JP2002173757A - Coated member for electrical equipment - Google Patents
Coated member for electrical equipmentInfo
- Publication number
- JP2002173757A JP2002173757A JP2000367233A JP2000367233A JP2002173757A JP 2002173757 A JP2002173757 A JP 2002173757A JP 2000367233 A JP2000367233 A JP 2000367233A JP 2000367233 A JP2000367233 A JP 2000367233A JP 2002173757 A JP2002173757 A JP 2002173757A
- Authority
- JP
- Japan
- Prior art keywords
- sprayed film
- coating
- coating member
- thermal
- base material
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電力機器の部材の
一部に高融点の溶射膜をコーティングした電気機器用コ
ーティング部材に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating member for electric equipment in which a part of a member of a power equipment is coated with a high-melting sprayed film.
【０００２】[0002]
【従来の技術】一般に、環境調和が重視される近年、電
力機器においては機器の小型縮小化が要求されている。
電力機器を小型縮小化する場合、接点部の小型縮小化は
必須であるが、これに伴って接点部における電流密度が
高まることになる。接点部周辺における通電部材には高
導電率材料であるアルミやアルミ合金、または銅や銅合
金が多く使用されている。これらアルミや銅は融点が低
いため、接点部における電流密度が高いと、接点開閉時
に発生するアーク熱が増大し、これにより溶損するおそ
れがある。通電部材の溶損は部材自体の機械的強度の低
下を招くだけではなく、溶損により発生する金属蒸気に
よって絶縁抵抗が低下するといった問題を引き起こして
しまう。つまり、部材の溶損が機器の小型縮小化を制限
することになる。2. Description of the Related Art In general, in recent years, where importance is placed on environmental harmony, there is a demand for miniaturization of power equipment.
When downsizing a power device, it is essential to reduce the size of the contact portion, but this leads to an increase in current density at the contact portion. Aluminum or an aluminum alloy, or copper or a copper alloy, which is a high conductivity material, is often used as a current-carrying member in the vicinity of the contact portion. Since aluminum and copper have low melting points, if the current density in the contact portion is high, the arc heat generated at the time of opening and closing the contact increases, which may cause melting. Melting of the current-carrying member not only causes a decrease in mechanical strength of the member itself, but also causes a problem that metal vapor generated by the melting reduces insulation resistance. That is, the erosion of the members limits the miniaturization of the device.
【０００３】このような電力機器部材の溶損を防ぐ手段
としては部材の耐熱性を高めることが有効である。そこ
で従来より、電力機器部材を基材としてその一部に高融
点な異種金属からなる溶射膜をコーティングした電気機
器用コーティング部材が提案されており、様々な技術が
開発されている。例えば、特開平１１―１５２５８４号
公報では、溶射膜の端部形状を制御することによってコ
ーティング部材の信頼性を高める技術が示されている。As a means for preventing such power equipment members from being damaged by melting, it is effective to increase the heat resistance of the members. In view of the above, conventionally, there have been proposed coating members for electric equipment in which a part of a power equipment member is coated with a thermal spray coating made of a different metal having a high melting point, and various techniques have been developed. For example, Japanese Patent Application Laid-Open No. H11-152584 discloses a technique for improving the reliability of a coating member by controlling the end shape of a sprayed film.
【０００４】[0004]
【発明が解決しようとする課題】ところで現在、電力需
要は増大する傾向にあり、機器の競争力に関しても常に
強化が求められている。このため、電気機器用コーティ
ング部材は過酷な使用環境にさらされる場合が多い。し
たがって、電気機器用コーティング部材に対する信頼性
をいっそう向上させることが期待されている。また、電
力機器用コーティング部材においては、競争力強化のた
めの機器の小型縮小化を目的としている。したがって、
部材の製造コストそのものを安価とすることが非常に重
要になっている。At present, the demand for electric power tends to increase, and the competitiveness of the equipment is constantly required to be strengthened. For this reason, the coating member for electric devices is often exposed to a severe use environment. Therefore, it is expected that the reliability of the coating member for electric equipment is further improved. In addition, with respect to coating members for power equipment, the aim is to reduce the size of the equipment in order to enhance competitiveness. Therefore,
It is very important to reduce the manufacturing costs of the members themselves.
【０００５】本発明は、このような状況に鑑みて提案さ
れたものであり、その目的は、優れた耐熱性を持ち高い
信頼性を発揮する電力機器用コーティング部材を提供す
ることにある。また、本発明の他の目的は、製造コスト
を低減した安価な電力機器用コーティング部材を提供す
ることにある。The present invention has been made in view of such circumstances, and an object of the present invention is to provide a coating member for power equipment which has excellent heat resistance and exhibits high reliability. Another object of the present invention is to provide an inexpensive coating device for power equipment in which the manufacturing cost is reduced.
【０００６】[0006]
【課題を解決するための手段】以上の目的を達成するた
めに、本発明は、アルミニウム、アルミニウム合金、
銅、または銅合金からなる電気機器の部材を基材とし、
その一部に該基材の構成材料よりも高融点な異種金属か
らなる溶射膜をコーティングした電気機器用コーティン
グ部材において、次のような技術的な特徴を有してい
る。In order to achieve the above object, the present invention provides an aluminum, aluminum alloy,
Copper, or a member of an electrical device made of a copper alloy as a base material,
A coating member for electric equipment in which a part thereof is coated with a sprayed film made of a dissimilar metal having a higher melting point than the constituent material of the base material has the following technical features.
【０００７】請求項１の発明では、前記溶射膜中の気孔
率を１０％以下としたことを特徴としている。請求項２
の発明では、請求項１記載の電気機器用コーティング部
材において、１０００℃の熱処理を施した際の前記溶射
膜の収縮率を１％以下としたことを特徴としている。請
求項３の発明では、請求項１または２記載の電気機器用
コーティング部材において、前記基材に凹部を形成し、
その凹部内に前記溶射膜をコーティングしたことを特徴
としている。請求項４の発明では、請求項３記載の電気
機器用コーティング部材において、前記凹部の底面に段
差をつける溝を形成したことを特徴としている。請求項
５の発明では、請求項１、２、３または４記載の電気機
器用コーティング部材において、前記溶射膜に対し溶射
後に熱処理を施すことより前記溶射膜中に１００ＭＰａ
以上の圧縮残留応力を作用させるように構成したことを
特徴としている。以上のような構成を有する請求項１〜
５の発明によれば、優れた耐熱性を発揮でき、過酷な使
用環境にあっても信頼性が向上する。[0007] The invention of claim 1 is characterized in that the porosity in the sprayed film is set to 10% or less. Claim 2
According to the invention, in the coating member for an electric device according to the first aspect, a contraction rate of the sprayed film when subjected to a heat treatment at 1000 ° C. is set to 1% or less. According to a third aspect of the present invention, in the coating member for an electric device according to the first or second aspect, a concave portion is formed in the base material,
The thermal spray coating is coated in the recess. According to a fourth aspect of the present invention, in the coating member for an electric device according to the third aspect, a groove for forming a step is formed on a bottom surface of the concave portion. According to a fifth aspect of the present invention, in the coating member for an electric device according to the first, second, third, or fourth aspect, the thermal sprayed film is subjected to a heat treatment after thermal spraying, so that the thermal sprayed film has a pressure of 100 MPa.
It is characterized in that it is configured to apply the above-mentioned compressive residual stress. Claims 1 having the above configuration
According to the fifth aspect, excellent heat resistance can be exhibited, and reliability is improved even in a severe use environment.
【０００８】請求項６の発明では、請求項１、２、３ま
たは４記載の電気機器用コーティング部材において、冷
却過程での相変態膨脹により前記溶射膜中に１００ＭＰ
ａ以上の圧縮残留応力を作用させるように構成したこと
を特徴としている。以上の請求項６の発明によれば、冷
却過程での相変態膨脹を利用して溶射膜中に圧縮残留応
力を作用させているので、溶射後の熱処理が不要とな
り、コストの削減も実現することができる。According to a sixth aspect of the present invention, in the coating member for electrical equipment according to the first, second, third or fourth aspect, 100 MPa is contained in the sprayed film by phase transformation expansion during a cooling process.
It is characterized in that it is configured to apply a compressive residual stress of a or more. According to the sixth aspect of the present invention, since compressive residual stress is applied to the sprayed film by utilizing phase transformation expansion in the cooling process, heat treatment after thermal spraying becomes unnecessary, and cost reduction is realized. be able to.
【０００９】請求項７の発明では、請求項１、２、３、
４、５または６記載の電気機器用コーティング部材にお
いて、前記溶射膜の膜厚を０．２〜１０ｍｍとしたこと
を特徴としている。以上の請求項７の発明によれば、溶
射膜の膜厚を０．２ｍｍ以上にして優れた耐熱性を確保
すると同時に、溶射膜の膜厚を１０ｍｍ以下に設定する
ことでコーティング施工時間を短縮でき、製造コストを
低減させることができる。According to the invention of claim 7, in claims 1, 2, 3,
7. The coating member for electrical equipment according to 4, 5, or 6, wherein the sprayed film has a thickness of 0.2 to 10 mm. According to the invention of claim 7 above, the thickness of the sprayed film is set to 0.2 mm or more to ensure excellent heat resistance, and at the same time, the coating time is shortened by setting the thickness of the sprayed film to 10 mm or less. As a result, manufacturing costs can be reduced.
【００１０】請求項８の発明では、請求項１、２、３、
４、５、６または７記載の電気機器用コーティング部材
において、ガス溶射またはプラズマ溶射を用いて前記溶
射膜をコーティングしたことを特徴としている。請求項
９の発明では、請求項１、２、３、４、５、６、７また
は８記載の電気機器用コーティング部材において、前記
溶射膜の端部における前記基材との自由縁をなす角度
を、１１０度以上または２５〜８５度としたことを特徴
としている。以上のような構成を有する請求項８及び９
の発明によれば、溶射プロセス及び基材との自由縁をな
す角度を上記の記載に限定することで、基材と溶射膜と
の界面での剥離が生じ難くなり、高信頼性を有するコー
ティング部材を得ることができる。[0010] In the invention according to claim 8, claims 1, 2, 3,
The coating member for electric equipment according to 4, 5, 6, or 7, wherein the sprayed film is coated by gas spraying or plasma spraying. According to a ninth aspect of the present invention, in the coating member for an electric device according to the first, second, third, fourth, fifth, sixth, seventh, or eighth aspect, an angle between a free edge of the end portion of the thermal sprayed film and the base material. Is set to 110 degrees or more or 25 to 85 degrees. 10 and 9 having the above configuration.
According to the invention of the above, by limiting the angle forming the free edge with the thermal spraying process and the substrate to the above description, peeling at the interface between the substrate and the thermal sprayed film is less likely to occur, and the coating having high reliability A member can be obtained.
【００１１】[0011]
【発明の実施の形態】以下に、本発明の実施の形態の一
例について図面を参照して具体的に説明する。 （１）第１の実施の形態 ［構成］第１の実施の形態は請求項１、２の発明に対応
しており、図１に示すようにＡ６０６１材を基材１とし
て、その一部に基材１の構成材料よりも高融点なステン
レス鋼からなる溶射膜２をコーティングしている。第１
の実施の形態における構成上の特徴は、溶射膜２中の気
孔率を１０％以下とし、１０００℃の熱処理を施した際
の溶射膜２の収縮率を１％以下とした点にある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. (1) First Embodiment [Structure] The first embodiment corresponds to the first and second aspects of the present invention. As shown in FIG. The thermal spray coating 2 made of stainless steel having a higher melting point than the constituent material of the substrate 1 is coated. First
The feature of the configuration in the embodiment is that the porosity in the sprayed film 2 is set to 10% or less, and the contraction rate of the sprayed film 2 when the heat treatment at 1000 ° C. is performed is set to 1% or less.
【００１２】［作用効果］第１の実施の形態における作
用効果について説明する。まず、溶射条件を種々変化さ
せることにより、溶射膜２中の気孔率を変化させてコー
ティング部材を作製した。これらのコーティング部材に
ついて、５００℃までの温度上昇、下降を繰り返す熱サ
イクル試験を実施し、溶射膜２が基材１から剥離するま
での回数を評価した。図２のグラフは溶射膜２中の気孔
率と剥離した熱サイクル回数の関係を示している。ここ
で、気孔率は溶射膜２のみから切り出した試験片の気孔
率を水銀圧入法で測定した値である。[Operation and Effect] The operation and effect of the first embodiment will be described. First, by changing the spraying conditions variously, the porosity in the sprayed film 2 was changed to produce a coating member. These coating members were subjected to a thermal cycle test in which the temperature was repeatedly increased and decreased to 500 ° C., and the number of times the thermal sprayed film 2 was peeled off from the substrate 1 was evaluated. The graph of FIG. 2 shows the relationship between the porosity in the sprayed film 2 and the number of times of peeled thermal cycles. Here, the porosity is a value obtained by measuring the porosity of a test piece cut out only from the sprayed film 2 by a mercury intrusion method.
【００１３】更に、種々の溶射条件にて作製した溶射膜
２の焼結収縮率を調査する実験を行った。ここでは溶射
膜２のみから切り出した試験片を押し棒式の熱膨張試験
を行った。この試験では不活性雰囲気中で１０００℃ま
での温度上昇の前後における溶射膜２の収縮率を測定し
た。その結果、溶射膜の収縮率は０．１〜１．５％であ
った。次にこれらの収縮率の異なる溶射膜２をコーティ
ングしたコーティング部材を作製し、前記の熱サイクル
試験を実施した。Further, an experiment was conducted to investigate the sintering shrinkage of the thermal sprayed film 2 produced under various thermal spraying conditions. Here, a test piece cut out only from the sprayed film 2 was subjected to a push-bar type thermal expansion test. In this test, the shrinkage rate of the sprayed film 2 before and after the temperature was increased to 1000 ° C. in an inert atmosphere was measured. As a result, the contraction rate of the sprayed film was 0.1 to 1.5%. Next, coating members coated with the sprayed films 2 having different shrinkage ratios were prepared, and the above-described thermal cycle test was performed.
【００１４】図２に示した試験結果から明らかなよう
に、溶射膜２中の気孔率を１０％以下に抑制することに
より、耐熱サイクル性が優れている、つまり温度変化に
対して基材１と溶射膜２の密着強度が低下しないことが
わかる。反対に溶射膜２中の気孔率が大きいと、熱サイ
クル時に溶射膜２の焼結収縮が起こり易く、基材１と溶
射膜２との密着強度の低下を招くことになる。As is clear from the test results shown in FIG. 2, by suppressing the porosity in the sprayed film 2 to 10% or less, the heat cycle resistance is excellent, that is, the base material 1 is resistant to temperature changes. It can be seen that the adhesion strength of the thermal sprayed film 2 does not decrease. Conversely, if the porosity in the thermal spray film 2 is large, the thermal spraying tends to cause sintering shrinkage of the thermal spray film 2, resulting in a decrease in the adhesion strength between the base material 1 and the thermal spray film 2.
【００１５】すなわち、第１の実施の形態においては、
溶射膜２中の気孔率を１０％以下に抑制することによ
り、優れた耐熱性を発揮できる。また、図３に示した試
験結果から明らかなように、溶射膜２の収縮率を１％以
下にすることによって、高い耐熱サイクル性の確保が可
能であることがわかる。このような第１の実施の形態に
よれば、過酷な使用環境下でも信頼性の高い電気機器用
コーティング部材を提供することができる。That is, in the first embodiment,
By suppressing the porosity in the thermal spray coating 2 to 10% or less, excellent heat resistance can be exhibited. In addition, as is clear from the test results shown in FIG. 3, it is understood that a high heat cycle resistance can be ensured by setting the contraction rate of the thermal sprayed film 2 to 1% or less. According to such a first embodiment, a highly reliable coating member for electric equipment can be provided even under a severe use environment.
【００１６】（２）第２の実施の形態 ［構成］第２の実施の形態は請求項３の発明に対応して
いる。第２の実施の形態では図４に示すように、基材１
に凹部３を形成し、その凹部３内に溶射膜２をコーティ
ングしたことを特徴としている。(2) Second Embodiment [Configuration] The second embodiment corresponds to the third aspect of the present invention. In the second embodiment, as shown in FIG.
A concave portion 3 is formed in the concave portion 3, and the thermal spray film 2 is coated in the concave portion 3.
【００１７】［作用効果］ここで、前記第１の実施の形
態に係るコーティング部材と第２の実施の形態に係る図
４のコーティング部材に関して、同一の条件下で前記の
熱サイクル試験を実施した。その結果、第１の実施の形
態は１１回で剥離が生じたところ、第２の実施の形態で
は２０回で剥離が生じた。すなわち、基材１の凹部３内
に溶射膜２を形成した第２の実施の形態によれば、耐熱
サイクル性がいっそう高くなり、より優れた信頼性を発
揮できる。[Operation and Effect] Here, the thermal cycle test was carried out under the same conditions with respect to the coating member according to the first embodiment and the coating member of FIG. 4 according to the second embodiment. . As a result, in the first embodiment, peeling occurred 11 times, whereas in the second embodiment, peeling occurred 20 times. That is, according to the second embodiment in which the thermal spray film 2 is formed in the concave portion 3 of the base material 1, the heat cycle resistance is further improved, and more excellent reliability can be exhibited.
【００１８】（３）第３の実施の形態 ［構成］第３の実施の形態は請求項５の発明に対応して
おり、溶射膜２に対し溶射後に熱処理を施すことより溶
射膜２中に１００ＭＰａ以上の圧縮残留応力を作用させ
るように構成したことを特徴としている。(3) Third Embodiment [Structure] The third embodiment corresponds to the invention of claim 5, and heat treatment is performed on the thermal sprayed film 2 after thermal spraying, so that the thermal sprayed film 2 has It is characterized in that it is configured to apply a compressive residual stress of 100 MPa or more.
【００１９】［作用効果］このような第３の実施の形態
における作用効果は次の通りである。すなわち、溶射膜
２の溶射後に熱処理を行い、その熱処理条件を変えるこ
とにより、溶射膜２中に作用する残留応力を変化させた
コーティング部材を作製し、前記熱サイクル試験を実施
した。図５は溶射膜２中の残留応力と耐熱サイクル回数
を示している。ここで、残留応力は溶射膜表面をエック
ス線法で測定した値であり、正の値は引張残留応力を表
し、負の値は圧縮残留応力を表している。[Functions and Effects] The functions and effects of the third embodiment are as follows. That is, a heat treatment was performed after thermal spraying of the thermal sprayed film 2, and a coating member in which the residual stress acting in the thermal sprayed film 2 was changed by changing the heat treatment conditions was manufactured, and the thermal cycle test was performed. FIG. 5 shows the residual stress in the thermal spray coating 2 and the number of heat-resistant cycles. Here, the residual stress is a value obtained by measuring the sprayed film surface by the X-ray method, and a positive value indicates a tensile residual stress, and a negative value indicates a compressive residual stress.
【００２０】図５から明らかなように、溶射膜２中に作
用する残留応力が−１００ＭＰａ以下、つまり、圧縮残
留応力が１００ＭＰａ以上の場合に耐熱サイクル性に優
れていることがわかる。したがって、溶射膜２中に１０
０ＭＰａ以上の圧縮残留応力を作用させた第３の実施の
形態によれば、優れた耐熱性を発揮でき、信頼性の高い
電気機器用コーティング部材を提供することができる。As apparent from FIG. 5, when the residual stress acting on the thermal sprayed film 2 is -100 MPa or less, that is, when the compressive residual stress is 100 MPa or more, the heat cycle resistance is excellent. Therefore, 10
According to the third embodiment in which a compressive residual stress of 0 MPa or more is applied, excellent heat resistance can be exhibited, and a highly reliable coating member for electric equipment can be provided.
【００２１】（４）第４の実施の形態 ［構成］第４の実施の形態は請求項６の発明に対応して
おり、冷却過程での相変態膨脹により溶射膜２中に１０
０ＭＰａ以上の圧縮残留応力を作用させるように構成し
たことを特徴としている。(4) Fourth Embodiment [Structure] The fourth embodiment corresponds to the sixth aspect of the present invention. In the fourth embodiment, 10% is formed in the sprayed film 2 by phase transformation expansion in a cooling process.
It is characterized in that it is configured to apply a compressive residual stress of 0 MPa or more.
【００２２】［作用効果］種々の組成の異なる鋼材につ
いて溶射膜２を作製し、エックス線法により溶射膜中の
残留応力を測定した。その結果、相変態膨張がおこる組
成のステンレス鋼の場合、熱処理を施さなくても、溶射
膜２中に圧縮残留応力を作用させることができることが
明らかとなった。つまり、溶射プロセスにおいて、溶射
膜２には冷却過程で相変態膨張が起こるため、冷却収縮
よりも大きく膨張し、圧縮残留応力が生じることにな
る。したがって、第４の実施の形態では、この相変態膨
脹を利用して溶射膜２中に１００ＭＰａ以上の圧縮残留
応力を作用させている。これにより、上記第３の実施の
形態が持つ作用効果に加えて、熱処理を施す必要が無
く、製造コストの低減を図ることができる。この結果、
極めて安価な電気機器用コーティング部材を提供するこ
とが可能となり、経済的に有利となる。[Effects] Thermal sprayed films 2 were prepared from various steel materials having different compositions, and the residual stress in the sprayed films was measured by the X-ray method. As a result, it has been clarified that, in the case of stainless steel having a composition in which phase transformation expansion occurs, a compressive residual stress can be applied to the sprayed film 2 without performing heat treatment. That is, in the thermal spraying process, the thermal spray film 2 undergoes a phase transformation expansion during the cooling process, so that the thermal spray film 2 expands more than the cooling shrinkage, thereby generating a compressive residual stress. Therefore, in the fourth embodiment, a compressive residual stress of 100 MPa or more acts on the sprayed film 2 by utilizing the phase transformation expansion. Accordingly, in addition to the operation and effect of the third embodiment, there is no need to perform a heat treatment, and the manufacturing cost can be reduced. As a result,
It is possible to provide an extremely inexpensive coating member for electric equipment, which is economically advantageous.
【００２３】（５）第５の実施の形態 ［構成］第５の実施の形態は請求項７の発明に対応して
おり、溶射膜２の膜厚を０．２〜１０ｍｍとしたことを
特徴としている。(5) Fifth Embodiment [Structure] The fifth embodiment corresponds to the invention of claim 7, and is characterized in that the thickness of the sprayed film 2 is set to 0.2 to 10 mm. And
【００２４】［作用効果］ここで、電気機器用コーティ
ング部材を溶射膜２の膜厚を０．１ｍｍから１５ｍｍに
変化させて作製した。その結果、肉厚が１０ｍｍを越え
ると、コーティング施工時間が非常に長くなるため、安
価に部材を作製することが困難であることが明らかとな
った。さらに、溶射膜２の肉厚が１０ｍｍ以下のコーテ
ィング部材について、耐熱性評価試験を行った。耐熱性
評価試験ではプラズマガンを用いて、プラズマフレーム
にコーティング部を曝した後の溶射膜２の損耗状態によ
り、評価した。その結果、溶射膜２の肉厚が０．２ｍｍ
より薄いコーティング部材では溶損が基材１にまで及ん
でいた。以上のことから、溶射膜２の膜厚を０．２〜１
０ｍｍと限定した第５の実施の形態においては、膜厚を
０．２ｍｍ以上することで優れた耐熱性を確保すると同
時に、膜厚を１０ｍｍ以下に設定することでコーティン
グ施工時間の短縮化を図って製造コストを低減させるこ
とが可能である。[Effects] Here, a coating member for electric equipment was manufactured by changing the thickness of the sprayed film 2 from 0.1 mm to 15 mm. As a result, if the thickness exceeds 10 mm, it becomes clear that it is difficult to produce a member at low cost because the coating time is extremely long. Further, a heat resistance evaluation test was performed on a coating member having a thickness of the thermal sprayed film 2 of 10 mm or less. In the heat resistance evaluation test, a plasma gun was used to evaluate the state of wear of the sprayed film 2 after exposing the coating portion to the plasma frame. As a result, the thickness of the thermal spray coating 2 was 0.2 mm.
In the case of a thinner coating member, the erosion extended to the substrate 1. From the above, the thickness of the sprayed film 2 is set to 0.2 to 1
In the fifth embodiment limited to 0 mm, the coating thickness is set to 0.2 mm or more to ensure excellent heat resistance, and at the same time, the coating thickness is set to 10 mm or less to shorten the coating time. Thus, the manufacturing cost can be reduced.
【００２５】（６）第６の実施の形態 ［構成］第６の実施の形態は請求項８の発明に対応して
おり、その特徴は、ガス溶射またはプラズマ溶射を用い
て溶射膜２をコーティングしている点にある。(6) Sixth Embodiment [Structure] The sixth embodiment corresponds to the eighth aspect of the present invention, and the feature of the sixth embodiment is that the thermal spray film 2 is coated by using gas spraying or plasma spraying. Is that
【００２６】［作用効果］第６の実施の形態における作
用効果について説明する。まず、溶射プロセスとしてガ
ス溶射、プラズマ溶射、アーク溶射の３プロセスを用い
てコーティング部材を作製し、これについて前記熱サイ
クル試験を実施した。その結果、基材１と溶射膜２の剥
離が生じた回数は、ガス溶射が３０回、プラズマ溶射が
３５回、アーク溶射が１６回であった。これは、アーク
溶射の場合には溶射膜２の成膜速度は極めて速く、しか
も溶射噴霧粒子が大きいので溶射膜２中の気孔率が高く
なる。そのため、基材１と溶射膜２との間に十分な密着
力が得られず、基材１と溶射膜２の界面での剥離が起き
易いと考えられる。これに対して、溶射プロセスをガス
溶射またはプラズマ溶射にした第６の実施の形態では、
溶射膜２の成膜速度は比較的遅く、溶射膜２中の気孔率
も抑制できる。そのため、基材１と溶射膜２との間に十
分な密着力を得ることが可能であり、基材１と溶射膜２
の界面での剥離が生じ難くなる。この結果、信頼性の高
い電気機器用コーティング部材を獲得することができ
る。[Function and Effect] The function and effect of the sixth embodiment will be described. First, a coating member was prepared using three processes of gas spraying, plasma spraying, and arc spraying as the spraying process, and the thermal cycle test was performed on the coating member. As a result, the number of times that the substrate 1 and the sprayed film 2 were separated was 30 times for gas spraying, 35 times for plasma spraying, and 16 times for arc spraying. This is because, in the case of arc spraying, the deposition rate of the sprayed film 2 is extremely high, and the porosity in the sprayed film 2 is increased because the sprayed spray particles are large. Therefore, it is considered that sufficient adhesion between the base material 1 and the sprayed film 2 cannot be obtained, and separation at the interface between the base material 1 and the sprayed film 2 is likely to occur. On the other hand, in the sixth embodiment in which the thermal spraying process is gas thermal spraying or plasma thermal spraying,
The deposition rate of the thermal spray film 2 is relatively slow, and the porosity in the thermal spray film 2 can be suppressed. Therefore, it is possible to obtain a sufficient adhesion between the base material 1 and the sprayed film 2, and the base material 1 and the sprayed film 2
Is less likely to occur at the interface. As a result, a highly reliable coating member for electric equipment can be obtained.
【００２７】（７）第７の実施の形態 ［構成］第７の実施の形態は請求項９の発明に対応して
おり、溶射膜２の端部における基材１との自由縁をなす
角度、つまり開先角度を、１１０度以上または２５〜８
５度としたことを特徴とするものである。(7) Seventh Embodiment [Structure] The seventh embodiment corresponds to the ninth aspect of the present invention, in which the angle between the edge of the sprayed film 2 and the free edge with the substrate 1 is formed. In other words, the included angle is 110 degrees or more or 25 to 8
The angle is set to 5 degrees.
【００２８】［作用効果］第７の実施の形態における作
用効果について説明する。まず、電気機器用コーティン
グ部材に関して溶射膜２の開先角度を変化させてコーテ
ィング部材を作製した。このように作製した種々の試験
体に関し、前記熱サイクル試験を評価した。図６には開
先角度と耐熱サイクル回数の関係を示している。この図
６に示した試験結果から明らかなように、溶射膜２の開
先角度を２５〜８５度、または１１０度以上にした第７
の実施の形態によれば、基材１と溶射膜２の剥離が生じ
難くなり、信頼性を高めることができる。[Operation and Effect] The operation and effect of the seventh embodiment will be described. First, a coating member was produced by changing the included angle of the sprayed film 2 with respect to the coating member for electric equipment. The heat cycle test was evaluated for the various test pieces prepared as described above. FIG. 6 shows the relationship between the groove angle and the number of heat-resistant cycles. As is apparent from the test results shown in FIG. 6, the groove angle of the thermal sprayed film 2 is 25 to 85 degrees, or the seventh angle is set to 110 degrees or more.
According to the embodiment, peeling of the base material 1 and the sprayed film 2 hardly occurs, and reliability can be improved.
【００２９】（８）他の実施の形態 なお、本発明は以上の実施の形態に限定されるものでは
なく、例えば、図７に示す実施の形態は請求項４の発明
に対応しており、図４に示した第２の実施の形態の改良
例である。この実施の形態では前記凹部３の底面に段差
をつける溝４を形成したことを特徴としている。ここ
で、前記第２の実施の形態に係る図４のコーティング部
材と、図７のコーティング部材に関して、同一の条件下
で前記の熱サイクル試験を実施した。その結果、溝加工
を施していない第２の実施の形態のコーティング部材は
熱サイクル２０回で剥離が生じたのに対し、溝４の加工
を施した図７のコーティング部材は３０回まで剥離が生
じなかった。すなわち、基材１の凹部３内に溝４を施す
ことにより、基材１と溶射膜２との密着力がいっそう向
上し、信頼性をより高めることができる。(8) Other Embodiments The present invention is not limited to the above embodiments. For example, the embodiment shown in FIG. 7 corresponds to the invention of claim 4, This is an improved example of the second embodiment shown in FIG. This embodiment is characterized in that a groove 4 for providing a step is formed on the bottom surface of the concave portion 3. Here, the thermal cycle test was performed on the coating member of FIG. 4 according to the second embodiment and the coating member of FIG. 7 under the same conditions. As a result, the coating member of the second embodiment in which the groove was not formed was peeled off by 20 heat cycles, whereas the coating member of FIG. 7 in which the groove 4 was formed was peeled up to 30 times. Did not occur. That is, by providing the groove 4 in the concave portion 3 of the base material 1, the adhesion between the base material 1 and the sprayed film 2 is further improved, and the reliability can be further improved.
【００３０】また、溶射膜２の材料としてはステンレス
鋼に限らず、モリブデン、タングステンをはじめとし
て、１３Ｃｒステンレス鋼や炭素鋼などの鋼材系材料、
さらには銅、鉄、クロム、コバルト、ニッケルおよびそ
の合金であっても良い。特に、１３Ｃｒステンレス鋼か
らなる溶射膜は基材との界面で剥離が生じ難く、コーテ
ィング部材として好適である。さらに、基材の材料とし
ては、前記Ａ６０６１材以外にも、その他のアルミやア
ルミ合金、または銅や銅合金を基材としても良い。The material of the sprayed film 2 is not limited to stainless steel, but may be molybdenum, tungsten, or other steel-based material such as 13Cr stainless steel or carbon steel.
Further, copper, iron, chromium, cobalt, nickel and alloys thereof may be used. In particular, a sprayed film made of 13Cr stainless steel hardly peels off at the interface with the base material, and is suitable as a coating member. Further, as a material of the base material, other than the A6061 material, other aluminum or aluminum alloy, or copper or copper alloy may be used as the base material.
【００３１】[0031]
【発明の効果】以上説明したように、本発明によれば、
溶射膜中の気孔率を１０％以下とするといった極めて簡
単な構成により、優れた耐熱性を持ち高い信頼性を発揮
する電力機器用コーティング部材を提供することができ
る。As described above, according to the present invention,
With a very simple structure such that the porosity in the sprayed film is 10% or less, it is possible to provide a coating member for power equipment having excellent heat resistance and exhibiting high reliability.
【図１】本発明に係る第１の実施の形態の模式図。FIG. 1 is a schematic diagram of a first embodiment according to the present invention.
【図２】溶射膜中の気孔率と耐熱サイクル回数の関係
図。FIG. 2 is a diagram showing the relationship between the porosity in a sprayed film and the number of heat-resistant cycles.
【図３】溶射膜の収縮率と耐熱サイクル回数の関係図。FIG. 3 is a graph showing the relationship between the contraction rate of a sprayed film and the number of heat-resistant cycles.
【図４】本発明に係る第２の実施の形態の模式図。FIG. 4 is a schematic view of a second embodiment according to the present invention.
【図５】溶射膜の残留応力と耐熱サイクル回数の関係
図。FIG. 5 is a diagram showing the relationship between the residual stress of a sprayed film and the number of heat-resistant cycles.
【図６】溶射膜端部の開先角度と耐熱サイクル回数の関
係図。FIG. 6 is a diagram showing a relationship between a groove angle of a sprayed film end portion and the number of heat-resistant cycles.
【図７】本発明に係る他の実施の形態の模式図。FIG. 7 is a schematic view of another embodiment according to the present invention.
１…基材 ２…溶射膜 ３…凹部 ４…溝 DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Thermal spray film 3 ... Depression 4 ... Groove
───────────────────────────────────────────────────── フロントページの続き (72)発明者 新藤 尊彦 神奈川県川崎市川崎区浮島町２番１号 株 式会社東芝浜川崎工場内 (72)発明者 宇田川 剛 神奈川県川崎市川崎区浮島町２番１号 株 式会社東芝浜川崎工場内 (72)発明者 須山 章子 神奈川県川崎市川崎区浮島町２番１号 株 式会社東芝浜川崎工場内 Ｆターム(参考） 4K031 AA06 AB02 AB08 BA01 CB08 CB21 CB22 DA01 DA04 FA01 5G050 AA02 AA13 BA01 BA06 BA08 CA01 DA03 EA06 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takahiko Shindo 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba Hamakawasaki Plant (72) Inventor Tsuyoshi Udagawa 2 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture No. 1 Inside Toshiba Hamakawasaki Plant (72) Inventor Akiko Suyama No. 2-1 Ukishima-cho, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture F-term (reference) 4K031 AA06 AB02 AB08 BA01 CB08 CB21 CB22 DA01 DA04 FA01 5G050 AA02 AA13 BA01 BA06 BA08 CA01 DA03 EA06
Claims (9)
または銅合金からなる電気機器の部材を基材とし、その
一部に該基材の構成材料よりも高融点な異種金属からな
る溶射膜をコーティングした電気機器用コーティング部
材において、 前記溶射膜中の気孔率を１０％以下としたことを特徴と
する電気機器用コーティング部材。1. An aluminum, aluminum alloy, copper,
Or a member of an electrical device made of a copper alloy as a base material, a coating member for an electrical device in which a part thereof is coated with a sprayed film made of a dissimilar metal having a higher melting point than the constituent material of the base material, A coating member for electric equipment, wherein the porosity is 10% or less.
射膜の収縮率を１％以下としたことを特徴とする請求項
１記載の電気機器用コーティング部材。2. The coating member for electric equipment according to claim 1, wherein a shrinkage rate of said sprayed film when subjected to a heat treatment at 1000 ° C. is 1% or less.
前記溶射膜をコーティングしたことを特徴とする請求項
１または２記載の電気機器用コーティング部材。3. The coating member for an electric device according to claim 1, wherein a concave portion is formed in the base material, and the thermal spray film is coated in the concave portion.
したことを特徴とする請求項３記載の電気機器用コーテ
ィング部材。4. The coating member for an electric device according to claim 3, wherein a groove for providing a step is formed on a bottom surface of the concave portion.
ことより前記溶射膜中に１００ＭＰａ以上の圧縮残留応
力を作用させるように構成したことを特徴とする請求項
１、２、３または４記載の電気機器用コーティング部
材。5. The thermal spray coating according to claim 1, wherein a heat treatment is performed after the thermal spraying to apply a compressive residual stress of 100 MPa or more to the thermal sprayed coating. Coating material for electrical equipment.
膜中に１００ＭＰａ以上の圧縮残留応力を作用させるよ
うに構成したことを特徴とする請求項１、２、３または
４記載の電気機器用コーティング部材。6. The electrical equipment according to claim 1, wherein a compressive residual stress of 100 MPa or more is applied to the sprayed film by phase transformation expansion in a cooling process. Coating members.
したことを特徴とする請求項１、２、３、４、５または
６記載の電気機器用コーティング部材。7. The coating member for electrical equipment according to claim 1, wherein the thickness of the sprayed film is 0.2 to 10 mm.
記溶射膜をコーティングしたことを特徴とする請求項
１、２、３、４、５、６または７記載の電気機器用コー
ティング部材。8. The coating member for electrical equipment according to claim 1, wherein said sprayed film is coated by gas spraying or plasma spraying.
自由縁をなす角度を、１１０度以上または２５〜８５度
としたことを特徴とする請求項１、２、３、４、５、
６、７または８記載の電気機器用コーティング部材。9. An angle between a free edge of the sprayed film and the base at an end of the sprayed film is 110 degrees or more or 25 to 85 degrees. ,
9. The coating member for an electric device according to 6, 7, or 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000367233A JP2002173757A (en) | 2000-12-01 | 2000-12-01 | Coated member for electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000367233A JP2002173757A (en) | 2000-12-01 | 2000-12-01 | Coated member for electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002173757A true JP2002173757A (en) | 2002-06-21 |
Family
ID=18837695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000367233A Pending JP2002173757A (en) | 2000-12-01 | 2000-12-01 | Coated member for electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002173757A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016000849A (en) * | 2014-06-11 | 2016-01-07 | 日本発條株式会社 | Production method of laminate, and laminate |
-
2000
- 2000-12-01 JP JP2000367233A patent/JP2002173757A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016000849A (en) * | 2014-06-11 | 2016-01-07 | 日本発條株式会社 | Production method of laminate, and laminate |
| US10315388B2 (en) | 2014-06-11 | 2019-06-11 | Nhk Spring Co., Ltd. | Method of manufacturing laminate and laminate |
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