JPH07316771A - Thermal spray material - Google Patents
Thermal spray materialInfo
- Publication number
- JPH07316771A JPH07316771A JP11828594A JP11828594A JPH07316771A JP H07316771 A JPH07316771 A JP H07316771A JP 11828594 A JP11828594 A JP 11828594A JP 11828594 A JP11828594 A JP 11828594A JP H07316771 A JPH07316771 A JP H07316771A
- Authority
- JP
- Japan
- Prior art keywords
- thermal spray
- spray material
- content
- oxidation resistance
- particles
- 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】本発明は耐高温摩耗コーティング
用溶射材料に関する。FIELD OF THE INVENTION This invention relates to thermal spray materials for high temperature wear resistant coatings.
【０００２】[0002]
【従来の技術】溶射は従来から耐摩耗コーティングとし
ても利用されているが、その耐摩耗用溶射材料の主なも
のはタングステン炭化物又はクロム炭化物系サーメット
材料及び高クロム鉄系であり、一部にはアルミナやクロ
ミアなどのセラミックスも用いられている。2. Description of the Related Art Although thermal spraying has been used as a wear-resistant coating, the main wear-resistant thermal-spraying materials are tungsten carbide or chromium carbide-based cermet materials and high chromium iron-based materials. Ceramics such as alumina and chromia are also used.
【０００３】[0003]
【発明が解決しようとする課題】しかし、タングステン
炭化物及びクロム炭化物系サーメット溶射材料による溶
射皮膜は高硬度で耐摩耗性も優れるが、通常の金属材料
やセラミックス材料と比較して著しくコスト高であり、
製品に適用した場合の経済性に大きな問題がある。ま
た、タングステン炭化物系サーメットは耐酸化性が劣り
５００℃以上の酸化雰囲気での使用はできない。However, although the thermal spray coating made of tungsten carbide and chromium carbide cermet thermal spray material has high hardness and excellent wear resistance, it is significantly higher in cost than ordinary metal materials and ceramic materials. ,
There is a big problem in economic efficiency when applied to products. Further, the tungsten carbide cermet is inferior in oxidation resistance and cannot be used in an oxidizing atmosphere at 500 ° C. or higher.
【０００４】１３クロム系ステンレス鋼や２５クロム鋳
鉄系をベースとした高クロム鉄系溶射材料は硬さが比較
的低く、また耐酸化性も十分ではない。さらに、溶射粒
子間の結合力が弱くエロージョンやアブレージョンへの
対策材料としては不適である。High-chromium iron-based thermal spray materials based on 13-chromium stainless steel and 25-chromium cast iron have relatively low hardness and insufficient oxidation resistance. Furthermore, the bonding force between the sprayed particles is weak and it is unsuitable as a material against erosion and abrasion.
【０００５】アルミナやクロミアなどのセラミックスは
耐酸化性は優れるが、溶射粒子間の結合力が弱くエロー
ジョンやアブレージョンに対しては効果が小さいこと
と、線膨張係数が金属材料よりも低く高温用途として必
要な耐ヒートサイクル性にも問題がある。Ceramics such as alumina and chromia are excellent in oxidation resistance, but have a weak bonding force between spray particles and have a small effect on erosion and abrasion, and have a linear expansion coefficient lower than that of metal materials and are suitable for high temperature applications. There is also a problem with the required heat cycle resistance.
【０００６】本発明は耐高温酸化特性に優れた溶射皮膜
を経済的に形成しうる溶射材料を提供することを課題と
している。An object of the present invention is to provide a thermal spray material capable of economically forming a thermal spray coating excellent in high temperature oxidation resistance.
【０００７】[0007]
【課題を解決するための手段】本発明は、前記課題を解
決し経済性を高めた溶射皮膜を形成させるために溶射材
料は金属系をベースとしその基本組成を高炭素高クロム
鉄系とした。これによりサーメットやセラミックスより
も非常に低いコストで溶射材料を製造できる。According to the present invention, in order to solve the above-mentioned problems and form a thermal spray coating with improved economy, the thermal spray material is based on metal and its basic composition is high carbon high chromium iron system. . This allows the thermal spray material to be manufactured at a much lower cost than cermets and ceramics.
【０００８】すなわち、本発明による溶射材料は、重量
パーセントでＣ：５．０〜６．５、Ｃr ：２５〜３５、
Ｍ ，Ｖ，Ｎｂの１種以上を５〜１５、残りがＦe と不
可避的不純物からなる化学成分を有し、かつ、粒径が５
０μm 以上の粒子の含有率を１０％以下とした組成を採
用する。That is, the thermal spray material according to the present invention has a weight percentage of C: 5.0 to 6.5, C r : 25 to 35,
M, V, 5 to 15 1 or more of Nb, has the chemical component balance being F e and inevitable impurities, and a particle size 5
A composition in which the content of particles of 0 μm or more is 10% or less is adopted.
【０００９】この組成を採用した理由は次のとおりであ
る。まず、本発明による溶射材料で形成した溶射皮膜は
Ｃr7Ｃ3 炭化物を多く含有するため高硬度となり耐摩耗
性の必要条件を満足させる。The reason for using this composition is as follows. First, the thermal spray coating formed by thermal spraying material according to the present invention satisfies the high hardness and be wear resistant requirement for a high content of C r7 C 3 carbides.
【００１０】また、耐酸化性を増すためにマトリックス
中のクロム量を多くした。つまり、これらの硬さと耐酸
化性の両者を向上させるために、Ｃ量を５．０〜６．５
％としクロム量を２５〜３５％とした。Further, the amount of chromium in the matrix is increased in order to increase the oxidation resistance. That is, in order to improve both the hardness and the oxidation resistance, the C content is 5.0 to 6.5.
% And the amount of chromium was 25 to 35%.
【００１１】さらにＭO ，Ｖ，Ｎｂの硬化元素の少なく
とも１種以上を５％以上添加することにより高い硬さを
安定して実現させた。なお、ＭO ，Ｖ，Ｎｂは経済性を
考慮しその上限を１５％とした。Furthermore, high hardness is stably realized by adding 5% or more of at least one of the hardening elements of M O , V and Nb. The upper limit of M O , V, and Nb is set to 15% in consideration of economy.
【００１２】溶射皮膜の耐摩耗性を高めるためには溶射
粒子間の結合力の向上が必要であり、そのために本発明
の溶射材料では粒子の直径が５０μm 以上のものを１０
％以下とすることにより溶射過程における粒子の溶融効
率を高め、粒子間の結合力を増大し緻密な皮膜を形成す
ることにより耐摩耗性を向上した。In order to improve the wear resistance of the thermal spray coating, it is necessary to improve the bonding force between the thermal spray particles. Therefore, the thermal spray material of the present invention has a particle diameter of 50 μm or more.
% Or less, the melting efficiency of particles in the thermal spraying process is increased, the bonding force between particles is increased, and a dense film is formed to improve wear resistance.
【００１３】[0013]
【作用】以上説明した本発明による溶射材料における粉
末の粒子の組織はＣr7Ｃ3 （ただしＣr 中には一部Ｆe
なども含む）が多く晶出し、これをマトリックスで固め
ている。Ｃr7Ｃ3 は硬さが約Ｈv ＝１６００と高く耐摩
耗性を向上させる。また、Ｃr7Ｃ 3 は耐酸化性にも優れ
る。マトリックスにはＣr7Ｃ3 を形成した残りの多くの
Ｃ r を含有しているためステンレス鋼と同等の耐酸化性
を示す。これにより耐摩耗性と耐酸化性の両者が高めら
れる。[Function] The powder in the thermal spray material according to the present invention described above
The final particle structure is Cr7C3(However, CrSome Fe
(Including etc.) crystallizes a lot, and this is hardened with a matrix
ing. Cr7C3Is about Hv= 1600 and high abrasion resistance
Improves wear resistance. Also, Cr7C 3Has excellent oxidation resistance
It C for the matrixr7C3Many of the rest that formed
C rOxidation resistance equivalent to that of stainless steel because it contains
Indicates. This improves both wear resistance and oxidation resistance.
Be done.
【００１４】さらに粉末粒子の粒径を５０μm 以上の含
有率を１０％以下とすることにより、溶射過程中の粒子
の溶融が十分となり粒子間結合力を高める。従ってエロ
ージョンやアブレージョンに対しても優れた耐久性を示
す。Further, by setting the content of the powder particles having a particle size of 50 μm or more to 10% or less, the particles are sufficiently melted during the thermal spraying process and the interparticle bonding force is enhanced. Therefore, it exhibits excellent durability against erosion and abrasion.
【００１５】[0015]
【実施例】表１は本発明に係わる溶射材料についての実
験結果を示す。溶射皮膜はオーステナイト系ステンレス
鋼（ＪＩＳ ＳＵＳ３０４) 板４０Ｗ×４０Ｌ×１０Tm
mの平面上に１mm厚さに形成した。皮膜の特性試験は６
５０℃×５００ｈの高温酸化試験と６５０℃での高温エ
ロージョン試験を行った。EXAMPLES Table 1 shows the experimental results for the thermal spray material according to the present invention. Thermal spray coating is austenitic stainless steel (JIS SUS304) plate 40W × 40L × 10Tm
It was formed with a thickness of 1 mm on a plane of m. Characteristic test of coating is 6
A high temperature oxidation test at 50 ° C. × 500 h and a high temperature erosion test at 650 ° C. were performed.
【００１６】高温エロージョン試験条件は平均粒径２５
μm のけい砂を用い吹き付け速度１００m/s 、吹き付け
角度４０deg で５０ｈの連続試験を行い、その最大摩耗
深さを計測した。また高温酸化試験は酸化皮膜厚さを計
測した。The high temperature erosion test condition is an average particle size of 25.
A continuous test was carried out for 50 hours at a spraying speed of 100 m / s and a spraying angle of 40 deg using silica sand of μm, and the maximum wear depth was measured. In the high temperature oxidation test, the oxide film thickness was measured.
【００１７】なお、この時の溶射はプラズマ溶射としプ
ラズル溶射条件は、プラズマガスＡ r ４０リットル／min ＋
Ｈ2 ５リットル／min 、プラズマアーク電流５５０Ａ、プラ
ズマアーク電圧６２Ｖ、溶射距離１２０mmとした。ま
た、溶射材料粉末の粒径は１０〜５０μm 内が９５％以
上のものとした。The thermal spraying at this time is plasma spraying.
Razzle spraying conditions are plasma gas A r40 liters / min +
H25 liter / min, plasma arc current 550A, plastic
The Zuma arc voltage was 62 V and the spraying distance was 120 mm. Well
Also, the particle size of the thermal spray material powder is 95% or less within 10 to 50 μm.
The one above.
【００１８】表１より耐高温エロージョン性と耐酸化性
の両者を満足するためにはＣ：５．０〜６．５％、
Ｃr ：２５％以上及びＭO ，Ｖ，Ｎｂのうち少なくとも
１種以上が５％以上必要であることが判る。なお、Ｃが
６．５％を越えると耐摩耗性は良好であるがマトリック
ス中のＣr 量が減少して耐酸化性が低下する。From Table 1, in order to satisfy both high temperature erosion resistance and oxidation resistance, C: 5.0 to 6.5%,
C r: 25% or more and M O, V, at least one or more of Nb is understood that it is necessary more than 5%. When C exceeds 6.5%, the wear resistance is good, but the amount of C r in the matrix decreases and the oxidation resistance decreases.
【００１９】表２は表１で得られた特性の良好な溶射材
料について、その粒径分布を変化させて同様の高温エロ
ージョン試験を行った結果である。粒径が５０μm の粒
子が１０％を越えると耐摩耗性が著しく低下する。これ
は粒子間結合力が低下することと皮膜中に気孔等の欠陥
が増すためである。Table 2 shows the results of the same high temperature erosion test performed on the thermal spray material having good characteristics obtained in Table 1 while changing the particle size distribution. If the content of particles having a particle size of 50 μm exceeds 10%, the wear resistance is significantly reduced. This is because the bond strength between particles is reduced and defects such as pores are increased in the film.
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【表２】 [Table 2]
【００２２】[0022]
【発明の効果】本発明に係わる溶射材料は経済的に高硬
度でかつ耐高温酸化特性に優れた溶射皮膜を提供するこ
とを可能とする。これにより高温摩耗環境で使用する機
器部材の使用寿命を著しく伸ばすことができる。従って
その機種の運用効率は飛躍的に向上し産業上の効果は非
常に大きなものがある。Industrial Applicability The thermal spray material according to the present invention makes it possible to economically provide a thermal spray coating having high hardness and excellent high temperature oxidation resistance. As a result, the service life of the equipment member used in a high temperature wear environment can be significantly extended. Therefore, the operational efficiency of the model is dramatically improved, and the industrial effect is very large.
Claims (1)
Ｃr ：２５〜３５、ＭO ，Ｖ，Ｎｂの１種以上を５〜１
５、残りがＦe と不可避的不純物からなる化学成分を有
し、かつ、粒径が５０μm 以上の粒子の含有率を１０％
以下としたことを特徴とする溶射材料。1. A weight percentage of C: 5.0 to 6.5,
C r : 25 to 35, 5 to 1 of at least one of M O , V, and Nb
5, has a chemical composition the remainder consisting of F e and inevitable impurities, and the content of the particle size 50μm or more particles 10%
A thermal spray material characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11828594A JPH07316771A (en) | 1994-05-31 | 1994-05-31 | Thermal spray material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11828594A JPH07316771A (en) | 1994-05-31 | 1994-05-31 | Thermal spray material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07316771A true JPH07316771A (en) | 1995-12-05 |
Family
ID=14732890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11828594A Pending JPH07316771A (en) | 1994-05-31 | 1994-05-31 | Thermal spray material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07316771A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0902099A1 (en) * | 1997-09-10 | 1999-03-17 | Eidgenössische Materialprüfungs- und Forschungsanstalt Empa Thun | Wear and corrosion resistant surfaces |
-
1994
- 1994-05-31 JP JP11828594A patent/JPH07316771A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0902099A1 (en) * | 1997-09-10 | 1999-03-17 | Eidgenössische Materialprüfungs- und Forschungsanstalt Empa Thun | Wear and corrosion resistant surfaces |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20010313 |