JP2020169378A - Aluminum alloy for compressor slide components and compressor slide component forging - Google Patents
Aluminum alloy for compressor slide components and compressor slide component forging Download PDFInfo
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 58
- 238000005242 forging Methods 0.000 title description 11
- 239000000956 alloy Substances 0.000 claims abstract description 18
- 229910052723 transition metal Inorganic materials 0.000 claims abstract description 16
- 150000003624 transition metals Chemical class 0.000 claims abstract description 16
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 abstract description 5
- 229910052804 chromium Inorganic materials 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 23
- 238000010438 heat treatment Methods 0.000 description 11
- 239000000047 product Substances 0.000 description 10
- 238000005266 casting Methods 0.000 description 9
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- 229910045601 alloy Inorganic materials 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 3
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- 239000000243 solution Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 239000006061 abrasive grain Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 239000006104 solid solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910018473 Al—Mn—Si Inorganic materials 0.000 description 1
- 229910018575 Al—Ti Inorganic materials 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 239000000446 fuel Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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- 229910052720 vanadium Inorganic materials 0.000 description 1
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Abstract
Description
本発明は、自動車エアコン用コンプレッサー（圧縮機）に代表される摺動部品、とりわけスクロールおよび電動スクロールに好適に使用できるアルミニウム合金に関する。 The present invention relates to sliding parts typified by a compressor for an automobile air conditioner, particularly an aluminum alloy that can be suitably used for scrolls and electric scrolls.
近年の自動車業界における燃費向上の要求から、自動車に使用される各種部材、例えばカーエアコン用のコンプレッサーには軽量化、高機能化の要求が高まってきている。カーエアコン用コンプレッサーには種々の形式が存在するが、上述の背景に伴い小型コンプレッサーとしてスクロール型が普及している。このような部材については、鉄鋼材料や鋳鉄材料に代えて、重量に対する強度の比である比強度の大きいアルミニウム合金が使用されてきている。特に上記カーエアコン用コンプレッサーに代表されるような、高温雰囲気下の過酷な環境でも使用し得る高温下高強度を有し、且つ摺動時の耐摩耗性に優れたＡｌ−Ｓｉ系合金等のアルミニウム合金からなる鍛造材が注目されている。 Due to the demand for improving fuel efficiency in the automobile industry in recent years, there is an increasing demand for weight reduction and high functionality in various components used in automobiles, for example, compressors for car air conditioners. There are various types of compressors for car air conditioners, but the scroll type has become widespread as a small compressor due to the above background. For such members, aluminum alloys having a large specific strength, which is the ratio of strength to weight, have been used instead of steel materials and cast iron materials. In particular, Al—Si alloys that have high strength under high temperature and have excellent wear resistance during sliding, such as the compressor for car air conditioners, which can be used in harsh environments under high temperature atmosphere. Forged materials made of aluminum alloy are attracting attention.
この種のアルミニウム合金鍛造材を製造するに際しては、例えば特許文献１に記載されているように、所定の金属組成のアルミニウム合金を金型鋳造にて成形し、所定の熱処理を施すことによってカーエアコン用スクロールを製造することが行われている。 When producing this kind of aluminum alloy forged material, for example, as described in Patent Document 1, a car air conditioner is formed by molding an aluminum alloy having a predetermined metal composition by die casting and performing a predetermined heat treatment. Forging scrolls are being manufactured.
ところで、上記のようなアルミニウム合金を用いてスクロールを製造した場合、機械的特性が不足していることによってスクロールが破壊される恐れがある。即ち、実稼働時に１５０℃の高温環境下に晒されることにより材料が軟化して強度不足となってスクロールが破壊されることがある。このような課題は、ＳｉやＣｕを多量に添加することで解決し得るが、しかしながら、ＳｉやＣｕを多量に添加した場合、初晶Ｓｉの生成、粗大な金属間化合物の生成により、靱性が低下したり、生産性が低下するという問題があった。 By the way, when a scroll is manufactured using an aluminum alloy as described above, the scroll may be destroyed due to lack of mechanical properties. That is, when the material is exposed to a high temperature environment of 150 ° C. during actual operation, the material may be softened, the strength may be insufficient, and the scroll may be destroyed. Such a problem can be solved by adding a large amount of Si or Cu, however, when a large amount of Si or Cu is added, the toughness is increased due to the formation of primary crystal Si and the formation of coarse intermetallic compounds. There was a problem that it decreased and productivity decreased.
本発明は、かかる技術的背景に鑑みてなされたものであって、引張強さ及び破断伸びが十分に得られるコンプレッサー摺動部品用アルミニウム合金およびコンプレッサー摺動部品鍛造品を提供することを目的とする。 The present invention has been made in view of such a technical background, and an object of the present invention is to provide an aluminum alloy for a compressor sliding part and a forged compressor sliding part, which can sufficiently obtain tensile strength and breaking elongation. To do.
前記目的を達成するために、本発明者は鋭意研究の結果、アルミニウム合金においてＳｉ、Ｃｕ、Ｍｇ等の特定の金属の含有率をそれぞれ特定範囲に制御することにより、アルミニウム合金材料の引張強さ及び破断伸びを十分に確保できることを見出すに至り、本発明を完成したものである。即ち、本発明は以下の手段を提供する。 In order to achieve the above object, as a result of diligent research, the present inventor has controlled the content of specific metals such as Si, Cu, and Mg in the aluminum alloy within a specific range, thereby increasing the tensile strength of the aluminum alloy material. The present invention has been completed by finding that sufficient elongation at break can be secured. That is, the present invention provides the following means.
［１］Ｓｉ：３．０質量％〜９．０質量％、Ｃｕ：１．５質量％〜３．５質量％、Ｍｇ：０．１質量％〜０．８質量％を含有し、
Ｍｎ：０．１質量％〜０．９質量％、およびＣｒ：０．０５質量％〜０．５質量％、からなる群より選ばれるいずれか１種の遷移金属を前記含有率で含有し、残部がＡｌ及び不可避不純物からなるアルミニウム合金であって、
前記アルミニウム合金材料の引張強さが３９０ＭＰａ〜４５０ＭＰａであり、前記アルミニウム合金材料の破断伸びが１０．０％以上であることを特徴とするコンプレッサー摺動部品用アルミニウム合金。
[1] Si: 3.0% by mass to 9.0% by mass, Cu: 1.5% by mass to 3.5% by mass, Mg: 0.1% by mass to 0.8% by mass,
Mn: 0.1% by mass to 0.9% by mass, and Cr: 0.05% by mass to 0.5% by mass, any one of the transition metals selected from the group is contained in the above content. The balance is an aluminum alloy composed of Al and unavoidable impurities.
An aluminum alloy for a compressor sliding component, characterized in that the tensile strength of the aluminum alloy material is 390 MPa to 450 MPa and the breaking elongation of the aluminum alloy material is 10.0% or more.
［２］Ｓｉ：３．０質量％〜９．０質量％、Ｃｕ：１．５質量％〜３．５質量％、Ｍｇ：０．１質量％〜０．８質量％を含有し、
Ｍｎ：０．１質量％〜０．９質量％、およびＣｒ：０．０５質量％〜０．５質量％、からなる群より選ばれる２種の遷移金属をそれぞれ前記含有率で含有し、残部がＡｌ及び不可避不純物からなるアルミニウム合金であって、
前記２種の遷移金属の合計含有率が０．１質量％〜１．０質量％であり、
前記アルミニウム合金材料の引張強さが３９０ＭＰａ〜４５０ＭＰａであり、前記アルミニウム合金材料の破断伸びが１０．０％以上であることを特徴とするコンプレッサー摺動部品用アルミニウム合金。
[2] Si: 3.0% by mass to 9.0% by mass, Cu: 1.5% by mass to 3.5% by mass, Mg: 0.1% by mass to 0.8% by mass,
Two kinds of transition metals selected from the group consisting of Mn: 0.1% by mass to 0.9% by mass and Cr: 0.05% by mass to 0.5% by mass are contained in the above-mentioned contents, respectively, and the balance Is an aluminum alloy composed of Al and unavoidable impurities.
The total content of the two transition metals is 0.1% by mass to 1.0% by mass.
An aluminum alloy for a compressor sliding component, characterized in that the tensile strength of the aluminum alloy material is 390 MPa to 450 MPa and the breaking elongation of the aluminum alloy material is 10.0% or more.
［３］前記アルミニウム合金は、さらにＴｉ：０．００１質量％〜０．１質量％を含有する前項１または２に記載のコンプレッサー摺動部品用アルミニウム合金。 [3] The aluminum alloy for compressor sliding parts according to item 1 or 2 above, wherein the aluminum alloy further contains Ti: 0.001% by mass to 0.1% by mass.
［４］前項１〜３のいずれか１項に記載のコンプレッサー摺動部品用アルミニウム合金で構成されたコンプレッサー摺動部品鍛造品。 [4] A forged compressor sliding component made of the aluminum alloy for the compressor sliding component according to any one of items 1 to 3 above.
［５］前項１〜３のいずれか１項に記載のコンプレッサー摺動部品用アルミニウム合金で構成された電動コンプレッサー摺動部品鍛造品。 [5] An electric compressor sliding component forged product made of the aluminum alloy for the compressor sliding component according to any one of the above items 1 to 3.
［１］及び［２］の発明では、引張強さ及び破断伸びが十分に得られるコンプレッサー摺動部品用アルミニウム合金を提供できる。 In the inventions of [1] and [2], it is possible to provide an aluminum alloy for a compressor sliding component which can sufficiently obtain tensile strength and elongation at break.
［３］の発明では、Ｔｉを特定含有率で含有するので、鋳造品の結晶粒微細化に寄与できる。 In the invention of [3], since Ti is contained at a specific content, it can contribute to the refinement of crystal grains in the cast product.
［４］の発明では、十分な引張強さ及び十分な破断伸びを備えたコンプレッサー摺動部品を提供できる。 In the invention of [4], it is possible to provide a compressor sliding component having sufficient tensile strength and sufficient breaking elongation.
［５］の発明では、十分な引張強さ及び十分な破断伸びを備えた電動コンプレッサー摺動部品を提供できる。 In the invention of [5], it is possible to provide an electric compressor sliding component having sufficient tensile strength and sufficient breaking elongation.
本発明に係るコンプレッサー摺動部品用アルミニウム合金は、Ｓｉ：３．０質量％〜９．０質量％、Ｃｕ：１．５質量％〜３．５質量％、Ｍｇ：０．１質量％〜０．８質量％を含有し、Ｍｎ：０．１質量％〜０．９質量％、およびＣｒ：０．０５質量％〜０．５質量％、からなる群より選ばれるいずれか１種の遷移金属を前記含有率で含有し、残部がＡｌ及び不可避不純物からなるアルミニウム合金であって、前記アルミニウム合金材料の引張強さが３９０ＭＰａ〜４５０ＭＰａであり、前記アルミニウム合金材料の破断伸びが１０．０％以上であることを特徴とする。このような構成とすることで、十分な引張強さ及び十分な破断伸びを有したコンプレッサー摺動部品用アルミニウム合金を提供できる。 The aluminum alloy for compressor sliding parts according to the present invention has Si: 3.0% by mass to 9.0% by mass, Cu: 1.5% by mass to 3.5% by mass, Mg: 0.1% by mass to 0. One of the transition metals selected from the group containing 0.8% by mass, Mn: 0.1% by mass to 0.9% by mass, and Cr: 0.05% by mass to 0.5% by mass. Is an aluminum alloy in which the balance is composed of Al and unavoidable impurities, the tensile strength of the aluminum alloy material is 390 MPa to 450 MPa, and the breaking elongation of the aluminum alloy material is 10.0% or more. It is characterized by being. With such a configuration, it is possible to provide an aluminum alloy for a compressor sliding component having sufficient tensile strength and sufficient breaking elongation.
また、本発明に係るコンプレッサー摺動部品用アルミニウム合金は、Ｓｉ：３．０質量％〜９．０質量％、Ｃｕ：１．５質量％〜３．５質量％、Ｍｇ：０．１質量％〜０．８質量％を含有し、Ｍｎ：０．１質量％〜０．９質量％、およびＣｒ：０．０５質量％〜０．５質量％、からなる群より選ばれる２種の遷移金属をそれぞれ前記含有率で含有し、残部がＡｌ及び不可避不純物からなるアルミニウム合金であって、前記２種の遷移金属の合計含有率が０．１質量％〜１．０質量％であり、前記アルミニウム合金材料の引張強さが３９０ＭＰａ〜４５０ＭＰａであり、前記アルミニウム合金材料の破断伸びが１０．０％以上であることを特徴とする。このような構成とすることで、十分な引張強さ及び十分な破断伸びを有したコンプレッサー摺動部品用アルミニウム合金を提供できる。 Further, the aluminum alloy for compressor sliding parts according to the present invention has Si: 3.0% by mass to 9.0% by mass, Cu: 1.5% by mass to 3.5% by mass, Mg: 0.1% by mass. Two transition metals selected from the group containing ~ 0.8% by mass, Mn: 0.1% by mass to 0.9% by mass, and Cr: 0.05% by mass to 0.5% by mass. Is an aluminum alloy in which the balance is composed of Al and unavoidable impurities, and the total content of the two types of transition metals is 0.1% by mass to 1.0% by mass. The tensile strength of the alloy material is 390 MPa to 450 MPa, and the breaking elongation of the aluminum alloy material is 10.0% or more. With such a configuration, it is possible to provide an aluminum alloy for a compressor sliding component having sufficient tensile strength and sufficient breaking elongation.
次に、上述した本発明に係るコンプレッサー摺動部品用アルミニウム合金における「アルミニウム合金」の組成について以下詳述する。 Next, the composition of the "aluminum alloy" in the above-mentioned aluminum alloy for compressor sliding parts according to the present invention will be described in detail below.
前記Ｓｉ（成分）は、強度を向上させる作用を有する。Ｓｉが９．０質量％を超えると、粗大なＳｉ粒子の存在により、靱性が低下し、十分な破断伸びが得られない。一方、Ｓｉが３．０質量％未満では、十分な引張強さが得られない。従って、Ｓｉ含有率は、３．０質量％〜９．０質量％に設定する。中でも、Ｓｉ含有率は、４．５質量％〜７．０質量％に設定するのが好ましい。 The Si (component) has an action of improving strength. When Si exceeds 9.0% by mass, the toughness is lowered due to the presence of coarse Si particles, and sufficient elongation at break cannot be obtained. On the other hand, if Si is less than 3.0% by mass, sufficient tensile strength cannot be obtained. Therefore, the Si content is set to 3.0% by mass to 9.0% by mass. Above all, the Si content is preferably set to 4.5% by mass to 7.0% by mass.
前記Ｃｕ（成分）は、引張強さを向上させる作用を有する。引張強さを向上させる作用はＣｕの析出によるものであり、人工時効処理を施すことによって上記効果が得られる。Ｃｕが１．５質量％未満では、十分な析出強化が得られず、強度を向上できない。一方、Ｃｕが３．５質量％を超えると、十分な強度が得られない。従って、Ｃｕ含有率は、１．５質量％〜３．５質量％に設定する。中でも、Ｃｕ含有率は、２．１質量％〜２．９質量％に設定するのが好ましい。 The Cu (component) has an action of improving tensile strength. The action of improving the tensile strength is due to the precipitation of Cu, and the above effect can be obtained by applying an artificial aging treatment. If Cu is less than 1.5% by mass, sufficient precipitation strengthening cannot be obtained and the strength cannot be improved. On the other hand, if Cu exceeds 3.5% by mass, sufficient strength cannot be obtained. Therefore, the Cu content is set to 1.5% by mass to 3.5% by mass. Above all, the Cu content is preferably set to 2.1% by mass to 2.9% by mass.
前記Ｍｇ（成分）は、引張強さを向上させる作用を有する。Ｍｇは鋳造時に固溶し、人工時効処理時にＳｉやＣｕと化合物を形成して析出することで、引張強さ向上に寄与する。このような効果は、Ｍｇ含有率が０．１質量％以上で顕著に表れ、Ｍｇ含有率が０．８質量％を超えると上記効果が顕著に表れなくなる。従って、Ｍｇ含有率は、０．１質量％〜０．８質量％に設定する。中でも、Ｍｇ含有率は、０．４質量％〜０．７質量％に設定するのが好ましい。 The Mg (component) has an action of improving the tensile strength. Mg dissolves solidly during casting and forms a compound with Si and Cu during artificial aging treatment to precipitate, which contributes to the improvement of tensile strength. Such an effect remarkably appears when the Mg content is 0.1% by mass or more, and the above effect does not remarkably appear when the Mg content exceeds 0.8% by mass. Therefore, the Mg content is set to 0.1% by mass to 0.8% by mass. Above all, the Mg content is preferably set to 0.4% by mass to 0.7% by mass.
前記アルミニウム合金は、ＭｎおよびＣｒからなる群より選ばれる少なくとも１種の遷移金属を含有する。 The aluminum alloy contains at least one transition metal selected from the group consisting of Mn and Cr.
前記Ｍｎ（成分）は、微量添加することにより、再結晶粗大化を抑制し、微細再結晶が得られる。鋳造時に固溶したＭｎは、均質化熱処理や熱間塑性加工時に微細析出し、固溶限度を超えて添加された場合は、鋳造時にＳｉ粒子と化合物を形成し、Ａｌ−Ｍｎ−Ｓｉ系化合物として粒状に晶出する。これらの析出物や晶出物が再結晶温度の上昇や、転移運動に対するピンニング効果を発揮し、再結晶粗大化を抑制できる。このような再結晶粗大化抑制効果は、Ｍｎ含有率が０．１質量％未満では得られ難い。一方、Ｍｎ含有率が０．９質量％を超えると、粗大晶出物を形成して引張強さ等の特性が低下する。従って、Ｍｎ含有率は、０．１質量％〜０．９質量％に設定する。中でも、Ｍｎ含有率は、０．３質量％〜０．５質量％に設定するのが好ましい。 By adding a small amount of Mn (component), recrystallization coarsening is suppressed and fine recrystallization can be obtained. Mn dissolved in solid solution during casting is finely precipitated during homogenization heat treatment or hot plastic working, and when added in excess of the solid solution limit, it forms a compound with Si particles during casting and is an Al-Mn-Si compound. Crystallizes in granular form. These precipitates and crystallized substances can exert a pinning effect on the rise in recrystallization temperature and transition motion, and can suppress recrystallization coarsening. Such an effect of suppressing recrystallization coarsening is difficult to obtain when the Mn content is less than 0.1% by mass. On the other hand, when the Mn content exceeds 0.9% by mass, coarse crystals are formed and properties such as tensile strength are deteriorated. Therefore, the Mn content is set to 0.1% by mass to 0.9% by mass. Above all, the Mn content is preferably set to 0.3% by mass to 0.5% by mass.
前記Ｃｒ（成分）は、Ｍｎと同様に、微量添加により、析出物と晶出物の形成で再結晶粗大化を抑制する効果が得られる。このような効果は、Ｃｒ含有率が０．０５質量％未満では、十分に得られない。一方、Ｃｒ含有率が０．５質量％を超えると、粗大晶出物を形成して引張強さ等の特性が低下する。従って、Ｃｒ含有率は、０．０５質量％〜０．５質量％に設定する。中でも、Ｃｒ含有率は、０．１質量％〜０．３質量％に設定するのが好ましい。 Similar to Mn, the Cr (component) has the effect of suppressing recrystallization coarsening by forming precipitates and crystallization by adding a small amount. Such an effect cannot be sufficiently obtained when the Cr content is less than 0.05% by mass. On the other hand, when the Cr content exceeds 0.5% by mass, coarse crystals are formed and properties such as tensile strength are lowered. Therefore, the Cr content is set to 0.05% by mass to 0.5% by mass. Above all, the Cr content is preferably set to 0.1% by mass to 0.3% by mass.
なお、前記アルミニウム合金が、Ｍｎ及びＣｒからなる群より選ばれる２種の遷移金属の両方を含有する組成である場合には、前記２種の遷移金属の合計含有率が０．１質量％〜１．０質量％の範囲である構成とする。前記２種の遷移金属の合計含有率が１．０質量％を超えると、粗大晶出物を形成して引張強さ等の特性が低下する。中でも、前記２種の遷移金属の合計含有率は、０．３質量％〜０．８質量％の範囲であるのが好ましい。 When the aluminum alloy has a composition containing both of two transition metals selected from the group consisting of Mn and Cr, the total content of the two transition metals is 0.1% by mass or more. The configuration is in the range of 1.0 mass%. When the total content of the two transition metals exceeds 1.0% by mass, coarse crystals are formed and properties such as tensile strength are lowered. Above all, the total content of the two transition metals is preferably in the range of 0.3% by mass to 0.8% by mass.
前記アルミニウム合金は、さらにＴｉ：０．００１質量％〜０．１質量％を含有するのが好ましい。Ｔｉは、微細添加することで鋳造品の結晶粒微細化に寄与する。この効果は、Ｔｉ含有率が０．００１質量％以上になると顕著に表れるが、０．１質量％を超えると、Ｔｉを含む化合物が粗大に晶出して、延性低下をもたらす。従って、Ｔｉは、０．００１質量％〜０．１質量％含有せしめるのが好ましい。中でも、Ｔｉは、０．０１質量％〜０．０８質量％含有せしめるのがより好ましい。また、Ｔｉを含有させる場合は、Ａｌ−Ｔｉ母合金やＴｉＢ2の添加剤の形態で添加してもよい。 The aluminum alloy preferably further contains Ti: 0.001% by mass to 0.1% by mass. Ti contributes to the refinement of crystal grains in the cast product by adding it finely. This effect is remarkable when the Ti content is 0.001% by mass or more, but when it exceeds 0.1% by mass, the compound containing Ti is coarsely crystallized, resulting in a decrease in ductility. Therefore, Ti is preferably contained in an amount of 0.001% by mass to 0.1% by mass. Above all, Ti is more preferably contained in an amount of 0.01% by mass to 0.08% by mass. When Ti is contained, it may be added in the form of an Al—Ti mother alloy or TiB 2 additive.
その他の金属元素として、Ｚｎ、Ｆｅ、Ｎｉ、Ｃｏ、Ｖ、Ｍｏ、Ｚｒ、Ｓｃ、Ｈｆ、Ｃｅ、Ｎｂ、Ｅｒ、Ｙｂは、これらの合計量で最大０．５質量％まで許容できる。０．５質量％を超えると、Ａｌ母相より先に晶出されて粗大晶出物となり延性低下をもたらす。 As other metal elements, Zn, Fe, Ni, Co, V, Mo, Zr, Sc, Hf, Ce, Nb, Er, and Yb can be allowed up to 0.5% by mass in the total amount thereof. If it exceeds 0.5% by mass, it is crystallized before the Al matrix to become coarse crystallization, resulting in a decrease in ductility.
上述した組成のアルミニウム合金を例えば周知の方法で溶製することによって上記合金組成の連続鋳造材（ビレット）を製作し、その連続鋳造材に熱処理を行い、さらに鍛造加工等の塑性加工を行った後、切削加工等を行うことによって、コンプレッサー摺動部品を得ることができる（図３参照）。なお、図３に示すものは、カーエアコン用スクロールであり、５２は底板、５１は、渦巻き状の羽根部である。 A continuous cast material (billet) having the above alloy composition was produced by, for example, melting an aluminum alloy having the above composition by a well-known method, and the continuous cast material was heat-treated and further subjected to plastic working such as forging. After that, a compressor sliding part can be obtained by performing cutting or the like (see FIG. 3). The one shown in FIG. 3 is a scroll for a car air conditioner, 52 is a bottom plate, and 51 is a spiral blade portion.
次に、本発明の一態様であるカーエアコン用摺動部品の製造方法の一例について説明する。 Next, an example of a method for manufacturing a sliding component for a car air conditioner, which is one aspect of the present invention, will be described.
まず上述したように成分調整されたアルミニウム合金溶湯を連続鋳造する。電動スクロールの製造を想定した場合、例えば直径６０ｍｍ〜８０ｍｍ程度の寸法で鋳造する。押出を用いて上記直径の鍛造用ビレットを得ることもできるが、製造コストが高価になるので、鋳造加工により鍛造用ビレットを得るのが好ましい。 First, the molten aluminum alloy whose composition has been adjusted as described above is continuously cast. Assuming the manufacture of an electric scroll, for example, casting is performed with a diameter of about 60 mm to 80 mm. Although it is possible to obtain a forging billet having the above diameter by extrusion, it is preferable to obtain a forging billet by casting because the manufacturing cost is high.
得られた鋳造材は、鋳造時に晶出物の偏析等が起きているため、均質化熱処理を施すが、この均質化熱処理では加熱温度を４６０℃〜５１０℃に設定し、処理時間を０．５時間〜６時間に設定するのが好ましい。 Since the obtained cast material undergoes homogenization heat treatment because segregation of crystallized material occurs during casting, the homogenization heat treatment sets the heating temperature to 460 ° C. to 510 ° C. and sets the treatment time to 0. It is preferably set to 5 to 6 hours.
次に、鋳造材を所定の長さに切断し、鍛造用ビレットを得る。鍛造工程では、金型温度を１００℃〜３００℃とし、素材温度を３７０℃〜５１０℃に設定するのが好ましい。 Next, the cast material is cut to a predetermined length to obtain a forging billet. In the forging step, it is preferable to set the mold temperature to 100 ° C. to 300 ° C. and the material temperature to 370 ° C. to 510 ° C.
次いで、前記鍛造用ビレットに溶体化処理を行う。この溶体化処理では、加熱の温度を４５０℃〜５１０℃に設定し、処理時間を０．５時間〜８．０時間に設定するのが好ましい。 Next, the forging billet is subjected to a solution treatment. In this solution treatment, it is preferable to set the heating temperature to 450 ° C. to 510 ° C. and the treatment time to 0.5 hours to 8.0 hours.
次に、焼入れ処理を行う。この焼入れ処理は、１０℃〜８０℃の水で急冷するのが好ましい。 Next, quenching is performed. This quenching treatment is preferably quenched with water at 10 ° C to 80 ° C.
次いで、人工時効処理を行う。この人工時効処理は、加熱処理温度を１６０℃〜２２０℃とし、加熱処理時間を１時間〜１８時間に設定するのが好ましい。 Then, artificial aging treatment is performed. In this artificial aging treatment, it is preferable that the heat treatment temperature is set to 160 ° C. to 220 ° C. and the heat treatment time is set to 1 hour to 18 hours.
次に、人工時効処理を施した鍛造品を機械加工にて切削した後、ピーニングし表面近傍に塑性加工を加えて疲労強度を向上させる。このショットピーニング工程では、砥粒サイズは１ｍｍ以下とし、砥粒種はＳＵＳ３０４、アルミナ等を用い、ピーニング圧力は１ＭＰａ以下とするのが好ましい。 Next, after the forged product subjected to the artificial aging treatment is cut by machining, peening is performed and plastic working is applied in the vicinity of the surface to improve the fatigue strength. In this shot peening step, it is preferable that the abrasive grain size is 1 mm or less, the abrasive grain type is SUS304, alumina or the like, and the peening pressure is 1 MPa or less.
以上のようにして製造された本発明に係るコンプレッサー摺動部品鍛造品は、優れた引張強さおよび十分な破断伸びを備えており、カーエアコン用として好適である。 The forged compressor sliding component according to the present invention manufactured as described above has excellent tensile strength and sufficient breaking elongation, and is suitable for car air conditioners.
次に、本発明の具体的実施例について説明するが、本発明はこれら実施例のものに特に限定されるものではない。 Next, specific examples of the present invention will be described, but the present invention is not particularly limited to those of these examples.
＜実施例１〜４、比較例１〜１２＞
表１に示す合金組成（不可避不純物を含む）に調製したアルミニウム合金溶湯を、連続鋳造にて鋳造して直径８２ｍｍの鋳造材１０を得た（図１参照）。鋳造時の冷却速度は１５℃／秒とした。得られた鋳造材に対し４７０℃で７時間の均質化熱処理を行った後、空冷した。前記鋳造材を長さ３０ｍｍに切断した後、素材温度４２０℃、金型温度１８０℃で鍛造した。鍛造においては、スクロール鍛造品の底板５２を想定し鋳造材の軸方向と平行な方向に８０％の据え込みを行って鍛造材２０を得た（図２参照）。次に、前記鍛造材に４９５℃で３時間加熱して溶体化処理を行った後、２５℃の水にて水焼入れ処理を行った。次いで、加熱処理温度１８０℃で８時間加熱する人工時効処理を行って、Ｔ６鍛造品を得た。
<Examples 1 to 4, Comparative Examples 1 to 12>
The molten aluminum alloy prepared to the alloy composition (including unavoidable impurities) shown in Table 1 was cast by continuous casting to obtain a
上記のようにして得られたＴ６鍛造品について下記評価法に基づいて評価した。これらの評価結果を表１に示す。 The T6 forged product obtained as described above was evaluated based on the following evaluation method. The results of these evaluations are shown in Table 1.
＜引張強さ及び破断伸びの測定法＞
得られた鍛造品から切り出し加工を行って、ＪＩＳ Ｚ２２０１−２０１１年に規定のＪＩＳ４号引張試験片を得た。この引張試験片に対してＪＩＳ Ｚ２２４１−２０１１年の規定に準拠して引張試験を行うことによって引張強さ及び破断伸びを測定した。
<Measurement method of tensile strength and breaking elongation>
The obtained forged product was cut out to obtain a JIS No. 4 tensile test piece specified in JIS Z2201-2011. Tensile strength and elongation at break were measured by conducting a tensile test on this tensile test piece in accordance with JIS Z2241-2011.
表から明らかなように、本発明に係る実施例１〜４のアルミニウム合金を用いた鍛造品は、大きい引張強さが得られると共に、十分な破断伸びが得られた。 As is clear from the table, the forged products using the aluminum alloys of Examples 1 to 4 according to the present invention obtained a large tensile strength and a sufficient elongation at break.
これに対し、本発明の規定範囲を逸脱する比較例１、３〜１２では、引張強さが不十分であり、比較例２、４、６、７、９、１１、１２では、破断伸びが不十分であった。 On the other hand, in Comparative Examples 1 and 3 to 12 which deviate from the specified range of the present invention, the tensile strength is insufficient, and in Comparative Examples 2, 4, 6, 7, 9, 11 and 12, the elongation at break is high. It was inadequate.
本発明に係るコンプレッサー摺動部品用アルミニウム合金で構成されたコンプレッサー摺動部品は、自動車エアコン用コンプレッサー（圧縮機）に代表される摺動部品、とりわけスクロール、電動スクロールとして好適に使用できる。 The compressor sliding component made of the aluminum alloy for the compressor sliding component according to the present invention can be suitably used as a sliding component represented by a compressor (compressor) for an automobile air conditioner, particularly a scroll and an electric scroll.
１０…鋳造材
２０…鍛造材
５０…コンプレッサー摺動部品鍛造品
10 ...
Claims (5)
Ｍｎ：０．１質量％〜０．９質量％、およびＣｒ：０．０５質量％〜０．５質量％、からなる群より選ばれるいずれか１種の遷移金属を前記含有率で含有し、残部がＡｌ及び不可避不純物からなるアルミニウム合金であって、
前記アルミニウム合金材料の引張強さが３９０ＭＰａ〜４５０ＭＰａであり、前記アルミニウム合金材料の破断伸びが１０．０％以上であることを特徴とするコンプレッサー摺動部品用アルミニウム合金。 Si: 3.0% by mass to 9.0% by mass, Cu: 1.5% by mass to 3.5% by mass, Mg: 0.1% by mass to 0.8% by mass,
Mn: 0.1% by mass to 0.9% by mass, and Cr: 0.05% by mass to 0.5% by mass, any one of the transition metals selected from the group is contained in the above content. The balance is an aluminum alloy composed of Al and unavoidable impurities.
An aluminum alloy for a compressor sliding component, characterized in that the tensile strength of the aluminum alloy material is 390 MPa to 450 MPa and the breaking elongation of the aluminum alloy material is 10.0% or more.
Ｍｎ：０．１質量％〜０．９質量％、およびＣｒ：０．０５質量％〜０．５質量％、からなる群より選ばれる２種の遷移金属をそれぞれ前記含有率で含有し、残部がＡｌ及び不可避不純物からなるアルミニウム合金であって、
前記２種の遷移金属の合計含有率が０．１質量％〜１．０質量％であり、
前記アルミニウム合金材料の引張強さが３９０ＭＰａ〜４５０ＭＰａであり、前記アルミニウム合金材料の破断伸びが１０．０％以上であることを特徴とするコンプレッサー摺動部品用アルミニウム合金。 Si: 3.0% by mass to 9.0% by mass, Cu: 1.5% by mass to 3.5% by mass, Mg: 0.1% by mass to 0.8% by mass,
Two kinds of transition metals selected from the group consisting of Mn: 0.1% by mass to 0.9% by mass and Cr: 0.05% by mass to 0.5% by mass are contained in the above-mentioned contents, respectively, and the balance Is an aluminum alloy composed of Al and unavoidable impurities.
The total content of the two transition metals is 0.1% by mass to 1.0% by mass.
An aluminum alloy for a compressor sliding component, characterized in that the tensile strength of the aluminum alloy material is 390 MPa to 450 MPa and the breaking elongation of the aluminum alloy material is 10.0% or more.
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| JPH02107738A (en) * | 1988-10-18 | 1990-04-19 | Nippon Light Metal Co Ltd | Wear-resistant aluminum alloy stock for machining excellent in toughness |
| JP2007070666A (en) * | 2005-09-05 | 2007-03-22 | Showa Denko Kk | Aluminum alloy bar, aluminum alloy blank for forging, method for manufacturing aluminum alloy bar, method for manufacturing aluminum alloy bar for forging, method for manufacturing aluminum alloy blank for forging, manufacturing line for aluminum alloy bar for forging, and cold forged product |
| JP2008111153A (en) * | 2006-10-30 | 2008-05-15 | Hitachi Metals Ltd | Aluminum die casting alloy and compressor impeller using the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH02107738A (en) * | 1988-10-18 | 1990-04-19 | Nippon Light Metal Co Ltd | Wear-resistant aluminum alloy stock for machining excellent in toughness |
| JP2007070666A (en) * | 2005-09-05 | 2007-03-22 | Showa Denko Kk | Aluminum alloy bar, aluminum alloy blank for forging, method for manufacturing aluminum alloy bar, method for manufacturing aluminum alloy bar for forging, method for manufacturing aluminum alloy blank for forging, manufacturing line for aluminum alloy bar for forging, and cold forged product |
| JP2008111153A (en) * | 2006-10-30 | 2008-05-15 | Hitachi Metals Ltd | Aluminum die casting alloy and compressor impeller using the same |
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