1μ以下であり、実用
に供するために改めて研磨する必要はなかつた。 Note that the surface irregularities were less than 1μ over the entire surface, and there was no need for further polishing for practical use.
また、本発明シール材と溶射後研磨して表面の
凹凸を3μ以下に仕上げた比較シール材とについ
て、下記の要領で摺動試権を実施した結果、
温度：760℃
面圧：0.5Kg／cm2
時間：120Hr
相手材：ハニカム状セラミツクス・コア
本発明シール材では、
摩擦係数：0.2
摩耗率：3.0×10-4cm／100Hr
比較シール材では
摩擦係数：0.3
摩耗率：1.0×10-3cm／100Hr
であつた。 In addition, sliding tests were performed on the sealing material of the present invention and a comparison sealing material whose surface was polished to a surface roughness of 3μ or less by thermal spraying and polishing, and the results were as follows: Temperature: 760℃ Surface pressure: 0.5Kg/ cm 2 hours: 120Hr Compatible material: Honeycomb ceramic core With the sealing material of the present invention, friction coefficient: 0.2 Wear rate: 3.0×10 -4 cm/100Hr With comparison sealing material, friction coefficient: 0.3 Wear rate: 1.0×10 -3 cm/100Hr.
以上の結果から、本発明に依り製造されたシー
ル材は摩擦係数のみならず摩耗率が著しく改善さ
れることがわかつた。 From the above results, it was found that the sealing material manufactured according to the present invention has significantly improved not only the friction coefficient but also the wear rate.
なお、本発明に依り製造されたシール材は
NiO／CaF2に限つたわけではなくNiO／CoO／
CaF2やCoO／CaF2等にも同様に適用可能であ
り、更には本発明は焼結で製作された一枚物のシ
ール材にも適用可能であることは云う迄もない。 Note that the sealing material manufactured according to the present invention is
Not limited to NiO/CaF 2 , but also NiO/CoO/
It goes without saying that the present invention can be similarly applied to CaF2 , CoO/ CaF2, etc., and furthermore, the present invention can also be applied to a single piece of sealing material produced by sintering.
Claims (1)
CaF2を含有する粉末を塗布し、その後レーザ・
ビームを照射して、溶融・凝固させ母材表面に
CaF2に富んだ表面層を形成することを特徴とす
る高温用摺動シール材の製造方法。1 On top of the thermal spray coating made of ceramics
Powder containing CaF2 is applied and then laser
Irradiate the beam to melt and solidify the material onto the surface of the base material.
A method for producing a high-temperature sliding seal material characterized by forming a surface layer rich in CaF2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56071927A JPS57188478A (en) | 1981-05-13 | 1981-05-13 | Manufacture of high temperature sliding seal material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56071927A JPS57188478A (en) | 1981-05-13 | 1981-05-13 | Manufacture of high temperature sliding seal material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57188478A JPS57188478A (en) | 1982-11-19 |
| JPH022944B2 true JPH022944B2 (en) | 1990-01-19 |
Family
ID=13474644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56071927A Granted JPS57188478A (en) | 1981-05-13 | 1981-05-13 | Manufacture of high temperature sliding seal material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57188478A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0333147U (en) * | 1989-08-09 | 1991-04-02 |
-
1981
- 1981-05-13 JP JP56071927A patent/JPS57188478A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0333147U (en) * | 1989-08-09 | 1991-04-02 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57188478A (en) | 1982-11-19 |
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