JPH08253851A - Composite powder for thermal spraying - Google Patents
Composite powder for thermal sprayingInfo
- Publication number
- JPH08253851A JPH08253851A JP8337395A JP8337395A JPH08253851A JP H08253851 A JPH08253851 A JP H08253851A JP 8337395 A JP8337395 A JP 8337395A JP 8337395 A JP8337395 A JP 8337395A JP H08253851 A JPH08253851 A JP H08253851A
- Authority
- JP
- Japan
- Prior art keywords
- powder
- layer
- composite powder
- thermal
- thermal spraying
- 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.)
- Withdrawn
Links
- 239000000843 powder Substances 0.000 title claims abstract description 86
- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 238000007751 thermal spraying Methods 0.000 title claims abstract description 30
- 239000002245 particle Substances 0.000 claims description 15
- 238000000576 coating method Methods 0.000 abstract description 13
- 239000011248 coating agent Substances 0.000 abstract description 11
- 238000007747 plating Methods 0.000 abstract description 4
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 238000005507 spraying Methods 0.000 description 26
- 229910000765 intermetallic Inorganic materials 0.000 description 21
- 229910001000 nickel titanium Inorganic materials 0.000 description 16
- 230000035939 shock Effects 0.000 description 12
- 239000011812 mixed powder Substances 0.000 description 11
- 230000005484 gravity Effects 0.000 description 9
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 229910001069 Ti alloy Inorganic materials 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000007750 plasma spraying Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 229910010038 TiAl Inorganic materials 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 239000011246 composite particle Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、急熱急冷されると同
時に衝撃摩擦を受ける装置部品の表面に溶射皮膜を形成
するための溶射用複合粉末に関し、特に吸気用エンジン
バルブのフェース面に耐熱衝撃性、耐摩耗性および密着
性に優れた溶射皮膜を形成するための溶射用複合粉末に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite powder for thermal spraying for forming a thermal spray coating on the surface of equipment parts that are subjected to impact friction at the same time as being rapidly heated and rapidly cooled, and in particular, heat-resistant on the face surface of an intake engine valve. The present invention relates to a composite powder for thermal spraying for forming a thermal spray coating excellent in impact resistance, wear resistance and adhesion.
【０００２】[0002]
【従来の技術】一般に、金属間化合物は高温強度および
高温耐食性に優れているために、過酷な雰囲気にさらさ
れる各種装置の内面または表面に溶射等の方法により金
属間化合物皮膜を形成し、各種装置の使用寿命の向上を
図っている。2. Description of the Related Art Generally, since intermetallic compounds are excellent in high temperature strength and high temperature corrosion resistance, intermetallic compound coatings are formed on inner surfaces or surfaces of various devices exposed to a harsh atmosphere by a method such as thermal spraying. We are working to improve the service life of the device.
【０００３】例えば、特開平４−２１７５６号公報では
２０〜６３重量％のＡｌ粉末を含有し、残りがＴｉ粉末
からなる混合粉末を溶射することによりＴｉＡｌ系金属
間化合物皮膜を形成する方法が提案されている。For example, Japanese Laid-Open Patent Publication No. 4-21756 proposes a method of forming a TiAl-based intermetallic compound film by spraying a mixed powder containing 20 to 63% by weight of Al powder and the rest of Ti powder. Has been done.
【０００４】したがって、ＮｉＴｉ系金属間化合物皮膜
を形成しようとする場合には、所定割合に配合し混合さ
れたＴｉ粉末およびＮｉ粉末からなる混合粉末を溶射す
ればよいことは簡単に思い付くことである。Therefore, when it is desired to form a NiTi-based intermetallic compound coating, it is easily conceivable that a mixed powder of Ti powder and Ni powder mixed and mixed in a predetermined ratio may be sprayed. .
【０００５】しかし、Ｔｉ（比重：４．５）粉末および
Ａｌ（比重：２．７）粉末からなる混合粉末のように、
比重差の比較的少ない金属粉末からなる混合粉末を溶射
ノズルに供給して溶射皮膜を形成しても混合粉末搬送中
に比重差による混合比率が変動することは少なく、得ら
れた溶射皮膜のＴｉとＡｌの濃度変化は少ないが、Ｎｉ
（比重：８．９）粉末およびＴｉ（比重：４．５）粉末
からなる混合粉末のように、比重差の大きな金属粉末か
らなる混合粉末を溶射ノズルに供給すると、ホッパーか
ら溶射ノズルに至る間に比重差によって混合比率が変化
し、均一な成分組成のＮｉＴｉ系金属間化合物皮膜は得
られない。そのために、ＮｉとＴｉのような比重差の大
きい金属からなる金属間化合物皮膜を溶射により形成す
るには、あらかじめ所定の成分組成に溶製された溶湯を
アトマイズして得られたＮｉＴｉ系金属間化合物粉末を
溶射粉末として使用し、ＮｉＴｉ系金属間化合物溶射皮
膜を形成することも考えられる。However, like a mixed powder composed of Ti (specific gravity: 4.5) powder and Al (specific gravity: 2.7) powder,
Even if a mixed powder made of metal powder having a relatively small difference in specific gravity is supplied to the thermal spray nozzle to form a thermal spray coating, the mixing ratio due to the difference in specific gravity does not fluctuate during transport of the mixed powder, and the Ti of the thermal spray coating obtained is obtained. And Al concentration changes little, but Ni
When a mixed powder composed of a metal powder having a large specific gravity difference, such as a mixed powder composed of a (specific gravity: 8.9) powder and a Ti (specific gravity: 4.5) powder, is supplied to the thermal spray nozzle, the distance from the hopper to the thermal spray nozzle is increased. In addition, the mixing ratio changes due to the difference in specific gravity, and a NiTi-based intermetallic compound film having a uniform composition cannot be obtained. Therefore, in order to form an intermetallic compound film made of a metal having a large difference in specific gravity such as Ni and Ti by thermal spraying, a NiTi-based intermetallic compound obtained by atomizing a molten metal prepared in advance with a predetermined component composition is used. It is also conceivable to use a compound powder as a thermal spray powder to form a NiTi-based intermetallic compound thermal spray coating.
【０００６】[0006]
【発明が解決しようとする課題】しかし、ＮｉＴｉ系金
属間化合物は高温耐食性に優れてかつ高硬度を有してい
るが、ＮｉＴｉ系金属間化合物粉末相互の溶着性および
基材表面に対する溶着性が劣っているところから、アト
マイズして得られたＮｉＴｉ系金属間化合物粉末を溶射
して得られた溶射皮膜は基材から剥離しやすく、特に吸
気用エンジンバルブのフェース面のように急熱急冷の熱
衝撃を受けると同時に衝突と摩擦を繰り返す部分に形成
された溶射皮膜には亀裂が生じ剥離するなどの課題があ
った。However, although the NiTi-based intermetallic compound is excellent in high temperature corrosion resistance and has a high hardness, the NiTi-based intermetallic compound powders are not weldable to each other and to the substrate surface. Since it is inferior, the sprayed coating obtained by spraying the NiTi-based intermetallic compound powder obtained by atomization is easily peeled off from the base material, and especially when it is rapidly heated and quenched like the face surface of an intake engine valve. There was a problem that the thermal spray coating formed on the portion where thermal shock was received and collision and friction were repeated at the same time was cracked and separated.
【０００７】[0007]
【課題を解決するための手段】そこで、本発明者等は、
吸気用エンジンバルブのフェース面のような急熱急冷の
熱衝撃を受けると同時に衝撃摩擦を受ける個所に溶射し
ても剥離することのない耐熱衝撃性、耐摩耗性および密
着性に優れた溶射皮膜を形成すべく研究を行った結果、
Ｔｉ粉末の表面をＮｉ層で被覆してなる複合粉末をプラ
ズマアーク溶射すると、複合粉末はプラズマアーク中を
通過する間に純Ｔｉ粉末と純Ｎｉ被膜の境界でＮｉＴｉ
金属間化合物が生成し、基材表面に形成された溶射皮膜
はＮｉ素地中にＮｉＴｉ金属間化合物層で被覆されたＴ
ｉ粒子が均一分散した組織を有し、この溶射皮膜はＮｉ
を接合金属としているために密着性に優れ、熱衝撃およ
び衝撃摩擦を受けても剥離することはないという研究結
果が得られたのである。Therefore, the present inventors have
A thermal spray coating with excellent thermal shock resistance, abrasion resistance, and adhesion that does not peel off even when it is sprayed onto a location that is subjected to impact shock friction at the same time as a thermal shock of rapid heating and quenching, such as the face surface of an intake engine valve. As a result of conducting research to form
When plasma arc spraying is performed on the composite powder formed by coating the surface of the Ti powder with the Ni layer, the composite powder is NiTi at the boundary between the pure Ti powder and the pure Ni coating while passing through the plasma arc.
The intermetallic compound is generated, and the thermal spray coating formed on the surface of the base material is T coated with the NiTi intermetallic compound layer in the Ni matrix.
The spray coating has a structure in which i particles are uniformly dispersed.
Since the joining metal is used as the joining metal, it has excellent adhesiveness, and the research result was obtained that it does not peel even when subjected to thermal shock and shock friction.
【０００８】この発明は、かかる研究結果に基づいてな
されたものであって、Ｔｉ粉末の表面をＮｉ層で被覆し
てなる溶射用複合粉末に特徴を有するものである。The present invention has been made based on the results of such research, and is characterized by a thermal spraying composite powder obtained by coating the surface of Ti powder with a Ni layer.
【０００９】この発明の溶射用複合粉末は、平均粒径：
２０〜１００μｍのＴｉ粉末と平均粒径：０．１〜１０
μｍのＮｉ粉末を混合器により均一に混合し、得られた
混合粉末を容器に装入し、撹拌棒で混合粉末を撹拌させ
ることによりＴｉ粉末の表面にＮｉ粉末を圧着させ、Ｎ
ｉ層を形成することにより製造する（以下、この方法に
よりＮｉ層を形成する方法をメカニカルプレーティング
という）。メカニカルプレーティングにより得られた複
合粉末をふるいにかけて１０〜１５０μｍの径の複合粉
末を分級して取り出し、この発明の溶射用複合粉末とす
る。この発明の溶射用複合粉末の粒径を１０〜１５０μ
ｍとしたのは、１０μｍ未満の粒径ではプラズマ中でＴ
ｉ粉末とＮｉ層が完全に溶融し、ＴｉとＮｉの複合組織
を維持できなくなるので好ましくなく、一方、１５０μ
ｍを越えると溶射用複合粉末の熱容量が大きすぎて溶射
ガン先端に生成した短いプラズマ内部を通過中にＮｉ層
が十分に溶融せず、したがって形成された溶射皮膜が基
板に密着せず、さらにＮｉＴｉ金属間化合物の生成も不
十分となるので十分な耐摩耗性が得られないので好まし
くないことによるものである。この発明の溶射用複合粉
末の一層好ましい粒径は４０〜７０μｍである。The thermal sprayed composite powder of the present invention has an average particle size:
20 to 100 μm Ti powder and average particle size: 0.1 to 10
The Ni powder of μm was uniformly mixed by a mixer, the obtained mixed powder was charged into a container, and the Ni powder was pressure-bonded to the surface of the Ti powder by stirring the mixed powder with a stir bar.
It is manufactured by forming an i layer (hereinafter, a method of forming a Ni layer by this method is referred to as mechanical plating). The composite powder obtained by mechanical plating is sieved to classify and take out the composite powder having a diameter of 10 to 150 μm to obtain the thermal spraying composite powder of the present invention. The particle size of the composite powder for thermal spraying of the present invention is 10 to 150 μm.
m is T in the plasma when the particle size is less than 10 μm.
This is not preferable because the i powder and the Ni layer are completely melted and the composite structure of Ti and Ni cannot be maintained.
When it exceeds m, the thermal capacity of the composite powder for thermal spraying is too large and the Ni layer is not sufficiently melted while passing through the short plasma generated at the tip of the thermal spray gun, so that the thermal spray coating formed does not adhere to the substrate. This is because the formation of NiTi intermetallic compound is insufficient and sufficient abrasion resistance cannot be obtained, which is not preferable. The more preferable particle diameter of the thermal spraying composite powder of the present invention is 40 to 70 μm.
【００１０】この発明のＴｉ粉末およびＮｉ層からなる
溶射用複合粉末のＮｉ層は５μｍ以上であり、かつＴｉ
粉末の粒径：Ｎｉ層の厚さ＝１０以下：１（一層好まし
くは５：１）である。Ｎｉ層の厚さが５μｍ未満でかつ
Ｔｉ粉末の粒径：Ｎｉ層の厚さ＝１０超：１であると、
溶射皮膜におけるＮｉ量が不足して基材に対する密着性
が不足するので好ましくない。The Ni layer of the thermal spraying composite powder comprising the Ti powder and the Ni layer of the present invention has a thickness of 5 μm or more, and Ti
Powder particle size: Ni layer thickness = 10 or less: 1 (more preferably 5: 1). When the thickness of the Ni layer is less than 5 μm and the particle diameter of the Ti powder: the thickness of the Ni layer = more than 10: 1,
It is not preferable because the amount of Ni in the thermal spray coating is insufficient and the adhesion to the substrate is insufficient.
【００１１】したがって、この発明の溶射用複合粉末に
おけるＮｉ層の厚さは通常のメッキなどの方法で形成さ
れるＮｉ層よりも厚く大量に被覆する必要があるところ
から、上記メカニカルプレーティング法により製造する
ことが好ましく、その他の方法では製造時間が長くなっ
て効率的でない。Accordingly, the thickness of the Ni layer in the composite powder for thermal spraying of the present invention is thicker than that of the Ni layer formed by a conventional method such as plating. Manufacturing is preferred, and other methods are not efficient due to long manufacturing times.
【００１２】この発明の溶射用複合粉末の構成および作
用を図面に基づいて説明する。The structure and action of the thermal spraying composite powder of the present invention will be described with reference to the drawings.
【００１３】図１は、この発明の溶射用複合粉末の断面
図であり、図２は、この発明の溶射用複合粉末をプラズ
マ中に供給し、基材表面に溶射皮膜を形成した状態の断
面説明図である。FIG. 1 is a cross-sectional view of the thermal spraying composite powder of the present invention, and FIG. 2 is a cross-sectional view of the thermal spraying composite powder of the present invention supplied into plasma to form a thermal spray coating on the surface of a substrate. FIG.
【００１４】図１に示される本発明溶射用複合粉末１
は、Ｔｉ粉末２の表面をＮｉ層３で被覆した構造を有し
ている。この本発明溶射用複合粉末１を図２に示される
ようにプラズマ６中に供給すると、Ｔｉ粉末２とＮｉ層
３の境界にＮｉＴｉ金属間化合物層４が形成され、この
ＮｉＴｉ金属間化合物層４が形成された溶射用複合粉末
が基材５に衝突して溶射皮膜７が形成される。Ｔｉ粉末
は大気プラズマ中に単独で存在すると酸化しやすいが、
本発明溶射用複合粉末１のようにＮｉ層３で被覆されて
いるのでプラズマ溶射中にＴｉ粉末が酸化することはな
い。The composite powder 1 for thermal spraying of the present invention shown in FIG.
Has a structure in which the surface of Ti powder 2 is covered with a Ni layer 3. When this thermal spraying composite powder 1 of the present invention is supplied into plasma 6 as shown in FIG. 2, a NiTi intermetallic compound layer 4 is formed at the boundary between the Ti powder 2 and the Ni layer 3, and this NiTi intermetallic compound layer 4 is formed. The composite powder for thermal spraying thus formed collides with the base material 5 to form the thermal spray coating 7. Ti powder easily oxidizes when present alone in atmospheric plasma,
Since it is covered with the Ni layer 3 like the composite powder 1 for thermal spraying of the present invention, the Ti powder is not oxidized during plasma spraying.
【００１５】このようにして得られた溶射皮膜７は、延
性に優れたＮｉ素地中に、Ｔｉ粒子２ａを硬さの高いＮ
ｉＴｉ金属間化合物層４ａで被覆した複合粒子が均一分
散した組織を有し、Ｎｉ素地は基板に対する密着性に優
れているところから上記溶射皮膜７は熱衝撃および衝撃
摩擦を受けても剥離することがなく、しかもＮｉＴｉ金
属間化合物層４ａを含むので耐摩耗性にも優れている。The thermal sprayed coating 7 thus obtained contains Ti particles 2a of high hardness N in a Ni base material having excellent ductility.
Since the composite particles coated with the iTi intermetallic compound layer 4a have a uniformly dispersed structure and the Ni substrate has excellent adhesion to the substrate, the thermal spray coating 7 should be peeled off even when subjected to thermal shock and shock friction. It also has excellent wear resistance because it contains no NiTi intermetallic compound layer 4a.
【００１６】[0016]
【実施例】表１に示される平均粒径を有する純Ｔｉ粉末
および純Ｎｉ粉末を用意し、これら粉末を表１に示され
る割合となるように配合し、得られた配合粉末を直径：
６mmのステンレスボールと共にミキサーに装填し、撹拌
混合したのちミキサーからステンレスボールと共に取り
出して混合粉末を作製した。EXAMPLE Pure Ti powder and pure Ni powder having the average particle size shown in Table 1 were prepared, and these powders were compounded in the proportions shown in Table 1, and the resulting compounded powder had a diameter of:
It was loaded into a mixer together with 6 mm stainless balls, stirred and mixed, and then taken out from the mixer together with the stainless balls to prepare a mixed powder.
【００１７】得られた混合粉末をさらにステンレス鋼製
密閉容器に装填し、擦り潰すように撹拌してＴｉ粉末表
面にＮｉ層を被覆し、得られた複合粉末を分級して表１
に示されるＴｉの平均粒径およびＮｉ層厚を有する本発
明溶射用複合粉末（以下、本発明複合粉末という）１〜
１０を作製した。The obtained mixed powder was further loaded into a stainless steel closed container, and the mixture was stirred so as to be crushed, and the surface of the Ti powder was coated with a Ni layer. The obtained composite powder was classified and shown in Table 1.
1. The composite powder for thermal spraying of the present invention having the average particle diameter of Ti and the thickness of Ni layer shown in (hereinafter, referred to as the composite powder of the present invention) 1 to
10 was produced.
【００１８】Ｔｉ−６％Ａｌ−４％ＶからなるＴｉ合金
製エンジンバルブを用意し、このＴｉ合金製エンジンバ
ルブのフェース面に上記本発明複合粉末１〜１０を用い
て下記の条件で大気プラズマ溶射を行い、膜厚：１００
μｍの溶射皮膜を形成した。A Ti alloy engine valve made of Ti-6% Al-4% V was prepared, and the above-mentioned composite powders 1 to 10 of the present invention were used on the face surface of the Ti alloy engine valve under the following conditions to obtain an atmospheric plasma. Thermal spraying, film thickness: 100
A sprayed coating of μm was formed.
【００１９】大気プラズマ溶射条件 プラズマガス：Ａｒガス、 プラズマガス流量：１．１×１０-3ｍ3 ／sec.、 電流：４００Ａ、 電圧：８０Ｖ、 溶射速度：０．５gr／sec.、 キャリアガス流量：５．７×１０-5ｍ3 ／sec.、 溶射距離：１００mm、 フェース面移動速度：５００mm／sec.。Atmospheric plasma spraying conditions Plasma gas: Ar gas, plasma gas flow rate: 1.1 × 10 −3 m 3 / sec., Current: 400 A, voltage: 80 V, spraying rate: 0.5 gr / sec., Carrier gas Flow rate: 5.7 × 10 -5 m 3 / sec., Spraying distance: 100 mm, face surface moving speed: 500 mm / sec.
【００２０】本発明複合粉末１を用いて形成した溶射皮
膜の表面を研摩し、金属顕微鏡により観察した組織の写
生図を図３に示す。図３の写生図からも明らかなよう
に、本発明複合粉末１を用いて形成した溶射皮膜は、Ｎ
ｉ素地３ａ中にＮｉＴｉ金属間化合物層４ａで被覆され
たＴｉ粒子２ａが均一に分散した組織を有していること
がわかる。FIG. 3 shows a diagram of the structure of the sprayed coating formed by using the composite powder 1 of the present invention, which was polished and the surface was observed with a metallurgical microscope. As is clear from the drawing of FIG. 3, the thermal spray coating formed by using the composite powder 1 of the present invention is N
It can be seen that the Ti particles 2a coated with the NiTi intermetallic compound layer 4a are uniformly dispersed in the i base 3a.
【００２１】本発明複合粉末１〜１０を溶射して得られ
た溶射皮膜を有するＴｉ合金製エンジンバルブを２００
０ccのガソリンエンジンの吸気用バルブとして組み込
み、 回転数：７５００r.p.m. 運転時間：１００時間 の条件でエンジンを作動させた。この時Ｔｉ合金製エン
ジンバルブのフェース面の溶射皮膜は２５℃と９５０℃
の冷却加熱の繰り返しによる熱衝撃を受け、さらにフェ
ース面の溶射皮膜はバルブシートと衝撃摩擦を受けてお
り、１００時間の運転終了後エンジンバルブを取り出し
てエンジンバルブフェース面に形成された溶射皮膜の比
摩耗量および剥離の有無を観察し、その結果を表１に示
した。200 engine valves made of a Ti alloy having a sprayed coating obtained by spraying the composite powders 1 to 10 of the present invention
It was installed as an intake valve for a 0cc gasoline engine, and the engine was operated under the conditions of rotation speed: 7500 rpm and operating time: 100 hours. At this time, the thermal spray coating on the face surface of the Ti alloy engine valve was 25 ° C and 950 ° C.
The thermal sprayed film on the face surface is also subjected to shock friction with the valve seat due to repeated cooling and heating, and after 100 hours of operation, the engine valve is taken out and the thermal sprayed film formed on the engine valve face surface is removed. The specific wear amount and the presence or absence of peeling were observed, and the results are shown in Table 1.
【００２２】さらに比較のために、Ｎｉ：Ｔｉ＝１：１
の割合となるように溶製しアトマイズして得られた従来
アトマイズ粉末を同上の条件で上記Ｔｉ合金製エンジン
バルブのフェース面に溶射し、同様にして２０００ccの
ガソリンエンジンの吸気用バルブとして組み込み、１０
０時間の運転終了後、フェース面の溶射皮膜の比摩耗量
および剥離の有無を観察し、その結果を表１に示した。For comparison, Ni: Ti = 1: 1.
The conventional atomized powder obtained by smelting and atomizing so as to have a ratio of is sprayed on the face surface of the Ti alloy engine valve under the same conditions, and is similarly incorporated as an intake valve for a 2000 cc gasoline engine, 10
After the operation for 0 hours, the specific wear amount of the sprayed coating on the face surface and the presence or absence of peeling were observed, and the results are shown in Table 1.
【００２３】[0023]
【表１】 [Table 1]
【００２４】[0024]
【発明の効果】表１に示される結果から、本発明複合粉
末１〜１０を溶射して得られた溶射皮膜は、長時間の熱
衝撃および衝撃摩擦を受けても剥離することがなく、比
摩耗量が少ないところから耐摩耗性にも優れていること
がわかる。From the results shown in Table 1, the sprayed coatings obtained by spraying the composite powders 1 to 10 of the present invention did not peel off even when subjected to thermal shock and shock friction for a long period of time. It can be seen that the wear resistance is excellent because the wear amount is small.
【００２５】上述のように、この発明の溶射用複合粉末
は、耐熱衝撃性、耐摩耗性および密着性に優れた溶射皮
膜を形成することができ、産業上すぐれた効果をもたら
すものである。As described above, the composite powder for thermal spraying of the present invention can form a thermal spray coating excellent in thermal shock resistance, wear resistance and adhesion, and has excellent industrial effects.
【図１】この発明の溶射用複合粉末の断面図である。FIG. 1 is a sectional view of a thermal spraying composite powder of the present invention.
【図２】この発明の溶射用複合粉末をプラズマ溶射する
時の複合粉末の挙動を示す断面説明図である。FIG. 2 is an explanatory sectional view showing the behavior of the composite powder when plasma spraying the composite powder for thermal spraying of the present invention.
【図３】この発明の溶射用複合粉末を用いて形成した溶
射皮膜の組織写生図である。FIG. 3 is a structural image of a thermal spray coating formed using the thermal spray composite powder of the present invention.
１ 本発明溶射用複合粉末 ２ Ｔｉ粉末 ３ Ｎｉ層 ４ ＮｉＴｉ金属間化合物層 ５ 基材 ６ プラズマ ７ 溶射皮膜 ２ａ Ｔｉ粒子 ４ａ ＮｉＴｉ金属間化合物層 1 Inventive Composite Powder 2 Ti Powder 3 Ni Layer 4 NiTi Intermetallic Compound Layer 5 Base Material 6 Plasma 7 Thermal Spray Coating 2a Ti Particles 4a NiTi Intermetallic Compound Layer
Claims (3)
ことを特徴とする溶射用複合粉末。1. A composite powder for thermal spraying, characterized in that the surface of Ti powder is coated with a Ni layer.
り、平均粒径が１０〜１５０μｍであることを特徴とす
る溶射用複合粉末。2. A composite powder for thermal spraying, characterized in that the surface of Ti powder is coated with a Ni layer, and the average particle size is 10 to 150 μm.
さは５μｍ以上であり、かつＴｉ粉末粒径：Ｎｉ層厚＝
１０以下：１であることを特徴とする溶射用複合粉末。3. The thickness of the Ni layer covering the surface of the pure Ti powder is 5 μm or more, and the Ti powder particle diameter: Ni layer thickness =
10. The composite powder for thermal spraying, which is 10 or less: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8337395A JPH08253851A (en) | 1995-03-15 | 1995-03-15 | Composite powder for thermal spraying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8337395A JPH08253851A (en) | 1995-03-15 | 1995-03-15 | Composite powder for thermal spraying |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08253851A true JPH08253851A (en) | 1996-10-01 |
Family
ID=13800626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8337395A Withdrawn JPH08253851A (en) | 1995-03-15 | 1995-03-15 | Composite powder for thermal spraying |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08253851A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6582763B1 (en) | 1999-01-29 | 2003-06-24 | Nisshin Seifun Group Inc. | Process for producing oxide coated fine metal particles |
| WO2010136777A1 (en) * | 2009-05-28 | 2010-12-02 | Bedi, Kathryn Jane | Coating method |
| JP2020029594A (en) * | 2018-08-22 | 2020-02-27 | トヨタ自動車東日本株式会社 | Slide member and manufacturing method thereof |
-
1995
- 1995-03-15 JP JP8337395A patent/JPH08253851A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6582763B1 (en) | 1999-01-29 | 2003-06-24 | Nisshin Seifun Group Inc. | Process for producing oxide coated fine metal particles |
| DE10003982B4 (en) * | 1999-01-29 | 2008-07-10 | Nisshin Engineering Inc. | Oxide-coated fine metal particles and process for their preparation |
| WO2010136777A1 (en) * | 2009-05-28 | 2010-12-02 | Bedi, Kathryn Jane | Coating method |
| EP2824217A1 (en) * | 2009-05-28 | 2015-01-14 | Taragenyx Limited | Coating method |
| US9237989B2 (en) | 2009-05-28 | 2016-01-19 | Taragenyx Limited | Coating method |
| US9421151B2 (en) | 2009-05-28 | 2016-08-23 | Taragenyx Limited | Coating method |
| JP2020029594A (en) * | 2018-08-22 | 2020-02-27 | トヨタ自動車東日本株式会社 | Slide member and manufacturing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020604 |