7050アルミニウム合金パウダー
目次
概要 7050アルミニウム合金粉
7050 aluminium alloy powder is a strong, tough, heat-treatable alloy powder that has high strength properties combined with excellent fatigue resistance. It is part of the 7xxx series of aluminium alloys, with zinc being the primary alloying element.
7050 alloy powder offers a high strength-to-weight ratio and is commonly used in structural and high-stress applications in the aerospace, automotive, and defence industries. Parts made from 7050 powder metallurgy techniques can replace components traditionally made of steel, titanium or nickel alloys.
Some key properties and characteristics of 7050 aluminium alloy powder include:
7050 Aluminium Alloy Powder Properties
| プロパティ | 詳細 |
|---|---|
| 合金指定 | 7050 |
| 合金元素 | Zinc, magnesium, copper, zirconium |
| 密度 | 2.83 g/cm3 |
| 融点 | Around 635°C |
| 強さ | Very high, with ultimate tensile strength over 510 MPa after heat treatment |
| 疲労強度 | Excellent compared to other 7xxx alloys |
| 耐食性 | Moderate, less than pure aluminium |
| 導電率 | 良好な電気および熱伝導性 |
| 作業性 | Fair machinability and formability |
| 溶接性 | Low due to high alloy content |
The high zinc and copper content in 7050 powder enables heat treatment to achieve very high yield and tensile strengths while also providing good fatigue resistance compared to other aerospace aluminium alloys.
The following sections provide more details on the composition, processing methods, properties, applications, specifications, pricing, advantages and limitations of 7050 aluminium alloy powder.
Composition of 7050 aluminium alloy powder
The 7050 aluminium alloy consists of the following typical elemental composition:
7050 Aluminium Alloy Composition
| エレメント | 重量 % |
|---|---|
| アルミニウム（Al） | 87.7 – 91.4% |
| 亜鉛 | 5.7 – 6.7% |
| マグネシウム (Mg) | 1.9 – 2.6% |
| 銅（Cu） | 2.0 – 2.5% |
| ジルコニウム（Zr） | 0.08 – 0.15% |
| Other (Fe, Si, Mn, Cr, Ti) | <0.15% each |
The high levels of zinc enable precipitation hardening heat treatments to achieve very high strength. Magnesium and copper add to the age hardening effects with zinc.
Zirconium is added for grain structure control. Iron, silicon, manganese, chromium and titanium are present as impurity elements with small individual limits.
7050アルミニウム合金粉 加工
7050 aluminium alloy powder can be manufactured into fully-dense powder metallurgy components using techniques like:
- 熱間静水圧プレス（HIP）
- Direct hot extrusion
- 金属射出成形
HIP involves encapsulating the powder in a container and applying heat and very high isostatic pressures in special vessels to consolidate the powder. This avoids prior compaction steps and achieves uniform properties and net shape or near-net shape parts.
Direct hot extrusion involves compacting powder into billets and then forcing it through a die to produce long profiles or rods. The high pressure and heat bond the particles during deformation into a fully dense product.
Metal injection molding allows shaping more complex net or near-net shape parts from powder using specialized tooling. The powder-binder mixture known as feedstock is injected into molds and then subjected to debinding and sintering.
The 7050 aluminium alloy powder itself is atomized from molten alloys into fine spherical powders around 10 – 45 microns diameter using inert gas atomization or water atomization processes. The purity, particle size distribution, morphology and surface oxide content is carefully controlled to enable full density during consolidation.
7050 aluminium alloy powder Properties
The properties of parts made from 7050 aluminium alloy powder can be tailored by varying processing parameters. Some typical properties after heat treatment are:
7050 Aluminium Alloy Powder Properties
| プロパティ | アズヒップ・コンディション | T6 Heat-Treated | T7 Heat-Treated |
|---|---|---|---|
| メカニカル | |||
| 引張強度 | Around 350 MPa | Over 510 MPa | Around 490 MPa |
| 降伏強度 | Around 310 MPa | Over 455 MPa | Around 415 MPa |
| 伸び | Over 10% | Around 11% | Around 12% |
| 硬度 | Around 150 HB | Over 175 HB | Around 170 HB |
| フィジカル | |||
| 密度 | 2.83 g/cm3 | 2.83 g/cm3 | 2.83 g/cm3 |
| 電気伝導率 | 43% IACS | 36% IACS | 39% IACS |
| その他 | |||
| 賞味期限 | Excellent, 5 years typical | – | – |
| 耐食性 | Good in peak-aged temper | Good in peak-aged temper | Good in peak-aged temper |
| 溶接性 | 貧しい | 貧しい | 貧しい |
| 加工性 | フェア | フェア | フェア |
| 疲労強度 | 素晴らしい | 素晴らしい | 素晴らしい |
The T6 temper involves solution heat treatment followed by artificial aging to achieve peak strength. T7 conditioning applies an overaging treatment after T6 to provide improved stress corrosion cracking resistance at slightly reduced strength levels.
7050 alloy powder has low density combined with high strength levels leading to excellent specific strength properties. The thermal and electrical conductivity is moderate for an aluminium alloy. Corrosion resistance is poorer than pure aluminium but acceptable in most environments.
Fatigue strength in particular is outstanding for aerospace aluminium alloys, while machinability and weldability is inferior to more formable alloys like 6061 due to the high zinc levels.
7050 aluminium alloy powder Applications
The combination of properties makes 7050 aluminium alloy powder suitable for:
Applications of 7050 Aluminium Alloy Powder
| 産業 | 申し込み | Reasons |
|---|---|---|
| 航空宇宙 | Structural airframe parts, landing gear, wings, fittings | High strength-to-weight ratio, fatigue performance |
| 自動車 | Chassis, suspension, transmission cases | High specific strength, replaces cast alloys |
| インダストリアル | Robotics, rigging, lifting equipment | Strength, weldability issues less critical |
| Defence | Armour plate, military vehicles | Ballistic protection, moderate density |
| マリン | Brackets, naval ship parts | 海洋環境における耐食性 |
| スポーツ | Bicycle parts, golf club heads | Performance characteristics |
For aerospace use, 7050 is second in use only to 7075 aluminium alloy for strength-critical airframe components requiring durability. HIP processed parts tend to replace forgings and billet-based parts.
Automotive and defence applications take advantage of lightweighting and performance over more conventional aluminium or magnesium alloys, with improved mechanical properties over composites.
7050 aluminium alloy powder Specifications
7050 alloy powder and consolidated products meet various specifications that define the composition limits, processing methods, properties and quality requirements for aerospace and defence applications:
7050 Aluminium Alloy Powder Specifications
| スタンダード | タイトル |
|---|---|
| AMS 4282 | Metallic Powder for PM Structural Parts |
| AMS 4285 | Alloy HIP Consolidated Powder for PM Structural Parts |
| ASTM B947 | Powder Metallurgy (PM) Aluminum Alloys |
| AA 7050 | Aluminum Association 7050 Alloy |
Specifications cover powder size distribution, shape and flow characteristics, impurity limits, typical density and mechanical properties in different heat treatment conditions, sampling procedures, testing methods, inspection criteria and documentation requirements.
7050 aluminium alloy powder Suppliers
Some leading global suppliers of 7050 aluminium alloy powders include:
7050 Aluminium Alloy Powder Suppliers
| 会社概要 | 所在地 |
|---|---|
| サンドビック・オスプレイ | 英国 |
| アルポコ | 英国 |
| ヴァリメット社 | アメリカ |
These companies offer gas- or water-atomized 7050 aluminium alloy powders customized for additive manufacturing or metal injection molding feedstock applications with specialized particle size distributions and shapes.
In addition, major metal powder producers and consolidators have extensive experience working with 7050 alloy systems optimized for hot isostatic pressing to aerospace component specifications.
7050 aluminium alloy powder Cost
7050 aluminium alloy powder prices depend significantly on:
- Purity / Impurity levels
- Particles size distribution
- 形態と形状
- 購入数量
- Additional processing like sieving
Indicative pricing for gas-atomized spherical 7050 powder suitable for additive manufacturing is around $50 – $65 per kg. Prices are higher for tighter distributions needed for MIM feedstocks or hot isostatic pressing.
7050 aluminium alloy powder Pros and Cons
Advantages of 7050 Aluminium Alloy Powder
- Highest strength 7xxx series alloy
- Excellent fatigue performance
- 低密度
- Used extensively in aerospace industry
- Replaces steels and titanium alloys
- Parts can be complex, monolithic shapes
の制限事項 7050アルミニウム合金パウダー
- 中程度の耐食性
- Weldability issues
- Lower thermal / electrical conductivity
- コストは通常の押出合金より高い
- 加工にはより多くの管理と資格がある
パフォーマンス・アプリケーションで必要とされる多くの重要な構造部品にとって、7050は強度、耐損傷性、低重量の重要な組み合わせを提供します。いくつかの加工や腐食の欠点はあるものの、重量を節約することが重要な場合には、わずかに高い粉末コストを相殺する機能を備えています。
よくあるご質問
7050アルミニウム合金パウダーのよくある質問
Q: 7050アルミ合金とは何ですか？
A: 7050は、亜鉛、マグネシウム、銅に加え、ジルコニウムのような微量の添加物を含む非常に高強度の7xxx系アルミニウム合金です。7050は、引張特性と耐疲労性の卓越した組み合わせを達成するために時効硬化性です。
Q: 7050は7075より強いのですか？
A: はい、7050アルミ合金の極限引張強度と降伏強度は、ピーク時効熱処理を施した非常に人気のある7075アルミ合金よりもわずかに高く、優れた疲労強度を有しています。耐食性は7075と同等です。
Q: 7050アルミの用途は何ですか？
A：主な用途は、主翼のスキン、フィッティング、パイロンなどの航空機構造部品、スピンドルなどのヘリコプター・ローター部品、自動車シャーシやサスペンション部品、装甲、宇宙ブーム、リフティング装置などの用途、ゴルフクラブヘッドや自転車リムなどのスポーツ用品などである。
Q: どのような加工方法で7050合金の部品を作ることができますか？
A: 7050は、押出や鍛造のような伝統的な鍛造工程で製造することができますが、粉末冶金技術は、熱間静水圧プレス（HIP）、直接熱間押出、金属射出成形（MIM）など、7050合金の強みを生かすために急速に発展しています。
Q: 7050アルミは溶接できますか？
A: いいえ、7050合金の溶接は、亜鉛と銅の含有量が多いため割れが発生しやすく、中強度以下の合金に比べて非常に困難です。メカニカル・ファスナーや接着剤による接合方法が推奨されます。
Q: 7050アルミ合金に代わるものは何ですか？
A: 疲労寿命がそれほど重要でない最高強度の要求に対しては、C465や7085のような超高強度航空宇宙用アルミ合金が、7050合金の特定の用途を置き換えるために評価されています。複合材料や高度な金属合金も競合するソリューションです。
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