Al 7075 powder

Overview of Al 7075 Powder

Al 7075 is one of the highest strength 7000 series aluminum alloys, offering strength superior to many steels. Zinc is the main alloying addition while magnesium imparts strength through precipitation hardening.

Key properties of Al 7075 powder include:

• Exceptionally high tensile and yield strength
• High hardness and good fatigue strength
• Good toughness and moderate ductility
• Excellent finishing characteristics
• High corrosion resistance
• Có sẵn nhiều loại kích cỡ và hình dạng bột

Al 7075 powder is ideal for high-performance aerospace and defense components needing the optimal combination of strength, hardness, fatigue resistance, and moderate weldability.

Chemical Composition of Al 7075 Powder

The typical chemical composition of Al 7075 powder is:

Nguyên tố	Tỉ trọng
Nhôm (Al)	87.1-91.4%
Kẽm (Zn)	5.1-6.1%
Magie (Mg)	2.1-2.9%
Đồng (Cu)	1.2-2.0%
Iron (Fe)	0-0.5%
Silic (Si)	0-0.4%
Mangan (Mn)	0-0.3%
Crom (Cr)	0.18-0.28%
Titanium (Ti)	0-0.2%

Zinc is the primary alloying element while magnesium and copper enhance strength through precipitation hardening. Trace elements like iron, manganese, chromium have minor effects.

Properties of Al 7075 Powder

Key properties of Al 7075 powder include:

Bất động sản	Giá trị
Mật độ	2.81 g/cm3
Điểm Nóng Chảy	477ÿ635¡«C
Độ dẫn nhiệt	130ÿ210 W/mK
Độ dẫn điện	22-30% IACS
Mô-đun Young	71ÿ72 GPa
Hệ số Poisson	0.33
Độ bền kéo	570ÿ635 MPa
Cường độ chảy	505ÿ570 MPa
Kéo dài	7ÿ10%
Độ cứng	150ÿ190 Brinell

 

The zinc additions result in extremely high strength and hardness while maintaining reasonable ductility and toughness. The alloy has excellent finishing characteristics.

Production Method for Al 7075 Powder

Commercial production methods for Al 7075 powder include:

• Gas atomization translated to Vietnamese would be "Phân tử hoá khí."?- Molten alloy stream disintegrated by inert gas jets into fine spherical powder particles with controlled size distribution.
• Nguyên tử hóa nước?- High pressure water jet used to produce fine Al 7075 powders with irregular shape. Lower cost but higher oxygen pickup.
• Hợp kim cơ học?- Ball milling a blend of aluminum and alloying element powders followed by cold compaction and sintering.

Gas atomization offers superior control over powder characteristics like particle size, shape and microstructure.

Applications of Al 7075 Powder

Common applications of Al 7075 powder include:

• sản xuất bồi đắp?- Used in selective laser melting, direct metal laser sintering to produce complex, lightweight aerospace and defense parts.
• Đúc phun kim loại?- To manufacture small intricate components with high strength and moderate corrosion resistance.
• Luân kim thuật bột?- Press and sinter process to create high-performance automotive parts and machinery components.
• "Phun nhiệt"?- Wire arc spraying to deposit very hard and wear resistant Al 7075 coatings.
• Pyrotechnics in Vietnamese is translated as "Pháo Hoa."?- Added as fuel constituent in pyrotechnic compositions due to its high reactivity.
• Vật hàn?- Used as filler wire providing weld strength but limited weldability.

Specifications of Al 7075 Powder

Al 7075 powder is available in various size ranges, shapes, grades and purity levels:

• Kích thước hạt:? 10-45 micromet cho phương pháp AM, tới 120 micromet cho quy tình gián phun nhiệt.
• Hình thái học:?Spherical, irregular and mixed particle shapes. Smooth spherical powder has better flowability.
• Độ tinh khiết:?From commercial to high purity grades tailored for the specific application.
• Điểm?Conforming to ASTM B951, AMS 4045, AMS 4282, EN 573-3 and other equivalent standards.
• Hàm lượng oxy:?Varies between 500-1500 ppm based on production method. Lower is better.

Global Suppliers of Al 7075 Powder

Một số nhà cung cấp lớn trên toàn thế giới là:

• Sandvik Osprey (Anh)
• TLS Technik (Đức)
• Công ty Valimet Inc. (Hoa Kỳ)
• CNPC Bột (Trung Quốc)
• Makin Metal Powders (Vương quốc Anh)
• PyroGenesis Canada
• Công ty bột kim loại (Hoa Kỳ)

These companies produce Al 7075 powder suitable for various applications using different manufacturing processes.

Al 7075 Powder Pricing

Pricing of Al 7075 powder depends on factors like:

• Mức độ tinh khiết
• Đặc điểm của hạt
• Phương pháp sản xuất bột
• Số lượng đơn hàng
• Nhà cung cấp và vị trí địa lý

Lớp	Mức giá
Quảng cáo	$10-20 per kg
Độ tinh khiết cao	$20-40 per kg
Siêu mịn	$40-80 per kg
Hạng đặc biệt	$80-150 per kg

 

Gas atomized, controlled particle size, high purity powders command much higher pricing than simple commercial grade Al 7075 powder.

Storage and Handling of Al 7075 Powder

Al 7075 reactive alloy powder must be handled with care to prevent:

• Quá trình oxy hóa và phản ứng với độ ẩm
• Nguy cơ nổ bụi từ bột mịn
• Các vấn đề sức khỏe liên quan đến việc hít phải
• Cần tuân theo các biện pháp đảm bảo an toàn do nhà cung cấp đề nghị

Inert gas blanketing, proper grounding, ventilation, and PPE should be utilized for safe handling.

Phương pháp thử nghiệm và đặc điểm

Key test methods used for Al 7075 powder include:

• Chemical composition analysis using OES or XRF
• Phân bố kích thước hạt theo tiêu chuẩn ASTM B822
• Phân tích hình thái qua SEM
• Powder flow rate using Hall flowmeter
• Đo mật độ bằng phương pháp pycnometry helium
• Kiểm tra tạp chất bằng ICP-MS
• Phân tích vi cấu trúc bằng nhiễu xạ tia X

These tests ensure the powder meets the required chemical, physical, and microstructural characteristics for the specific application.

Comparison Between Al 7075 and Al 6061 Powder

Al 7075 and Al 6061 are two aluminum alloy powders compared:

Tham số	Al 7075	Al 6061
Loại hợp kim	Có thể xử lý nhiệt	Có thể xử lý nhiệt
Hàm lượng Zn	5.1-6.1%	0%
Hàm lượng Mg	2.1-2.9%	0.8-1.2%
Sức mạnh	Much higher	Vừa đủ
Khả năng gia công	Yếu	Xuất sắc
Khả năng hàn	Yếu	Rất tốt
Khả năng chống ăn mòn	Vừa đủ	Xuất sắc
Chi phí	Cao hơn	Thấp hơn

 

Al 7075 offers very high strength whereas Al 6061 provides better corrosion resistance, weldability and machinability at lower cost.

Al 7075 Powder FAQs

Q: How is Al 7075 powder produced?

A: Al 7075 powder is commercially produced using gas atomization, water atomization, mechanical alloying and electrolysis techniques. Gas atomization offers the best control of particle characteristics.

Q: What are the main applications for Al 7075 powder?

A: The major applications for Al 7075 are additive manufacturing, thermal spray coatings, powder metallurgy parts manufacturing, metal injection molding, and pyrotechnic compositions requiring exceptionally high strength.

Q: What is the recommended particle size for Al 7075 powder in AM?

A: For most metal 3D printing processes, the ideal particle size range for Al 7075 is 15-45 microns with spherical morphology and good powder flowability.

Q: Does Al 7075 powder require any special handling precautions?

A: Yes, it is recommended to handle reactive aluminum alloy powders carefully under inert atmosphere using proper grounding, ventilation and PPE.

Q: Where can I purchase ultrafine Al 7075 powder suitable for aerospace components?

A: High purity, gas atomized ultrafine Al 7075 powders meeting aerospace requirements can be sourced from leading suppliers such as Sandvik Osprey, TLS Technik, and Valimet Inc.