JP5257756B2 - Iron-based thermal spray coating, method for forming the same, and sliding member - Google Patents
Iron-based thermal spray coating, method for forming the same, and sliding member Download PDFInfo
- Publication number
- JP5257756B2 JP5257756B2 JP2008135411A JP2008135411A JP5257756B2 JP 5257756 B2 JP5257756 B2 JP 5257756B2 JP 2008135411 A JP2008135411 A JP 2008135411A JP 2008135411 A JP2008135411 A JP 2008135411A JP 5257756 B2 JP5257756 B2 JP 5257756B2
- Authority
- JP
- Japan
- Prior art keywords
- iron
- thermal spray
- spray coating
- based thermal
- aluminum alloy
- 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.)
- Active
Links
Images
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
- Coating By Spraying Or Casting (AREA)
Description
本発明は、鉄系溶射被膜及びその形成方法並びに摺動部材に係り、更に詳細には、高面圧下での耐剥離性に優れ、且つ優れた耐摩耗性と耐スカッフ性を実現し得る鉄系溶射被膜、その形成方法、及び該鉄系溶射被膜を備える摺動部材に関する。
また、本発明は、自動車内燃機関用シリンダーブロック、特にボア内面に良好に適用することができる。
The present invention relates to an iron-based thermal spray coating, a method for forming the same, and a sliding member. More specifically, the present invention is an iron that is excellent in peeling resistance under high surface pressure and can realize excellent wear resistance and scuff resistance. The present invention relates to a thermal spray coating, a method for forming the thermal spray coating, and a sliding member provided with the iron thermal spray coating.
Further, the present invention can be applied well to a cylinder block for an automobile internal combustion engine, particularly to an inner surface of a bore.
摺動部材の一例として、従来の自動車内燃機関用シリンダーブロックにおいては、ボア面として鋳鉄製ライナーを鋳包んだアルミ合金製シリンダーブロックが主流であるが、エンジン部品軽量化の観点から、鋳鉄製ライナーの代わりにアルミ製ライナーを鋳包んだタイプのシリンダーブロックや、完全に鋳鉄製ライナーを廃止したアルミ合金製モノブロックの開発が進められている。 As an example of a sliding member, in a conventional cylinder block for an internal combustion engine of an automobile, an aluminum alloy cylinder block in which a cast iron liner is cast as a bore surface is the mainstream, but from the viewpoint of reducing engine parts weight, a cast iron liner is used. Instead of this, the development of cylinder blocks with cast aluminum liners and aluminum alloy monoblocks with completely abolished cast iron liners is underway.
しかし、アルミ製ライナーやアルミ合金製モノブロックでは、耐摩耗性や耐スカッフ性に問題があり、ニッケルメッキ等のメッキ処理が施される場合もあるが、耐摩耗性や耐スカッフ性に関しては十分ではない。
その代わりとして、プラズマ火炎によって溶射粉末や溶射ワイヤーを溶融させた溶滴を、シリンダーボア内面に噴き付けて溶射被膜を形成することにより、耐摩耗性や耐スカッフ性を向上させた方策が取られている。例えば、エンジン用シリンダーブロックのボア表面に鉄系合金粉末を溶射することによって、ピストンリング及びピストンに対する耐摩耗性及び耐スカッフ性の向上を図っている（例えば、特許文献１参照）。
Instead, measures are taken to improve wear resistance and scuff resistance by spraying a droplet of molten thermal spray powder or wire by plasma flame onto the inner surface of the cylinder bore to form a thermal spray coating. ing. For example, by spraying iron-based alloy powder onto the bore surface of an engine cylinder block, the wear resistance and scuff resistance of the piston ring and piston are improved (see, for example, Patent Document 1).
上述のように、鉄系合金粉末を溶射して形成された従来の溶射被膜では、ピストンリング及びピストンに対する耐摩耗性及び耐スカッフ性の向上を図っているが、例えば最近の高出力エンジンのように非常に高い筒内圧がかかるシリンダーブロックでは、高い燃焼圧によって溶射被膜に繰り返しの高荷重が負荷されるため、溶射被膜内部で亀裂・剥離が発生することがわかっている。このような溶射被膜内部での剥離が大きくなるとオイル消費が悪化し、更に溶射被膜が完全な剥離にまで達すると、ピストンリングやピストンとのスカッフの要因となる。 As described above, the conventional thermal spray coating formed by spraying iron-based alloy powder improves the wear resistance and scuff resistance of the piston ring and piston. It has been found that, in a cylinder block in which a very high in-cylinder pressure is applied, repeated high loads are applied to the thermal spray coating due to the high combustion pressure, and therefore cracks and peeling occur inside the thermal spray coating. When the peeling inside the sprayed coating increases, the oil consumption deteriorates, and when the sprayed coating reaches a complete peeling, it causes a scuffing with the piston ring and the piston.
また、現行の鋳鉄ライナーに比べて、アルミモノブロックやニッケルメッキ品では耐摩耗性や耐スカッフ性に問題があるため、鉄溶射を採用する場合には、耐摩耗性や耐スカッフ性を向上させる方策が必要である。 In addition, compared to current cast iron liners, aluminum monoblock and nickel-plated products have problems with wear resistance and scuff resistance. Measures are needed.
本発明は、このような従来技術の有する課題に鑑みてなされたものであり、その目的とするところは、高出力エンジンにおいても十分な耐久性（耐剥離性）を発現でき、優れた耐摩耗性や耐スカッフ性を併せて実現し得る鉄系溶射被膜、その形成方法及び摺動部材を提供することにある。 The present invention has been made in view of such problems of the prior art, and the object of the present invention is to exhibit sufficient durability (peeling resistance) even in a high-power engine, and excellent wear resistance. The present invention provides an iron-based thermal spray coating that can achieve both properties and scuff resistance, a method for forming the same, and a sliding member.
本発明者らは、上記目的を達成すべく鋭意検討を重ねた結果、鉄系溶射被膜の原料となる材料成分を適切に制御することにより、高い燃焼圧負荷環境においても十分な耐久性（耐剥離性）が実現でき、上記目的が達成できることを見出し、本発明を完成するに至った。 As a result of intensive studies to achieve the above object, the present inventors have adequately controlled the material components used as the raw material for the iron-based thermal spray coating, thereby providing sufficient durability (resistance to high resistance) even in a high combustion pressure load environment. The present invention has been completed by finding that the above-mentioned object can be achieved.
即ち、本発明の鉄系溶射被膜は、アルミ合金製母材の表面を被覆する鉄系溶射被膜に関するものである。上記鉄系溶射被膜の主原料である線材又は粉末が鉄を主成分とし、
上記線材又は粉末に含まれる炭素量（Ｃ）が、０．１２≦Ｃ≦０．４２（質量％）の範囲にあり、
ニッケル（Ｎｉ）、クロム（Ｃｒ）及びモリブデン（Ｍｏ）から成る群より選ばれた少なくとも１種の元素を含み、炭素当量Ｃｅｑを次式（１）
Ｃｅｑ＝Ｃ＋Ｍｎ／６＋Ｓｉ／２４＋Ｎｉ／４０＋Ｃｒ／５＋Ｍｏ／４…（１）
（式中のＣ、Ｍｎ、Ｓｉ、Ｎｉ、Ｃｒ及びＭｏは各元素の添加量（質量％）を示す）で定義した場合、上記線材又は粉末が、０．３≦Ｃｅｑ≦０．９を満足する組成を有し、
被膜硬度がＨＶ３００〜５００の範囲内であり、
気孔を含み、断面積当たりの気孔率が２．１％以下であることを特徴とする。
That is, the iron-based sprayed coating of the present invention relates to an iron-based sprayed coating that covers the surface of an aluminum alloy base material. The wire or powder that is the main raw material of the iron-based thermal spray coating has iron as a main component,
The amount of carbon (C) contained in the wire or powder is in the range of 0.12 ≦ C ≦ 0.42 (mass%),
It contains at least one element selected from the group consisting of nickel (Ni), chromium (Cr) and molybdenum (Mo), and a carbon equivalent Ceq is represented by the following formula (1)
Ceq = C + Mn / 6 + Si / 24 + Ni / 40 + Cr / 5 + Mo / 4 (1)
(In the formula, C, Mn, Si, Ni, Cr, and Mo indicate the amount of each element added (% by mass)), the wire or powder satisfies 0.3 ≦ Ceq ≦ 0.9. Having a composition
The coating hardness is in the range of HV300-500,
Including pores, the porosity per cross-sectional area is 2.1% or less .
また、本発明の鉄系溶射被膜の形成方法は、上述のような鉄系溶射被膜を形成する方法であって、
プラズマ溶射によって、上記線材又は粉末の溶滴を上記アルミ合金製母材の表面に噴射することを特徴とする。
Moreover, the method for forming the iron-based sprayed coating of the present invention is a method for forming the iron-based sprayed coating as described above,
The droplets of the wire or powder are sprayed onto the surface of the aluminum alloy base material by plasma spraying.
更に、本発明の摺動部材は、アルミ合金製母材と、その表面に形成された鉄系溶射被膜を備える摺動部材である。
上記鉄系溶射被膜が、上述のような鉄系溶射被膜から成ることを特徴とする。
Furthermore, the sliding member of the present invention is a sliding member comprising an aluminum alloy base material and an iron-based thermal spray coating formed on the surface thereof.
The iron-based thermal spray coating is characterized by comprising the iron-based thermal spray coating as described above.
本発明によれば、鉄系溶射被膜の原料となる材料成分を適切に制御することとしたため、高出力エンジンにおいても十分な耐久性（耐剥離性）を発現でき、優れた耐摩耗性や耐スカッフ性を併せて実現し得る鉄系溶射被膜、その形成方法及び摺動部材を提供することができる。 According to the present invention, since the material component that is a raw material of the iron-based thermal spray coating is appropriately controlled, sufficient durability (peeling resistance) can be exhibited even in a high-power engine, and excellent wear resistance and resistance. It is possible to provide an iron-based sprayed coating that can realize scuffing properties, a method for forming the same, and a sliding member.
以下、本発明の鉄系溶射被膜、その製造方法及び摺動部材につき、内燃機関用のシリンダーブロックを例に採って、詳細に説明する。なお、本明細書において、「％」は特記しない限り質量百分率を表すものとする。 Hereinafter, the iron-based thermal spray coating of the present invention, the manufacturing method thereof, and the sliding member will be described in detail by taking a cylinder block for an internal combustion engine as an example. In the present specification, “%” represents mass percentage unless otherwise specified.
まず、製造工程であるが、アルミ合金製母材の一例であるシリンダーブロックを鋳造成型した後、溶射被膜の密着性を高めるために、シリンダーボア内表面を下地加工し、下地加工後のシリンダーボア内面に鉄系金属材料を液滴とし、溶射被膜を形成する。
ここで、鉄系金属材料を液滴とする際には、特許文献１（特開２０００−２１２７１７号公報）に記載されているように、鉄系合金粉末を使用することが一般的であるが、本発明においては、線材、具体的には鉄系ワイヤーを使用することが好ましい。
First, in the manufacturing process, after casting a cylinder block, which is an example of an aluminum alloy base material, in order to improve the adhesion of the sprayed coating, the inner surface of the cylinder bore is grounded and the cylinder bore after the grounding is processed. A spray coating is formed on the inner surface of the iron-based metal material as droplets.
Here, when the iron-based metal material is used as droplets, it is common to use iron-based alloy powder as described in Patent Document 1 (Japanese Patent Laid-Open No. 2000-212717). In the present invention, it is preferable to use a wire, specifically an iron-based wire.
溶射被膜の形成方法としては、例えば、円筒体の中心孔に挿入された溶射ガンを一端側から他端側へと移動させながら、この溶射ガン先端より燃焼炎によって溶融させた溶射粉末の溶滴を溶射フレームとして内面に噴き付けて溶射被膜を形成することができる。
溶射被膜の断面写真を図１に示すが、同図に示す溶射被膜は、この溶射被膜内に「気孔」及び「酸化鉄」を含んでいる。
As a method for forming the sprayed coating, for example, a droplet of sprayed powder melted by a combustion flame from the tip of the spray gun while moving the spray gun inserted into the center hole of the cylindrical body from one end side to the other end side. Can be sprayed on the inner surface as a thermal spray frame to form a thermal spray coating.
A cross-sectional photograph of the thermal spray coating is shown in FIG. 1, and the thermal spray coating shown in FIG. 1 includes “pores” and “iron oxide” in the thermal spray coating.
以下、本発明の鉄系溶射被膜を作製するための主原料となる線材（ワイヤー材）等の成分及び溶射後の被膜性状について説明する。 Hereinafter, components, such as a wire (wire material) used as the main raw material for producing the iron-type thermal spray coating of this invention, and the coating property after thermal spraying are demonstrated.
鉄系ワイヤー材や鉄系粉末に含まれる炭素量については、炭素量が低い場合には、十分な耐久性（耐剥離性）を確保できない。一方、炭素量が非常に高い場合には、相手攻撃性が高くなる場合があり、相手摺動部品であるピストン及びピストンリングを著しく摩耗させることがある。
そこで、鉄系ワイヤー材や鉄系粉末に含まれる炭素量（Ｃ）は、０．１２≦Ｃ≦０．４２（ｗｔ％）である。
As for the amount of carbon contained in the iron-based wire material and iron-based powder, sufficient durability (peeling resistance) cannot be ensured when the amount of carbon is low. On the other hand, when the amount of carbon is very high, the opponent's aggression may increase, and the piston and piston ring, which are counterpart sliding parts, may be significantly worn.
Therefore, the amount of carbon (C) contained in the iron-based wire material and iron-based powder is 0 . It is 12 <= C <= 0.42 (wt%).
次に、鉄系ワイヤー材や鉄系粉末に含まれる炭素当量（Ｃｅｑ＝Ｃ＋Ｍｎ／６＋Ｓｉ／２４＋Ｎｉ／４０＋Ｃｒ／５＋Ｍｏ／４）であるが、炭素当量が低い場合には、十分な耐久性（耐剥離性）を確保できないことがある。一方、炭素当量が高い場合には、相手攻撃性が高くなり、ピストン及びピストンリングを著しく摩耗させると共に、耐スカッフ性が悪化して、ピストン及びピストンリングとの焼き付きの原因となることがある。
そこで、鉄系ワイヤー材や鉄系粉末に含まれる炭素当量については、０．３≦Ｃｅｑ≦０．９に制御する。
Next, it is the carbon equivalent (Ceq = C + Mn / 6 + Si / 24 + Ni / 40 + Cr / 5 + Mo / 4) contained in the iron-based wire material and iron-based powder, but when the carbon equivalent is low, sufficient durability (peeling resistance) Property) may not be ensured. On the other hand, when the carbon equivalent is high, the opponent's aggression is increased, the piston and the piston ring are significantly worn, and the scuff resistance is deteriorated, which may cause seizure of the piston and the piston ring.
Such being the case, the carbon equivalent contained in iron-based wire material and iron-based powder, that controls the 0.3 ≦ Ceq ≦ 0.9.
次に、本発明の鉄系溶射被膜の被膜硬度であるが、この実施形態のように、溶射後にボア内面に形成された溶射被膜の被膜硬度については、低すぎると、相手ピストンリングによって著しいボア摩耗が発生する。一方、溶射被膜の被膜硬度が高すぎると、相手攻撃性が高くなり、相手摺動部品であるピストン及びピストンリングを著しく摩耗させることがある。よって、シリンダーブロックにおいては、溶射後にボア内面に形成された溶射被膜の被膜硬度は、ＨＶ３００〜５００の範囲内に制御する。 Next, regarding the coating hardness of the iron-based thermal spray coating of the present invention, as in this embodiment, if the coating hardness of the thermal spray coating formed on the inner surface of the bore after thermal spraying is too low, a significant bore is caused by the mating piston ring. Wear occurs. On the other hand, when the coating hardness of the thermal spray coating is too high, the opponent attacking property becomes high, and the piston and the piston ring which are the counterpart sliding parts may be significantly worn. Thus, in the cylinder block, the film hardness of the thermal sprayed coating formed on the bore inner surface after spraying, that controls the range of HV300～500.
更に、シリンダーブロックにおいて、溶射後にボア内面に形成された溶射被膜に含まれる気孔であるが、気孔はオイル溜りの効果を目的として付与されており、溶射被膜の耐スカッフ性を向上させる機能を果たす。しかし、溶射被膜に対する気孔率が高すぎると十分な耐久性（耐剥離性）を確保できないことがある。
かかる観点から、溶射後にボア内面に形成された溶射被膜の気孔率は２．１面積％以下とする。
Further, in the cylinder block, the pores included in the sprayed coating formed on the inner surface of the bore after spraying are provided for the purpose of retaining the oil, and serve to improve the scuff resistance of the sprayed coating. . However, if the porosity with respect to the thermal spray coating is too high, sufficient durability (peeling resistance) may not be ensured.
From this point of view, the porosity of the thermal sprayed coating formed on the bore inner surface after spraying shall be the 2.1 area% or less.
なお、この場合の気孔率は、溶射被膜断面写真において確認される気孔を、画像解析などによって数値化したものである。 In this case, the porosity is obtained by quantifying the pores confirmed in the cross-sectional photograph of the sprayed coating by image analysis or the like.
更にまた、溶射後にボア内面に形成された溶射被膜に含まれる酸化鉄であるが、酸化鉄は潤滑性を目的として付与されている。
溶射被膜に含まれる酸化鉄量が少ない場合には、耐スカッフ性が悪化し、相手ピストン及びピストンリングとの焼き付きの原因となることがある。一方、溶射被膜に含まれる酸化鉄が多い場合には、十分な耐久性（耐剥離性）を確保できないことがある。
よって、溶射後にボア内面に形成された溶射被膜に含まれる酸化鉄の体積率は、５〜３５体積％の範囲内であることが好ましい。
Furthermore, iron oxide contained in the thermal spray coating formed on the inner surface of the bore after thermal spraying is provided for the purpose of lubricity.
When the amount of iron oxide contained in the thermal spray coating is small, the scuff resistance is deteriorated, which may cause seizure with the counterpart piston and piston ring. On the other hand, when the iron oxide contained in the thermal spray coating is large, sufficient durability (peeling resistance) may not be ensured.
Therefore, the volume ratio of iron oxide contained in the sprayed coating formed on the inner surface of the bore after spraying is preferably in the range of 5 to 35% by volume.
なお、この場合の酸化鉄の体積率は、溶射被膜断面写真において確認される酸化鉄を、画像解析によって数値化したものである。 In this case, the volume ratio of iron oxide is obtained by quantifying the iron oxide confirmed in the cross-sectional photograph of the sprayed coating by image analysis.
以下、本発明を実施例及び比較例により更に詳細に説明するが、本発明はこれら実施例に限定されるものではない。 EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, this invention is not limited to these Examples.
（実施例１〜５、比較例１〜３）
母材であるアルミニウム合金表面に、表１に示すように、成分の異なる鉄系ワイヤー材を用い、プラズマ溶射法によって鉄系溶射被膜を形成した後、各例における摺動部材の評価用試験を切り出した。各例の摺動歩合の成分や性状を表１に示す。
( Examples 1-5, Comparative Examples 1-3 )
As shown in Table 1, on the surface of the aluminum alloy that is the base material, an iron-based thermal spray coating is formed by plasma spraying using an iron-based wire material having different components, and then the sliding member evaluation test in each example is performed. Cut out. Table 1 shows the components and properties of the sliding ratio in each example.
なお、表１において、炭素当量は、Ｃｅｑ（炭素当量）＝Ｃ＋Ｍｎ／６＋Ｓｉ／２４＋Ｎｉ／４０＋Ｃｒ／５＋Ｍｏ／４とした。また、気孔率は、溶射被膜の断面写真から、気孔の面積率を計測した。更に、酸化鉄量は、溶射被膜の断面写真から、酸化鉄の面積率を計測した。 In Table 1, the carbon equivalent was Ceq (carbon equivalent) = C + Mn / 6 + Si / 24 + Ni / 40 + Cr / 5 + Mo / 4. Moreover, the porosity measured the area ratio of the pore from the cross-sectional photograph of the sprayed coating. Furthermore, the amount of iron oxide was obtained by measuring the area ratio of iron oxide from a cross-sectional photograph of the sprayed coating.
［性能評価］
各例で得られた摺動部材の評価用試験片を用い、下記の性能評価を行った。
[Performance evaluation]
The following performance evaluation was performed using the test piece for evaluation of the sliding member obtained in each example.
（１）溶射被膜の剥離評価法
溶射被膜の剥離評価として、各例の評価用試験片を図２に示すブラスト試験機に供し、ブラスト試験前後の溶射試験片の重量を測定し、溶射被膜の減少量（剥離量）を耐剥離性の指標とした。試験条件は下記仕様とし、得られた試験結果を表２に示す。
・試験機概要：図２に示す
・試験片形状：５０×５０ｍｍ（肉厚５ｍｍ）
・ブラスト粒：アルミナ粒子
・照射量：５０ｇ／回で、計５回（２５０ｇ）
・測定方法：アルミナ粒子を溶射面に照射し、試験前後の溶射試験片の重量を測定する
(1) Peeling evaluation method for thermal spray coating As an evaluation for thermal spray coating peeling, the test specimens for evaluation in each example were subjected to the blast tester shown in FIG. 2, and the weight of the thermal spray test specimen before and after the blast test was measured. The decrease amount (peeling amount) was used as an index of the peel resistance. The test conditions are the following specifications, and the test results obtained are shown in Table 2.
・ Outline of testing machine: as shown in FIG. 2 ・ Test specimen shape: 50 × 50 mm (wall thickness 5 mm)
・ Blasting particles: Alumina particles ・ Irradiation amount: 50 g / time, total 5 times (250 g)
・ Measurement method: Alumina particles are irradiated onto the sprayed surface and the weight of the sprayed test specimen before and after the test is measured.
（２）ピストンリングとのスカッフ評価試験法
溶射被膜のスカッフ評価として、各例の評価用試験片を図３に示す摺動試験機に供し、各試験片の耐スカッフ荷重を測定した。試験条件は下記仕様とし、得られた試験結果を表２に示す。
・試験機概要：図３に示す
・測定方法：１０ｋｇｆづつ荷重を与え、摩擦力急増点をリングスカッフ荷重とする
・摺動速度：０．２ｍ／ｓ
・温度：２５℃
・潤滑油：５Ｗ３０ＳＬ（初期塗布のみ）
・相手摺動材（ピストンリング相当）：炭素鋼を基材とし、摺動面にＣｒＮを被覆した
(2) Scuff evaluation test method with piston ring As a scuff evaluation of the thermal spray coating, the test piece for evaluation of each example was subjected to a sliding tester shown in FIG. 3, and the scuff resistance of each test piece was measured. The test conditions are the following specifications, and the test results obtained are shown in Table 2.
・ Outline of testing machine: as shown in FIG. 3 ・ Measuring method: A load of 10 kgf is given, and a point where the frictional force is rapidly increased is a ring scuff load.
・ Temperature: 25 ℃
・ Lubricant: 5W30SL (only initial application)
・ Sliding material (equivalent to piston ring): Carbon steel is used as the base material and the sliding surface is coated with CrN
（３）ピストンリングとの摩耗評価試験法
溶射被膜のフリクション評価法として、各例の評価用試験片を図４に示す往復動摩擦摩耗試験機に供し、溶射試験材と相手ピストンリング材の摩耗量を測定した（形状測定器を用いて摩耗減肉量を計測）。試験条件は下記仕様とし、得られた試験結果を表２に示す。
・試験機概要：図４に示す
・摺動速度：０．５ｍ／ｓ
・温度：２５℃
・押付け加重：１０ｋｇｆ
・試験時間：１時間
・潤滑油：５Ｗ３０ＳＬ
・相手材（ピストンリング相当）：炭素鋼を基材とし、摺動面にＣｒＮを被覆した
(3) Wear evaluation test method with piston ring As a friction evaluation method for thermal spray coating, the test piece for each example was subjected to the reciprocating frictional wear tester shown in FIG. (Abrasion thinning amount was measured using a shape measuring instrument). The test conditions are the following specifications, and the test results obtained are shown in Table 2.
・ Outline of testing machine: as shown in FIG. 4 ・ Sliding speed: 0.5 m / s
・ Temperature: 25 ℃
・ Pressing load: 10kgf
・ Test time: 1 hour ・ Lubricant: 5W30SL
-Partner material (equivalent to piston ring): Carbon steel is used as the base material, and the sliding surface is coated with CrN.
なお、表２において、剥離試験結果は、実施例１の重量減少量を基準値１．０とした。数値が小さいほど耐剥離性が良好であることを示している。
スカッフ試験結果は、スカッフが発生した押し付け荷重（ｋｇ）をスカッフ荷重とた。数値が大きいほど耐スカッフ性に優れていることを示している。
摩耗試験結果は、実施例１の摩耗量を基準値１．０とした。「溶射被膜摩耗量」は数値が小さいほど溶射被膜自身の摩耗が小さいことを示しており、「相手材摩耗量」は数値が小さいほど相手材の摩耗量が小さく、相手攻撃性の問題が無いことを示している。
In Table 2, the peel test results are based on the weight loss amount of Example 1 being 1.0. The smaller the value, the better the peel resistance.
The scuffing test results were defined as the scuffing load (kg) where the scuffing occurred. The larger the value, the better the scuff resistance.
As a result of the abrasion test, the abrasion amount of Example 1 was set to a reference value of 1.0. The smaller the numerical value, the smaller the numerical value, the smaller the wear of the thermal spray coating. The smaller the numerical value, the smaller the wear amount of the mating material, and there is no problem of attacking the mating material. It is shown that.
表１及び表２より、本発明の範囲に属する実施例１〜実施例５は、本発明の範囲外である比較例１〜比較例３よりも耐剥離性、耐スカッフ特性及び耐摩耗性に優れていることがわかる。 From Table 1 and Table 2, Examples 1 to 5 belonging to the scope of the present invention are more resistant to peeling, scuffing and abrasion than Comparative Examples 1 to 3 which are outside the scope of the present invention. It turns out that it is excellent.
Claims (5)
上記鉄系溶射被膜の主原料である線材又は粉末が鉄を主成分とし、
上記線材又は粉末に含まれる炭素量（Ｃ）が、０．１２≦Ｃ≦０．４２（質量％）の範囲にあり、
ニッケル（Ｎｉ）、クロム（Ｃｒ）及びモリブデン（Ｍｏ）から成る群より選ばれた少なくとも１種の元素を含み、炭素当量Ｃｅｑを次式（１）
Ｃｅｑ＝Ｃ＋Ｍｎ／６＋Ｓｉ／２４＋Ｎｉ／４０＋Ｃｒ／５＋Ｍｏ／４…（１）
（式中のＣ、Ｍｎ、Ｓｉ、Ｎｉ、Ｃｒ及びＭｏは各元素の添加量（質量％）を示す）で定義した場合、上記線材又は粉末が、０．３≦Ｃｅｑ≦０．９を満足する組成を有し、
被膜硬度がＨＶ３００〜５００の範囲内であり、
気孔を含み、断面積当たりの気孔率が２．１％以下であることを特徴とする鉄系溶射被膜。 In the iron-based thermal spray coating that covers the surface of the aluminum alloy base material,
The wire or powder that is the main raw material of the iron-based thermal spray coating has iron as a main component,
The amount of carbon (C) contained in the wire or powder is in the range of 0.12 ≦ C ≦ 0.42 (mass%),
It contains at least one element selected from the group consisting of nickel (Ni), chromium (Cr) and molybdenum (Mo), and a carbon equivalent Ceq is represented by the following formula (1)
Ceq = C + Mn / 6 + Si / 24 + Ni / 40 + Cr / 5 + Mo / 4 (1)
(In the formula, C, Mn, Si, Ni, Cr, and Mo indicate the amount of each element added (% by mass)), the wire or powder satisfies 0.3 ≦ Ceq ≦ 0.9. Having a composition
The coating hardness is in the range of HV300-500,
An iron-based thermal spray coating comprising pores and having a porosity per cross-sectional area of 2.1% or less .
プラズマ溶射によって、上記線材又は粉末の溶滴を上記アルミ合金製母材の表面に噴射することを特徴とする鉄系溶射被膜の製造方法。 In forming the iron-based thermal spray coating according to claim 1 or 2 ,
A method for producing an iron-based thermal sprayed coating, comprising spraying droplets of the wire or powder onto the surface of the aluminum alloy base material by plasma spraying.
上記鉄系溶射被膜が、請求項１又は２に記載の鉄系溶射被膜から成ることを特徴とする摺動部材。 In a sliding member comprising an aluminum alloy base material and an iron-based thermal spray coating formed on the surface thereof,
3. A sliding member, wherein the iron-based sprayed coating comprises the iron-based sprayed coating according to claim 1 or 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008135411A JP5257756B2 (en) | 2007-12-05 | 2008-05-23 | Iron-based thermal spray coating, method for forming the same, and sliding member |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007314465 | 2007-12-05 | ||
| JP2007314465 | 2007-12-05 | ||
| JP2008135411A JP5257756B2 (en) | 2007-12-05 | 2008-05-23 | Iron-based thermal spray coating, method for forming the same, and sliding member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2009155720A JP2009155720A (en) | 2009-07-16 |
| JP5257756B2 true JP5257756B2 (en) | 2013-08-07 |
Family
ID=40960031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008135411A Active JP5257756B2 (en) | 2007-12-05 | 2008-05-23 | Iron-based thermal spray coating, method for forming the same, and sliding member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5257756B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3404403A1 (en) * | 2017-05-18 | 2018-11-21 | Grob-Werke GmbH & Co. KG | Method and device for testing the quality of coated surfaces |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5840485B2 (en) * | 2011-12-28 | 2016-01-06 | 本田技研工業株式会社 | Piston for internal combustion engine |
| JP5525507B2 (en) * | 2011-11-29 | 2014-06-18 | Ｔｐｒ株式会社 | Valve seat |
| EP3428306B1 (en) * | 2013-07-09 | 2020-09-16 | Nissan Motor Co., Ltd. | Cylinder block for internal combustion engine and sliding mechanism for internal combustion engine |
| JP5804012B2 (en) | 2013-09-24 | 2015-11-04 | トヨタ自動車株式会社 | Method for forming iron-based spray coating and iron-based spray coating coating member |
| DE102016205199A1 (en) | 2016-03-30 | 2017-10-05 | Federal-Mogul Nürnberg GmbH | Coating for the coating of engine pistons |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5839226B2 (en) * | 1976-09-13 | 1983-08-29 | トヨタ自動車株式会社 | Surface treatment method for light alloy cylinders |
| JPS547013A (en) * | 1977-06-17 | 1979-01-19 | Honda Motor Co Ltd | Internal combustion engine cylinder |
| JPH0726186B2 (en) * | 1987-10-24 | 1995-03-22 | トヨタ自動車株式会社 | Method for improving wear resistance of Fe-C based sprayed layer |
| JP2740074B2 (en) * | 1992-06-03 | 1998-04-15 | 株式会社クボタ | High tensile strength column material |
| DE59914394D1 (en) * | 1999-01-19 | 2007-08-09 | Sulzer Metco Ag | Plasma spraying layer for cylinder surfaces of engine blocks and method of making same |
| JP4199500B2 (en) * | 2002-09-12 | 2008-12-17 | トヨタ自動車株式会社 | Cylinder block |
| JP2004244709A (en) * | 2003-02-17 | 2004-09-02 | Toyota Motor Corp | Thermal spraying material, cylinder, and method for depositing spray deposit film |
| JP4984214B2 (en) * | 2006-05-11 | 2012-07-25 | 日産自動車株式会社 | Iron-based sprayed thin film for cylinder block and cylinder block |
-
2008
- 2008-05-23 JP JP2008135411A patent/JP5257756B2/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3404403A1 (en) * | 2017-05-18 | 2018-11-21 | Grob-Werke GmbH & Co. KG | Method and device for testing the quality of coated surfaces |
| US10677590B2 (en) | 2017-05-18 | 2020-06-09 | Grob-Werke Gmbh & Co. Kg | Method and device for assessing the quality of coated surfaces |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009155720A (en) | 2009-07-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6112203B2 (en) | Iron-based thermal spray coating, cylinder block for internal combustion engine using the same, and sliding mechanism for internal combustion engine | |
| JP5257756B2 (en) | Iron-based thermal spray coating, method for forming the same, and sliding member | |
| US9194492B2 (en) | Piston ring having a thermally sprayed coating and method for producing same | |
| JP5903085B2 (en) | Combination of cylinder bore and piston ring | |
| KR100501985B1 (en) | An abrasion-resistant thermal-sprayed coating for a sliding member | |
| EP3315624B1 (en) | Cylindrical member made from lamellar graphite cast iron | |
| JP5514187B2 (en) | piston ring | |
| JP4984214B2 (en) | Iron-based sprayed thin film for cylinder block and cylinder block | |
| JP5455149B2 (en) | Iron-based thermal spray coating | |
| JP6259827B2 (en) | Abrasion resistant coating for piston rings | |
| JP2003013163A (en) | Sliding member made from powder aluminum alloy, and combination of cylinder and piston ring | |
| KR101915593B1 (en) | Piston ring and manufacturing method thereof | |
| US20170130307A1 (en) | Alloy composition for thermal spray application | |
| CN112055794B (en) | Piston ring | |
| JP2003343353A (en) | Cylinder and piston-ring combination of internal combustion engine | |
| Hwang et al. | Tribological behavior of plasma spray coatings for marine diesel engine piston ring and cylinder liner | |
| JP4281368B2 (en) | Abrasion resistant spray coating | |
| JP4282894B2 (en) | piston ring | |
| JP3547583B2 (en) | Cylinder liner | |
| JP5871152B2 (en) | Thermal spray material, thermal spray coating and structure | |
| KR20230162694A (en) | Thermal spray coating, sliding members and piston rings | |
| JP2003148242A (en) | Piston ring and combination of piston ring and ring channel | |
| JP2007177760A (en) | Piston, piston ring and cylinder block for internal combustion engine | |
| EP3875630A1 (en) | Thermally sprayed coating for sliding member and sliding device provided with said thermally sprayed coating for sliding member | |
| EP3875631A1 (en) | Thermal spray coating for sliding member, and sliding device provided with thermal spray coating for sliding member |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20110425 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20110902 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130107 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20130305 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20130329 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20130411 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20160502 Year of fee payment: 3 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 5257756 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |