WO2023191053A1 - Copper alloy to be used in sliding member, casting, sliding member, and method for producing same - Google Patents
Copper alloy to be used in sliding member, casting, sliding member, and method for producing same Download PDFInfo
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- WO2023191053A1 WO2023191053A1 PCT/JP2023/013563 JP2023013563W WO2023191053A1 WO 2023191053 A1 WO2023191053 A1 WO 2023191053A1 JP 2023013563 W JP2023013563 W JP 2023013563W WO 2023191053 A1 WO2023191053 A1 WO 2023191053A1
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 55
- 238000005266 casting Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 86
- 229910052742 iron Inorganic materials 0.000 claims abstract description 43
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract description 22
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 21
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 21
- 239000011593 sulfur Substances 0.000 claims abstract description 21
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 20
- 239000011574 phosphorus Substances 0.000 claims abstract description 20
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 11
- 239000010949 copper Substances 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 239000011135 tin Substances 0.000 abstract description 18
- 229910052718 tin Inorganic materials 0.000 abstract description 18
- 238000012360 testing method Methods 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 10
- 238000011156 evaluation Methods 0.000 description 10
- 230000007547 defect Effects 0.000 description 7
- 238000009864 tensile test Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 150000003568 thioethers Chemical class 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007546 Brinell hardness test Methods 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- XVOFZWCCFLVFRR-UHFFFAOYSA-N oxochromium Chemical group [Cr]=O XVOFZWCCFLVFRR-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
Definitions
- the present invention relates to a copper alloy for sliding members that does not contain lead as a main component.
- Patent Document 1 as a copper alloy for sliding members, tin is 5.14% by mass or more and 15.54% by mass or less, sulfur is 0.42% by mass or more and 1.04% by mass or less, and iron is A copper alloy for sliding members is described that contains 0.31% by mass or more and 3.43% by mass or less of phosphorus, 0.012% by mass or more and 0.033% by mass or less, and the balance is copper and unavoidable impurities. .
- Patent Document 2 discloses a copper alloy with improved machinability, which contains tin, phosphorus, and sulfur, and the remainder is copper and unavoidable impurities.
- a wrought copper alloy material is described that contains dispersed sulfides with an average diameter of 0.1 to 10 ⁇ m in a cross section perpendicular to the longitudinal direction (cross section), and the area ratio of the sulfides is 0.1 to 10%. ing.
- the copper alloy described in Patent Document 1 has a problem in that sliding properties are insufficient when the iron content is less than the specified value.
- Patent Document 2 describes the machinability effect of a copper alloy containing tin, sulfur, and phosphorus other than iron, but does not describe the sliding property. Generally speaking, copper alloys with good machinability and suitable for cutting are not suitable for sliding applications.
- the present invention provides a copper alloy for sliding members whose main components are tin, sulfur, iron, and phosphorus, which has sliding properties equivalent to or better than the conventional technology even when iron is not contained or the iron content is small. It is an object of the present invention to provide a copper alloy for sliding members, and to provide a copper alloy for sliding members that has sliding properties and good castability.
- the copper alloy for sliding members according to the present invention contains 3.0% by mass or more and 16.0% by mass or less of tin and 0.3% by mass or more and 1.0% by mass or less of sulfur.
- the first embodiment is characterized in that it contains less than 0.3% by mass of iron, 0.04% by mass or more and 0.5% by mass or less of phosphorus, and the balance is copper and unavoidable impurities.
- the copper alloy for sliding members according to the present invention further limits the first embodiment by containing 6.0% by mass or more and 15.0% by mass or less of tin and 0.005% by mass or more and 0.3% by mass of iron.
- a second embodiment containing less than % can be selected.
- the copper alloy for a sliding member according to the present invention further limits the first embodiment by containing 9.0% by mass or more and 11.0% by mass of tin and 0.5% by mass or more and 1.0% by mass of sulfur. % or less, a third embodiment containing iron in an amount of 0.005% by mass or more and less than 0.05% by mass can be selected.
- a cast body made of a copper alloy for a sliding member according to any one of the first to third embodiments can be selected.
- a sliding member made of a cast body made of a copper alloy for sliding members according to any one of the first to third embodiments can be selected.
- the method for manufacturing a sliding member according to the present invention includes tin of 3.0% by mass or more and 16.0% by mass or less, sulfur of 0.3% by mass or more and 1.0% by mass or less, and iron less than 0.07% by mass.
- the method is characterized in that a sliding member is manufactured by melting and casting a copper alloy component containing 0.04% by mass or more and 0.5% by mass or less of phosphorus.
- an embodiment can be selected in which tin is contained in a range of 6.0% by mass to 15.0% by mass, and iron is contained in a range of 0.005% by mass to less than 0.05% by mass.
- the present invention even if the iron content is reduced, if the phosphorus content is appropriately adjusted, it is possible to have sliding properties equivalent to or higher than that of conventional sliding member copper alloys. Moreover, it can have good castability in a similar metal composition.
- This copper alloy for sliding members contains tin, sulfur, iron, and phosphorus in predetermined amounts, with the remainder consisting of copper and inevitable impurities.
- the above copper alloy needs to contain 3.0% by mass or more of tin. Tin has the effect of improving the matrix strength of the copper alloy, improving wear resistance, and maintaining good sliding properties, but if it is less than 3.0% by mass, these effects will be insufficient. It ends up.
- the tin content needs to be 16.0% by mass or less. If it exceeds 16.0% by mass, the mating material will be significantly worn, and good sliding characteristics may not be obtained.
- the tin content is 6.0% by mass or more and 15.0% by mass. It is preferably below, and more preferably 9.0% by mass or more and 11.0% by mass or less.
- the above copper alloy needs to contain 0.3% by mass or more of sulfur.
- Sulfur reacts with copper, iron, or both to form sulfides.
- This sulfide has solid lubricating properties, lowers the coefficient of friction, improves conformability, and provides good sliding characteristics in sliding conditions. If the sulfur content is less than 0.3% by mass, these effects will not be obtained or will be insufficient, so it is preferably 0.5% by mass or more.
- the sulfur content needs to be 3.0% by mass or less. This is because if the content exceeds 3.0% by mass, there is a high possibility that sulfur will reduce the strength.
- the sulfur content is preferably 1.0% by mass or less, more preferably 0.7% by mass or less.
- the above copper alloy needs to contain less than 0.3% by mass of iron. If the iron content is 0.3% by mass or more, the hardness of the copper alloy will increase too much, and when used as a sliding member, there is a high risk that it will attack and wear out the mating material. Or, the performance of the product decreases due to a decrease in elongation. On the other hand, the wear resistance tends to deteriorate as the iron content decreases. Iron, together with sulfur, forms Fe-S compounds that improve the sliding properties of the copper alloy, so the necessary amount of Fe-S compounds is formed to ensure the necessary sliding properties. This is because it is better for the metal to contain iron.
- the iron content is preferably 0.005% by mass or more and less than 0.3% by mass, and 0.005% by mass or more and less than 0.05% by mass. More preferably, it is less than % by mass.
- the above copper alloy needs to contain less than 0.3% by mass of iron from the viewpoint of castability. This is because if the iron content is 0.3% by mass or more, there is a high possibility that casting defects will exist in the product after casting. Further, in order to have sufficient castability, the iron content is preferably 0.07% by mass or less.
- the above copper alloy needs to contain 0.04% by mass or more of phosphorus.
- Phosphorus forms a Cu--P compound with copper and has the effect of increasing the hardness of the entire copper alloy.
- the phosphorus content needs to be 0.5% by mass or less. This is because if phosphorus is present in an amount exceeding 0.5% by mass, the hardness of the entire copper alloy will increase too much and the seizure resistance will decrease.
- the above-mentioned copper alloy contains copper and inevitable impurities other than the above-mentioned elements.
- the content of the elements contained as the above-mentioned unavoidable impurities is preferably as small as possible, and more preferably below the detection limit. Examples of such elements include molybdenum and nickel.
- sliding members using the copper alloy of the present invention include rolling bearings, linear bushes with sliding bearings, cylinder liners, and the like. By using the copper alloy according to the present invention in the parts of these sliding members that require sliding properties, balanced sliding performance can be achieved.
- Suitable manufacturing methods for manufacturing the sliding member according to the present invention include gravity casting, centrifugal casting, die casting, and other casting methods. Cast bodies obtained by any of these casting methods have fewer casting defects as described above, exhibit a good balance of strength, elongation, hardness with respect to wear resistance, and amount of wear. It can be suitably used as a moving member.
- a Brinell hardness test (BO3, manufactured by Imai Seiki Co., Ltd.) was conducted on the cast copper alloy after the above heat treatment, and the Brinell hardness was evaluated.
- the test conditions were a test force of 500 kgf, and a cemented carbide ball with a diameter of 10 mm was used as an indenter.
- Comparative Example 1 the iron content was higher than the range of the present invention, so the elongation performance was decreased. Further, in Comparative Example 2, the tin content is lower than the range of the present invention, and in Comparative Example 3, it is higher than the range of the present invention, so that the hardness performance, elongation, and hardness performance are respectively lowered. Further, in Comparative Example 4, the sulfur content was lower than the range of the present invention, and in Comparative Example 5, it was higher than the range of the present invention, so that the performance of abrasion resistance, tensile strength, and elongation was decreased.
- Examples 9 and 10 have an iron content within the range of the present invention, but Comparative Example 6 has an iron content higher than the range of the present invention.
- Examples 9 and 10 had no casting defects and had good castability, but Comparative Example 6 had casting defects as shown in Fig. 1C, and had good castability. It turns out that it is inferior.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
Provided are: a copper alloy which is to be used in a sliding member and contains tin, sulfur, iron and phosphorus as main components thereof, and has sliding properties which are equal to or better than that of the prior art even when containing no iron or having a low iron content; or a method for producing a sliding member by casting. A copper alloy to be used in a sliding member according to the present invention is characterized by containing tin in the amount of 3.0-16.0 mass%, inclusive, sulfur in the amount of 0.3-1.0 mass%, inclusive, iron in an amount less than 0.3 mass%, and phosphorus in the amount of 0.04-0.5 mass%, inclusive, with the remainder constituting copper and inevitable impurities.
Description
この発明は、摺動部材に用いる、鉛を主な成分として含有しない摺動部材用銅合金に関する。
The present invention relates to a copper alloy for sliding members that does not contain lead as a main component.
従来から使用されていた銅合金は、摺動性や切削性を向上させるために鉛が一定量含有されており、摺動部材としてはＣＡＣ６０３等が使用されていた。しかしながら近年ではＲｏＨＳ指令やその他環境に配慮することが求められていることから、鉛の使用量を低減、もしくは鉛を使用しない銅合金が開発されてきている。
Copper alloys that have been used conventionally contain a certain amount of lead to improve sliding and cutting properties, and CAC603 and the like have been used as sliding members. However, in recent years, due to the RoHS Directive and other environmental considerations, copper alloys that use less lead or do not use lead have been developed.
例えば、特許文献１には摺動部材用銅合金として、実施例においてスズを５．１４質量％以上１５．５４質量％以下、硫黄を０．４２質量％以上１．０４質量％以下、鉄を０．３１質量％以上３．４３質量％以下、リンを０．０１２質量％以上０．０３３質量％以下含有し、残部が銅と不可避的不純物である摺動部材用銅合金が記載されている。
For example, in Patent Document 1, as a copper alloy for sliding members, tin is 5.14% by mass or more and 15.54% by mass or less, sulfur is 0.42% by mass or more and 1.04% by mass or less, and iron is A copper alloy for sliding members is described that contains 0.31% by mass or more and 3.43% by mass or less of phosphorus, 0.012% by mass or more and 0.033% by mass or less, and the balance is copper and unavoidable impurities. .
また、特許文献２には被削性を向上させた銅合金として、スズ、リン、硫黄を含有し、残部が銅及び不可避的不純物からなる銅合金展伸材であって、前記展伸材の長手方向に 垂直な断面（横断面）において、平均直径０．１～１０μｍの硫化物を分散含有し、該硫化物の面積率が０．１～１０％である銅合金展伸材が記載されている。
Further, Patent Document 2 discloses a copper alloy with improved machinability, which contains tin, phosphorus, and sulfur, and the remainder is copper and unavoidable impurities. A wrought copper alloy material is described that contains dispersed sulfides with an average diameter of 0.1 to 10 μm in a cross section perpendicular to the longitudinal direction (cross section), and the area ratio of the sulfides is 0.1 to 10%. ing.
しかしながら、特許文献１に記載の銅合金では、鉄の含有量が規定よりも少ない場合に摺動性が不十分となる問題があった。
However, the copper alloy described in Patent Document 1 has a problem in that sliding properties are insufficient when the iron content is less than the specified value.
また、特許文献２では、鉄以外のスズ、硫黄、リンを含有した銅合金における被削性の効果は記載されているが、摺動性についての記載はない。一般的に被削性が良い切削加工に適した銅合金は、摺動用には適さないとされている。
Further, Patent Document 2 describes the machinability effect of a copper alloy containing tin, sulfur, and phosphorus other than iron, but does not describe the sliding property. Generally speaking, copper alloys with good machinability and suitable for cutting are not suitable for sliding applications.
さらに、鉄の含有量が多い銅合金は鋳造欠陥が発生しやすく、鋳造により銅合金を生産する場合に不良品が多く発生する問題があった。
Furthermore, copper alloys with a high content of iron are prone to casting defects, and when copper alloys are produced by casting, there is a problem in that many defective products are produced.
そこで本発明は、主成分がスズ、硫黄、鉄、リンである摺動部材用銅合金において、鉄が含有しない、もしくは含有量が少ない場合においても、従来技術と同等以上の摺動性を有する摺動部材用銅合金を提供すること、及び摺動性と良好な鋳造性とを有する摺動部材用銅合金を提供することを目的とする。
Therefore, the present invention provides a copper alloy for sliding members whose main components are tin, sulfur, iron, and phosphorus, which has sliding properties equivalent to or better than the conventional technology even when iron is not contained or the iron content is small. It is an object of the present invention to provide a copper alloy for sliding members, and to provide a copper alloy for sliding members that has sliding properties and good castability.
上記の課題を解決するために、本発明にかかる摺動部材用銅合金は、スズを３．０質量％以上１６．０質量％以下、硫黄を０．３質量％以上１．０質量％以下、鉄を０．３質量％未満、リンを０．０４質量％以上０．５質量％以下含有し、残部が銅と不可避的不純物である第一の実施形態であることを特徴とする。
In order to solve the above problems, the copper alloy for sliding members according to the present invention contains 3.0% by mass or more and 16.0% by mass or less of tin and 0.3% by mass or more and 1.0% by mass or less of sulfur. The first embodiment is characterized in that it contains less than 0.3% by mass of iron, 0.04% by mass or more and 0.5% by mass or less of phosphorus, and the balance is copper and unavoidable impurities.
また、本発明にかかる摺動部材用銅合金は、第一の実施形態をさらに限定するスズを６．０質量％以上１５．０質量％以下、鉄を０．００５質量％以上０．３質量％未満含有する第二の実施形態を選択できる。
Further, the copper alloy for sliding members according to the present invention further limits the first embodiment by containing 6.0% by mass or more and 15.0% by mass or less of tin and 0.005% by mass or more and 0.3% by mass of iron. A second embodiment containing less than % can be selected.
さらに、本発明にかかる摺動部材用銅合金は、第一の実施形態をさらに限定するスズを９．０質量％以上１１．０質量％以下、硫黄を０．５質量％以上１．０質量％以下、鉄を０．００５質量％以上０．０５質量％未満含有する第三の実施形態を選択できる。
Furthermore, the copper alloy for a sliding member according to the present invention further limits the first embodiment by containing 9.0% by mass or more and 11.0% by mass of tin and 0.5% by mass or more and 1.0% by mass of sulfur. % or less, a third embodiment containing iron in an amount of 0.005% by mass or more and less than 0.05% by mass can be selected.
本発明としては、第一から第三の実施形態のいずれかの摺動部材用銅合金による鋳造体を選択できる。
In the present invention, a cast body made of a copper alloy for a sliding member according to any one of the first to third embodiments can be selected.
本発明としては、第一から第三の実施形態のいずれかの摺動部材用銅合金による鋳造体からなる摺動部材を選択できる。
In the present invention, a sliding member made of a cast body made of a copper alloy for sliding members according to any one of the first to third embodiments can be selected.
本発明にかかる摺動部材製造方法は、スズを３．０質量％以上１６．０質量％以下、硫黄を０．３質量％以上１．０質量％以下、鉄を０．０７質量％未満、リンを０．０４質量％以上０．５質量％以下含有した銅合金成分となるように溶解し、鋳造することで摺動部材を製造する方法であることを特徴とする。
The method for manufacturing a sliding member according to the present invention includes tin of 3.0% by mass or more and 16.0% by mass or less, sulfur of 0.3% by mass or more and 1.0% by mass or less, and iron less than 0.07% by mass. The method is characterized in that a sliding member is manufactured by melting and casting a copper alloy component containing 0.04% by mass or more and 0.5% by mass or less of phosphorus.
さらに、本発明にかかる摺動部材製造方法は、スズを６．０質量％以上１５．０質量％以下、鉄を０．００５質量％以上０．０５質量％未満含有する実施形態を選択できる。
Further, in the sliding member manufacturing method according to the present invention, an embodiment can be selected in which tin is contained in a range of 6.0% by mass to 15.0% by mass, and iron is contained in a range of 0.005% by mass to less than 0.05% by mass.
本発明によれば、鉄の含有量を低減しても、リンの含有量を適切に調整すれば従来の摺動部材銅合金と同等以上の摺動性を有することができる。また、同様の金属組成において良好な鋳造性を有することができる。
According to the present invention, even if the iron content is reduced, if the phosphorus content is appropriately adjusted, it is possible to have sliding properties equivalent to or higher than that of conventional sliding member copper alloys. Moreover, it can have good castability in a similar metal composition.
以下に、本発明にかかる摺動部材用銅合金について説明する。本摺動部材用銅合金はスズ、硫黄、鉄、リンを所定量含有し、残部が銅と不可避的不純物とからなる銅合金である。
Below, the copper alloy for sliding members according to the present invention will be explained. This copper alloy for sliding members contains tin, sulfur, iron, and phosphorus in predetermined amounts, with the remainder consisting of copper and inevitable impurities.
上記銅合金は、スズを３．０質量％以上含むことが必要である。スズは銅合金のマトリックス強度を向上させ、耐摩耗性を向上させ、かつ、摺動特性を良好に保つ効果があるが、３．０質量％未満であると、これらの効果が不十分となってしまう。一方で、スズの含有量は１６．０質量％以下であることが必要である。１６．０質量％を超えると、相手材を著しく摩耗させてしまい、良好な摺動特性が得られない可能性がある。さらに銅合金の強度、伸び、耐摩耗性に関する硬さや摩耗量といった摺動部材に求められる特性についてバランスの良い銅合金とするため、スズの含有量は６．０質量％以上１５．０質量％以下であると好ましく、９．０質量％以上１１．０質量％以下であるとより好ましい。
The above copper alloy needs to contain 3.0% by mass or more of tin. Tin has the effect of improving the matrix strength of the copper alloy, improving wear resistance, and maintaining good sliding properties, but if it is less than 3.0% by mass, these effects will be insufficient. It ends up. On the other hand, the tin content needs to be 16.0% by mass or less. If it exceeds 16.0% by mass, the mating material will be significantly worn, and good sliding characteristics may not be obtained. Furthermore, in order to create a copper alloy with well-balanced characteristics required for sliding members such as strength, elongation, hardness related to wear resistance, and amount of wear, the tin content is 6.0% by mass or more and 15.0% by mass. It is preferably below, and more preferably 9.0% by mass or more and 11.0% by mass or less.
上記銅合金は、硫黄を０．３質量％以上含むことが必要である。硫黄は銅、鉄、又はそれらの両方と反応して硫化物を形成する。この硫化物は、固体潤滑性を有しており、摩擦係数を低下させ、なじみを良好にし、摺動状態において良好な摺動特性を付与するものとなる。硫黄が０．３質量％未満であると、これらの効果が得られないか、又は不十分となってしまい、０．５質量％以上であることが好ましい。一方で、硫黄の含有量は３．０質量％以下であることが必要である。３．０質量％を超えると硫黄が強度を低下させるおそれが高くなってしまうからである。さらに、十分な摺動性能を発揮させるためには、硫黄の含有量は１．０質量％以下であると好ましく、０．７質量％以下であるとより好ましい。
The above copper alloy needs to contain 0.3% by mass or more of sulfur. Sulfur reacts with copper, iron, or both to form sulfides. This sulfide has solid lubricating properties, lowers the coefficient of friction, improves conformability, and provides good sliding characteristics in sliding conditions. If the sulfur content is less than 0.3% by mass, these effects will not be obtained or will be insufficient, so it is preferably 0.5% by mass or more. On the other hand, the sulfur content needs to be 3.0% by mass or less. This is because if the content exceeds 3.0% by mass, there is a high possibility that sulfur will reduce the strength. Furthermore, in order to exhibit sufficient sliding performance, the sulfur content is preferably 1.0% by mass or less, more preferably 0.7% by mass or less.
上記銅合金は、鉄を０．３質量％未満含むことが必要である。鉄の含有量が０．３質量％以上であると、上記銅合金の硬度が上がりすぎてしまい、摺動部材として用いたときに、相手材を攻撃して摩耗させてしまうおそれが高くなること、もしくは伸びが低下することで製品の性能が低下することである。一方、鉄の成分が少ないほど耐摩耗性は悪化する傾向にある。鉄は、硫黄とともに、上記銅合金の摺動性を向上させるＦｅ－Ｓ系化合物を形成することから、必要な摺動性を確保するために必要な量のＦｅ－Ｓ系化合物が形成されるには、鉄が含有されていたほうが良いためである。よって、硬度、摺動性のバランスの良い銅合金とするためには、鉄の含有量は０．００５質量％以上０．３質量％未満であると好ましく、０．００５質量％以上０．０５質量％以下であるとより好ましい。
The above copper alloy needs to contain less than 0.3% by mass of iron. If the iron content is 0.3% by mass or more, the hardness of the copper alloy will increase too much, and when used as a sliding member, there is a high risk that it will attack and wear out the mating material. Or, the performance of the product decreases due to a decrease in elongation. On the other hand, the wear resistance tends to deteriorate as the iron content decreases. Iron, together with sulfur, forms Fe-S compounds that improve the sliding properties of the copper alloy, so the necessary amount of Fe-S compounds is formed to ensure the necessary sliding properties. This is because it is better for the metal to contain iron. Therefore, in order to obtain a copper alloy with a good balance of hardness and sliding properties, the iron content is preferably 0.005% by mass or more and less than 0.3% by mass, and 0.005% by mass or more and less than 0.05% by mass. More preferably, it is less than % by mass.
また上記銅合金は、鋳造性の観点からも鉄を０．３質量％未満含むことが必要である。鉄の含有量が０．３質量％以上であると鋳造後の製品に鋳造欠陥が存在するおそれが高くなるためである。また、十分な鋳造性を有するためには、鉄の含有量は０.０７質量％以下であると好ましい。
Furthermore, the above copper alloy needs to contain less than 0.3% by mass of iron from the viewpoint of castability. This is because if the iron content is 0.3% by mass or more, there is a high possibility that casting defects will exist in the product after casting. Further, in order to have sufficient castability, the iron content is preferably 0.07% by mass or less.
上記銅合金は、リンを０．０４質量％以上含むことが必要である。リンは、銅との間にＣｕ－Ｐ化合物を形成して、銅合金全体の硬度を増加させる効果がある。この発明にかかる銅合金では、鉄の成分を少なくしても、リンを上記の範囲で含むことにより、摺動性を確保することができる。一方で、リンの含有量は０．５質量％以下である必要がある。０．５質量％を超えてリンが存在すると、銅合金全体の硬度が増加しすぎてしまい、耐焼き付き性が低下してしまうためである。
The above copper alloy needs to contain 0.04% by mass or more of phosphorus. Phosphorus forms a Cu--P compound with copper and has the effect of increasing the hardness of the entire copper alloy. In the copper alloy according to the present invention, even if the iron content is reduced, sliding properties can be ensured by containing phosphorus within the above range. On the other hand, the phosphorus content needs to be 0.5% by mass or less. This is because if phosphorus is present in an amount exceeding 0.5% by mass, the hardness of the entire copper alloy will increase too much and the seizure resistance will decrease.
上記銅合金は、上記の元素以外は銅と不可避的不純物であるとよい。上記不可避的不純物として含有される元素の含有量は少ないほど好ましく、検出限界以下であるとより好ましい。このような元素としては、例えばモリブデン、ニッケルなどが挙げられる。
It is preferable that the above-mentioned copper alloy contains copper and inevitable impurities other than the above-mentioned elements. The content of the elements contained as the above-mentioned unavoidable impurities is preferably as small as possible, and more preferably below the detection limit. Examples of such elements include molybdenum and nickel.
本発明の銅合金を用いた摺動部材としては、例えば転がり軸受、滑り軸受を有するリニアブッシュ、シリンダライナなどが挙げられる。これらの摺動部材の摺動性を要求される部位に本発明にかかる銅合金を用いることで、バランスのとれた摺動性能を発揮する。本発明にかかる摺動部材を製造するための製造方法としては、重力鋳造、遠心力鋳造、ダイカスト鋳造などの鋳造方法が好適なものとして挙げられる。これらのいずれかの鋳造方法により得られる鋳造体は、上記の通り鋳造欠陥の発生が抑えられており、強度、伸び、耐摩耗性に関する硬さや摩耗量についてバランスの良さを発揮し、上記の摺動部材として好適に利用することができる。
Examples of sliding members using the copper alloy of the present invention include rolling bearings, linear bushes with sliding bearings, cylinder liners, and the like. By using the copper alloy according to the present invention in the parts of these sliding members that require sliding properties, balanced sliding performance can be achieved. Suitable manufacturing methods for manufacturing the sliding member according to the present invention include gravity casting, centrifugal casting, die casting, and other casting methods. Cast bodies obtained by any of these casting methods have fewer casting defects as described above, exhibit a good balance of strength, elongation, hardness with respect to wear resistance, and amount of wear. It can be suitably used as a moving member.
（機械的特性試験）
鋳造後の成分が、表１に記載の実施例及び比較例の各成分の質量％と、残部が銅と不可避的不純物となるように調整した原料を、１２００℃に加熱して溶解し、鋳型を用いて銅合金を重力鋳造法により鋳造した。 (Mechanical property test)
Raw materials adjusted so that the components after casting are the mass % of each component of the examples and comparative examples listed in Table 1, with the remainder being copper and unavoidable impurities, are heated to 1200°C and melted, and molded. A copper alloy was cast using gravity casting method.
鋳造後の成分が、表１に記載の実施例及び比較例の各成分の質量％と、残部が銅と不可避的不純物となるように調整した原料を、１２００℃に加熱して溶解し、鋳型を用いて銅合金を重力鋳造法により鋳造した。 (Mechanical property test)
Raw materials adjusted so that the components after casting are the mass % of each component of the examples and comparative examples listed in Table 1, with the remainder being copper and unavoidable impurities, are heated to 1200°C and melted, and molded. A copper alloy was cast using gravity casting method.
(引張試験及び伸び試験)
上記熱処理後の鋳造銅合金をＪＩＳ Ｚ２２４１に規定される平行部の直径５ｍｍの１４Ａ号試験片を用いて引張試験（インストロン５９８２、インストロン株式会社製）を行い、試験片破断時の引張強さ及び伸びにより評価を行った。 (Tensile test and elongation test)
The cast copper alloy after the above heat treatment was subjected to a tensile test (Instron 5982, manufactured by Instron Corporation) using a No. 14A test piece with a diameter of 5 mm in the parallel part specified in JIS Z2241, and the tensile strength at breakage of the test piece was determined. Evaluation was made based on the strength and elongation.
上記熱処理後の鋳造銅合金をＪＩＳ Ｚ２２４１に規定される平行部の直径５ｍｍの１４Ａ号試験片を用いて引張試験（インストロン５９８２、インストロン株式会社製）を行い、試験片破断時の引張強さ及び伸びにより評価を行った。 (Tensile test and elongation test)
The cast copper alloy after the above heat treatment was subjected to a tensile test (Instron 5982, manufactured by Instron Corporation) using a No. 14A test piece with a diameter of 5 mm in the parallel part specified in JIS Z2241, and the tensile strength at breakage of the test piece was determined. Evaluation was made based on the strength and elongation.
(引張試験評価基準)
◎：３００ＭＰａ以上
〇：２００ＭＰａ以上３００ＭＰａ未満
△：１００ＭＰａ以上２００ＭＰａ未満
×：１００ＭＰａ未満 (Tensile test evaluation criteria)
◎: 300MPa or more ○: 200MPa or more and less than 300MPa △: 100MPa or more and less than 200MPa ×: Less than 100MPa
◎：３００ＭＰａ以上
〇：２００ＭＰａ以上３００ＭＰａ未満
△：１００ＭＰａ以上２００ＭＰａ未満
×：１００ＭＰａ未満 (Tensile test evaluation criteria)
◎: 300MPa or more ○: 200MPa or more and less than 300MPa △: 100MPa or more and less than 200MPa ×: Less than 100MPa
(伸び試験評価基準)
◎：２４％以上
〇：１６％以上２４％未満
△：８％以上１６％未満
×：８％未満 (Elongation test evaluation criteria)
◎: 24% or more ○: 16% or more and less than 24% △: 8% or more and less than 16% ×: less than 8%
◎：２４％以上
〇：１６％以上２４％未満
△：８％以上１６％未満
×：８％未満 (Elongation test evaluation criteria)
◎: 24% or more ○: 16% or more and less than 24% △: 8% or more and less than 16% ×: less than 8%
(硬さ試験)
上記熱処理後の鋳造銅合金についてブリネル硬さ試験（ＢＯ３、有限会社今井精機製）を行い、ブリネル硬さにより評価を行った。試験条件は試験力を５００ｋｇｆとし、圧子には直径１０ｍｍ超硬合金球を用いた。 (hardness test)
A Brinell hardness test (BO3, manufactured by Imai Seiki Co., Ltd.) was conducted on the cast copper alloy after the above heat treatment, and the Brinell hardness was evaluated. The test conditions were a test force of 500 kgf, and a cemented carbide ball with a diameter of 10 mm was used as an indenter.
上記熱処理後の鋳造銅合金についてブリネル硬さ試験（ＢＯ３、有限会社今井精機製）を行い、ブリネル硬さにより評価を行った。試験条件は試験力を５００ｋｇｆとし、圧子には直径１０ｍｍ超硬合金球を用いた。 (hardness test)
A Brinell hardness test (BO3, manufactured by Imai Seiki Co., Ltd.) was conducted on the cast copper alloy after the above heat treatment, and the Brinell hardness was evaluated. The test conditions were a test force of 500 kgf, and a cemented carbide ball with a diameter of 10 mm was used as an indenter.
(硬さ試験評価基準)
◎：８０ＨＢ以上１２０ＨＢ未満
〇：６０ＨＢ以上８０ＨＢ未満
△：４０ＨＢ以上６０ＨＢ未満
×：４０ＨＢ未満、もしくは１２０ＨＢ以上 (Hardness test evaluation criteria)
◎: 80HB or more and less than 120HB ○: 60HB or more and less than 80HB △: 40HB or more and less than 60HB ×: Less than 40HB or 120HB or more
◎：８０ＨＢ以上１２０ＨＢ未満
〇：６０ＨＢ以上８０ＨＢ未満
△：４０ＨＢ以上６０ＨＢ未満
×：４０ＨＢ未満、もしくは１２０ＨＢ以上 (Hardness test evaluation criteria)
◎: 80HB or more and less than 120HB ○: 60HB or more and less than 80HB △: 40HB or more and less than 60HB ×: Less than 40HB or 120HB or more
（摩耗量確認試験）
上記熱処理後の鋳造銅合金について、機械加工により、外径７０ｍｍ、厚さ６ｍｍのディスクを用意した。なお、摩擦面は＃８０耐水ペーパー仕上げとした。 (Wear amount confirmation test)
A disk having an outer diameter of 70 mm and a thickness of 6 mm was prepared by machining the cast copper alloy after the above heat treatment. The friction surface was finished with #80 waterproof paper.
上記熱処理後の鋳造銅合金について、機械加工により、外径７０ｍｍ、厚さ６ｍｍのディスクを用意した。なお、摩擦面は＃８０耐水ペーパー仕上げとした。 (Wear amount confirmation test)
A disk having an outer diameter of 70 mm and a thickness of 6 mm was prepared by machining the cast copper alloy after the above heat treatment. The friction surface was finished with #80 waterproof paper.
次に、作製した各実施例のディスク摩擦面に対して、摩擦試験機（ＵＭＴ－ＴｒｉｂｏＬａｂ、Ｂｒｕｋｅｒ製）を用いて摩擦試験を実施した。摩擦試験は、高酸素クロム軸受鋼（ＳＵＪ２）製である直径１０ｍｍのボールをディスクに接触させ、接触面に荷重１０Ｎとなるようにボールを押圧しながら、ボールを２０ｍｍ／ｓの摩擦速度で１５分間、振幅を２ｍｍ(±１ｍｍ)として往復させた。摩擦試験後に３Ｄ形状測定機（ＶＲ－５２００、株式会社キーエンス製）を用い、ディスク摩擦面における摩耗部の幅及び深さから摩耗量を算出した。
Next, a friction test was performed on the disk friction surface of each of the produced Examples using a friction tester (UMT-TriboLab, manufactured by Bruker). In the friction test, a ball with a diameter of 10 mm made of high oxygen chromium bearing steel (SUJ2) was brought into contact with the disc, and while pressing the ball so that a load of 10 N was applied to the contact surface, the ball was rotated at a friction speed of 20 mm/s for 15 minutes. It was reciprocated for 2 minutes at an amplitude of 2 mm (±1 mm). After the friction test, the amount of wear was calculated from the width and depth of the worn part on the disk friction surface using a 3D shape measuring machine (VR-5200, manufactured by Keyence Corporation).
(摩耗量確認試験評価基準)
◎：０．１５ｍｍ3以下
〇：０．１６ｍｍ3以上０．３０ｍｍ3以下
△：０．３１ｍｍ3以上０．４５ｍｍ3以下
×：０．４６ｍｍ3以上 (Abrasion amount confirmation test evaluation criteria)
◎: 0.15mm 3 or less ○: 0.16mm 3 or more 0.30mm 3 or less △: 0.31mm 3 or more 0.45mm 3 or less ×: 0.46mm 3 or more
◎：０．１５ｍｍ3以下
〇：０．１６ｍｍ3以上０．３０ｍｍ3以下
△：０．３１ｍｍ3以上０．４５ｍｍ3以下
×：０．４６ｍｍ3以上 (Abrasion amount confirmation test evaluation criteria)
◎: 0.15mm 3 or less ○: 0.16mm 3 or more 0.30mm 3 or less △: 0.31mm 3 or more 0.45mm 3 or less ×: 0.46mm 3 or more
(機械的特性試験総合評価基準)
◎：全て◎
〇：〇を一つ以上含む、その他は◎
△：△を一つ以上含む、その他は◎又は〇
×：×を少なくとも一つ含む
(Mechanical property test comprehensive evaluation criteria)
◎：All ◎
〇: Contains one or more 〇, others are ◎
△: Contains one or more △, others are ◎ or 〇 ×: Contains at least one ×
◎：全て◎
〇：〇を一つ以上含む、その他は◎
△：△を一つ以上含む、その他は◎又は〇
×：×を少なくとも一つ含む
(Mechanical property test comprehensive evaluation criteria)
◎：All ◎
〇: Contains one or more 〇, others are ◎
△: Contains one or more △, others are ◎ or 〇 ×: Contains at least one ×
表１に示すように、実施例１～８は各成分の含有量が本発明の範囲内であることから、摺動部材として用いるために必要な引張強さ、伸び、硬さ、及び耐摩耗性について良好な性能を有していることがわかる。特に実施例２、７、及び８より、リンの含有量が特許文献１の実施例に記載される量よりも多い０．０４質量％以上であれば、鉄の含有量が０．０５質量％未満であっても非常に良好な性能を有していることがわかる。
As shown in Table 1, Examples 1 to 8 have the content of each component within the range of the present invention, and therefore have the necessary tensile strength, elongation, hardness, and wear resistance for use as a sliding member. It can be seen that it has good performance in terms of properties. In particular, from Examples 2, 7, and 8, if the phosphorus content is 0.04% by mass or more, which is higher than the amount described in the example of Patent Document 1, the iron content is 0.05% by mass. It can be seen that even if the value is less than 1, the performance is very good.
比較例１は鉄の含有量が本発明の範囲よりも多いことから、伸びの性能が低下している。また、比較例２ではスズの含有量が本発明の範囲よりも少なく、比較例３では反対に多いことから、それぞれ硬さの性能、伸びと硬さの性能が低下している。さらに比較例４では、硫黄の含有量が本発明の範囲よりも少なく、比較例５では反対に多いことから、それぞれ耐摩耗性、引張強さと伸びの性能が低下している。
In Comparative Example 1, the iron content was higher than the range of the present invention, so the elongation performance was decreased. Further, in Comparative Example 2, the tin content is lower than the range of the present invention, and in Comparative Example 3, it is higher than the range of the present invention, so that the hardness performance, elongation, and hardness performance are respectively lowered. Further, in Comparative Example 4, the sulfur content was lower than the range of the present invention, and in Comparative Example 5, it was higher than the range of the present invention, so that the performance of abrasion resistance, tensile strength, and elongation was decreased.
（鋳造性試験）
鋳造後の成分が、表２に記載の実施例及び比較例の各成分の質量％と、残部が銅と不可避的不純物となるように調整した原料を、上記引張試験と同様の溶解、鋳造、加工工程により引張試験片を作製し、その後同様の条件で引張試験を行った。引張試験後の破断面を観察することより評価を行った。 (Castability test)
The raw materials were adjusted so that the components after casting were the mass % of each component of the examples and comparative examples listed in Table 2, and the remainder was copper and unavoidable impurities. A tensile test piece was prepared through the processing process, and then a tensile test was conducted under the same conditions. Evaluation was performed by observing the fracture surface after the tensile test.
鋳造後の成分が、表２に記載の実施例及び比較例の各成分の質量％と、残部が銅と不可避的不純物となるように調整した原料を、上記引張試験と同様の溶解、鋳造、加工工程により引張試験片を作製し、その後同様の条件で引張試験を行った。引張試験後の破断面を観察することより評価を行った。 (Castability test)
The raw materials were adjusted so that the components after casting were the mass % of each component of the examples and comparative examples listed in Table 2, and the remainder was copper and unavoidable impurities. A tensile test piece was prepared through the processing process, and then a tensile test was conducted under the same conditions. Evaluation was performed by observing the fracture surface after the tensile test.
(鋳造性試験評価基準)
〇：破断面に鋳造欠陥存在せず
×：破断面に鋳造欠陥存在 (Castability test evaluation criteria)
〇: No casting defect exists on the fracture surface ×: Casting defect exists on the fracture surface
〇：破断面に鋳造欠陥存在せず
×：破断面に鋳造欠陥存在 (Castability test evaluation criteria)
〇: No casting defect exists on the fracture surface ×: Casting defect exists on the fracture surface
表２に示すように、実施例９および１０は鉄の含有量が本発明の範囲内であるが、比較例６は鉄の含有量が本発明の範囲よりも多い。その結果図１Ａ，Ｂに示すように実施例９，１０では鋳造欠陥は存在せず良好な鋳造性を有しているが、比較例６では図１Ｃに示すように鋳造欠陥が存在し鋳造性が劣ることがわかる。
As shown in Table 2, Examples 9 and 10 have an iron content within the range of the present invention, but Comparative Example 6 has an iron content higher than the range of the present invention. As a result, as shown in Fig. 1A and B, Examples 9 and 10 had no casting defects and had good castability, but Comparative Example 6 had casting defects as shown in Fig. 1C, and had good castability. It turns out that it is inferior.
このように、主成分がスズ、硫黄、鉄、リンである摺動部材用銅合金において、鉄とリンの含有量を調整、すなわち鉄を含有しないもしくは従来技術よりも鉄の含有量を低減する一方、リンの含有量を増加することによって、従来技術と同等以上の摺動性を有する摺動部材用銅合金を実現することができる。また、鉄の含有量を低減することで、良好な摺動部材用鋳造銅合金を実現することができる。
In this way, in a copper alloy for sliding parts whose main components are tin, sulfur, iron, and phosphorus, the content of iron and phosphorus is adjusted, that is, it does not contain iron or the iron content is reduced compared to conventional technology. On the other hand, by increasing the phosphorus content, it is possible to realize a copper alloy for sliding members that has sliding properties equivalent to or better than those of the conventional technology. Moreover, by reducing the iron content, a good cast copper alloy for sliding members can be realized.
Claims (7)
- スズを３．０質量％以上１６．０質量％以下、硫黄を０．３質量％以上１．０質量％以下、鉄を０．３質量％未満、リンを０．０４質量％以上０．５質量％以下含有し、残分が銅と不可避的不純物である摺動部材用銅合金。 Tin from 3.0% by mass to 16.0% by mass, sulfur from 0.3% by mass to 1.0% by mass, iron less than 0.3% by mass, phosphorus from 0.04% by mass to 0.5%. A copper alloy for sliding members containing less than % by mass, with the remainder being copper and unavoidable impurities.
- スズを６．０質量％以上１５．０質量％以下、鉄を０．００５質量％以上０．３質量％未満含有することを特徴とする請求項１に記載の摺動部材用銅合金。 The copper alloy for sliding members according to claim 1, characterized in that it contains 6.0% by mass or more and 15.0% by mass or less of tin, and 0.005% by mass or more and less than 0.3% by mass of iron.
- 鉄を０．００５質量％以上０．０５質量％未満含有することを特徴とする請求項１又は請求項２に記載の摺動部材用銅合金。 The copper alloy for sliding members according to claim 1 or 2, characterized in that it contains 0.005% by mass or more and less than 0.05% by mass of iron.
- 請求項１乃至３のいずれかに記載の摺動部材用銅合金による鋳造体。 A cast body made of the copper alloy for sliding members according to any one of claims 1 to 3.
- 請求項１乃至３のいずれかに記載の摺動部材用銅合金による鋳造体からなる摺動部材。 A sliding member made of a cast body made of the copper alloy for sliding members according to any one of claims 1 to 3.
- 鋳造後の成分がスズを３．０質量％以上１６．０質量％以下、硫黄を０．３質量％以上１．０質量％以下、鉄を０．０７質量％未満、リンを０．０４質量％以上０．５質量％以下となるように調整した材料を溶解し、前記溶解した材料を鋳造することを特徴とする、摺動部材の製造方法。 The components after casting are 3.0% by mass or more and 16.0% by mass or less of tin, 0.3% by mass or more and 1.0% by mass of sulfur, less than 0.07% by mass of iron, and 0.04% by mass of phosphorus. % or more and 0.5% or less by mass is melted, and the melted material is cast.
- スズを６．０質量％以上１５．０質量％以下、鉄を０．００５質量％以上０．０５質量％未満含有することを特徴とする請求項６に記載の摺動部材の製造方法。 The method for manufacturing a sliding member according to claim 6, characterized in that it contains 6.0% by mass or more and 15.0% by mass or less of tin, and 0.005% by mass or more and less than 0.05% by mass of iron.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010150649A (en) * | 2008-11-18 | 2010-07-08 | Kurimoto Ltd | Copper alloy for sliding member |
| JP2014001448A (en) * | 2012-05-22 | 2014-01-09 | Kurimoto Ltd | Slide member made of copper alloy |
| JP2015021176A (en) * | 2013-07-22 | 2015-02-02 | 株式会社栗本鐵工所 | Copper alloy slide member |
| JP2018194024A (en) * | 2017-05-12 | 2018-12-06 | 株式会社栗本鐵工所 | Copper alloy-made slide member |
| JP2019137913A (en) * | 2018-02-13 | 2019-08-22 | 株式会社栗本鐵工所 | Copper alloy |
| JP2020183580A (en) * | 2019-05-07 | 2020-11-12 | ミバ・グライトラーガー・オーストリア・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Multi-layer sliding bearing element |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010150649A (en) * | 2008-11-18 | 2010-07-08 | Kurimoto Ltd | Copper alloy for sliding member |
| JP2014001448A (en) * | 2012-05-22 | 2014-01-09 | Kurimoto Ltd | Slide member made of copper alloy |
| JP2015021176A (en) * | 2013-07-22 | 2015-02-02 | 株式会社栗本鐵工所 | Copper alloy slide member |
| JP2018194024A (en) * | 2017-05-12 | 2018-12-06 | 株式会社栗本鐵工所 | Copper alloy-made slide member |
| JP2019137913A (en) * | 2018-02-13 | 2019-08-22 | 株式会社栗本鐵工所 | Copper alloy |
| JP2020183580A (en) * | 2019-05-07 | 2020-11-12 | ミバ・グライトラーガー・オーストリア・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Multi-layer sliding bearing element |
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