7075 Aluminium Alloy Powder

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Overview of 7075 Aluminium Alloy Powder

7075 aluminium alloy powder is a strong, hard-wearing aluminium alloy powder commonly used in high-stress aerospace and defence applications. It has high strength-to-density ratio, good fatigue strength, average machinability, and excellent corrosion resistance.

Key properties and applications of 7075 aluminium alloy powder:

CompositionAluminium, zinc, magnesium, copper, chromium, iron, silicon, manganese, titanium, other elements
StrengthVery high strength
HardnessHigh hardness
DensityLow density (2.81 g/cm3)
Corrosion ResistanceExcellent in various environments
Major ApplicationsAircraft structures, defence equipment, marine fittings, high-stress parts

7075 aluminium gets its high strength from precipitation hardening heat treatment. It is weldable but loses some strength during welding. It has lower fracture toughness than other aluminium alloys.

7075 aluminium alloy powder
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Types of 7075 Aluminium Alloy Powder

7075 aluminium alloy powder is available in various types:

Atomized powderSpherical powder produced by atomization process, good flowability
Gas atomized powderMade by inert gas atomization, very spherical, high purity
Water atomized powderIrregular shape, high oxygen content
Plasma atomized powderVery spherical, smooth surface, high purity
Milled powderIrregular shape from mechanical milling

Gas atomized and plasma atomized powders have more uniform particle size distribution and shape ideal for additive manufacturing. Water atomized and milled powder is cheaper but has less sphericity.

Applications and Uses of 7075 Aluminium Powder

Key applications of 7075 aluminium alloy powder include:

AerospaceAircraft fuselages, wings, fittings, fasteners, gears, valves
DefenceArmoured vehicles, weapons, protective equipment
AutomotiveWheels, transmission parts, pistons, valves, drivetrain
MarineBoat hulls, fittings, propellers, deck hardware
Additive manufacturing3D printing of complex, lightweight parts
MachiningHigh-speed CNC machining into complex shapes

7075’s high strength, hardness and fatigue resistance allow it to withstand heavy loads in structural parts for aircraft, vehicles, boats etc. It resists corrosion in marine environments. Its lightweight properties provide fuel savings. It can be 3D printed into complex shapes not possible with casting or machining.

Specifications and Design Standards for 7075 Alloy Powder

Key specifications and design standards for 7075 aluminium alloy powder include:

Alloying elementsZinc 5.1-6.1%, Magnesium 2.1-2.9%, Copper 1.2-2.0%, Iron 0.5% max, Si 0.4% max, Mn 0.3% max
Density2.81 g/cm3
Melting pointApprox. 475°C
StrengthTensile 510-540 MPa, Yield strength 430-505 MPa
HardnessBrinell 150
Shear strength330 MPa
Fatigue strength159 MPa
Thermal conductivity130 W/m-K
DesignationUNS A97075, Aluminium Association 7075, ISO Al Zn5.5MgCu
Applicable standardsAMS 4045, AMS 4127, ASTM B918, ISO 16220, NF L 16-720

Key specifications like alloy composition, mechanical properties, design standards should be reviewed to ensure procurement of high quality 7075 powder for production use.

Suppliers and Pricing of 7075 Aluminium Alloy Powder

Some leading global suppliers of 7075 aluminium alloy powder include:

SupplierDescriptionPrice Range
AlpocoGas atomized, high purity$50-$150/kg
RusalPlasma atomized, for 3D printing$75-$250/kg
Valimet Inc.Different size distributions$30-$100/kg
Makin Metal PowdersWater atomized, economic$20-$60/kg
SandvikCustom alloys and particle sizes$100-$500/kg

Prices vary based on powder shape, size range, gas atomization, specialty alloys, and order volume. Small lab quantities of specialty powder can cost over $500/kg. Bulk volumes of water atomized powder can cost as low as $20/kg.

Installation, Operation and Maintenance of 7075 Powder Production Equipment

Key aspects for installation, operation and maintenance for 7075 aluminium alloy powder production equipment:

InstallationEnsure proper grounding, vacuum lines, water cooling, gas lines, safety devices, ventilation. Follow OEM manuals.
OperationOperate within recommended parameters of temperature, pressure, flow rates. Ensure gas purity, proper feeds.
MaintenanceRegularly inspect and replace wear items like nozzles, o-rings, valves. Check drive motors and pumps. Monitor analyzers.
Powder handlingEnsure proper powder sieving, storage in sealed containers, movement minimizes oxygen exposure.
SafetyWear PPE, ensure gas line integrity, establish SOPs for pressurized systems. Provide fire suppression.
TrainingTrain operators on startup, shutdown, safety, troubleshooting. Emphasize powder flammability risks.

Proper installation, operation and maintenance as per OEM guidelines ensures maximum powder production, quality and safety. Personnel training is key.

How to Select 7075 Aluminium Powder Suppliers

Key factors in selecting suppliers of 7075 aluminium alloy powder:

Powder manufacturing processMatch process like gas atomization to application needs
Composition complianceAlloy composition meets required standards
Particle size distributionDistribution meets product requirements
Sphericity and flowabilityPowder shape and flow properties suitable for usage
Lot testing dataReview test reports for critical powder properties
SamplingAsk for samples to conduct evaluation tests
CertificationsManufacturer should have ISO 9001 certification
R&D capabilitiesCustom alloy development, enhancements
Customer serviceResponsiveness to inquiries, proactive updates
Production capacityAbility to fulfill volume requirements
PricingCompetitive pricing for product specifications
Terms and lead timeAcceptable payment terms and lead time

Carefully evaluating multiple suppliers on these parameters ensures selection of the optimal 7075 powder provider.

7075 aluminium alloy powder
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Pros and Cons of 7075 Aluminium Alloy Powder

Very high strength for low weightLower fracture toughness than other alloys
Excellent fatigue strengthSusceptible to stress corrosion cracking
Good machinability and corrosion resistanceDifficult to weld, requires special procedures
Used for highly stressed aerospace partsExpensive compared to lower strength alloys
Can be precipitation hardened to high strengthsPowder production requires controlled processes
Can be 3D printed into complex shapesSensitive to quenching rate during heat treatment

Key advantages of 7075 powder like high strength and fatigue resistance make it suitable for aircraft and defence applications despite disadvantages like lower toughness and weldability.

7075 aluminium alloy powder
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Q: What is 7075 aluminium alloy powder used for?

A: 7075 aluminium powder is commonly used to make high-strength structural parts for aircraft, defence equipment, and other critical applications where strength and fatigue resistance are paramount.

Q: What manufacturing processes use 7075 aluminium powder?

A: Key processes using 7075 powder include additive manufacturing/3D printing, metal injection molding, spray deposition, powder forging and other powder metallurgy techniques.

Q: What are the contents of 7075 aluminium alloy?

A: 7075 aluminium contains about 90% aluminium along with alloying elements like 5-6% zinc, 2-3% magnesium, 1-2% copper, and traces of silicon, iron, manganese, chromium and other metals.

Q: Is 7075 aluminium powder weldable?

A: Yes, 7075 aluminium can be welded but needs controlled procedures to minimize strength loss in the weld zone and susceptibility to cracking. Proper filler material selection is important.

Q: What are the alternatives to 7075 aluminium alloy powder?

A: Alternatives include 2024, 6061, and 7050 aluminium alloys. 2024 offers better toughness while 6061 trades some strength for better corrosion resistance vs 7075.

Q: What safety precautions are needed when handling 7075 aluminium powder?

A: Key precautions include avoiding all ignition sources, proper grounding of equipment, appropriate respiratory protection, and explosion-proof powder handling equipment. Powder flammability risks must be controlled.

Q: Does additive manufacturing use 7075 aluminium alloy?

A: Yes, 7075 is a popular alloy powder for high-end metal 3D printing when high strength and heat resistance is needed but powder costs are justified. Printing parameters must be optimized to get full properties.

Q: How should 7075 aluminium powder be stored?

A: 7075 powder should be stored in sealed containers in a cool, dry environment to prevent oxidation and contamination from moisture. Desiccant bags can be added to containers to absorb moisture. Proper first-in-first-out (FIFO) stock rotation should be used.

Q: What is the cost of 7075 aluminium alloy powder?

A: Prices can range from $20-500/kg depending on powder shape, size distribution, manufacturing method, order quantity and other factors. Small R&D quantities are most expensive while bulk orders of simple water atomized powder are cheapest.

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