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
• Высокая коррозионная стойкость
• Доступен в виде порошков разных грануляций и форм

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:

Элемент	Весовые %
Алюминий (Al)	87.1-91.4%
Цинк (Zn)	5.1-6.1%
Магний (Mg)	2.1-2.9%
Медь (Cu)	1.2-2.0%
Железо (Fe)	0-0.5%
Кремний (Si)	0-0.4%
Марганец (Mn)	0-0.3%
Хром (Cr)	0.18-0.28%
Титан (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:

Имущество	Ценность
Плотность	2.81 g/cm3
Температура плавления	477ÿ635¡«C
Теплопроводность	130ÿ210 W/mK
Электропроводность	22-30% IACS
Модуль Юнга	71ÿ72 GPa
Коэффициент Пуассона	0.33
Прочность на растяжение	570ÿ635 MPa
Предел текучести	505ÿ570 MPa
Удлинение	7ÿ10%
Твердость	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:

• Газовая атомизация?- Molten alloy stream disintegrated by inert gas jets into fine spherical powder particles with controlled size distribution.
• Распыл воды?- High pressure water jet used to produce fine Al 7075 powders with irregular shape. Lower cost but higher oxygen pickup.
• Механический легирования?- 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:

• аддитивное производство?- Used in selective laser melting, direct metal laser sintering to produce complex, lightweight aerospace and defense parts.
• Литье с впрыскиванием металла?- To manufacture small intricate components with high strength and moderate corrosion resistance.
• Порошковая металлургия?- Press and sinter process to create high-performance automotive parts and machinery components.
• Термическое напыление?- Wire arc spraying to deposit very hard and wear resistant Al 7075 coatings.
• Пиротехника?- Added as fuel constituent in pyrotechnic compositions due to its high reactivity.
• Сварочный присадочный материал?- 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:

• Размер частиц:?От 10-45 микрон для методов изготовления AM до 120 микрон для процессов термического напыления.
• Морфология:?Spherical, irregular and mixed particle shapes. Smooth spherical powder has better flowability.
• Чистота:?From commercial to high purity grades tailored for the specific application.
• Оценки:?Conforming to ASTM B951, AMS 4045, AMS 4282, EN 573-3 and other equivalent standards.
• Содержание кислорода:?Varies between 500-1500 ppm based on production method. Lower is better.

Global Suppliers of Al 7075 Powder

Некоторые популярные поставщики:

• Sandvik Osprey (Великобритания)
• TLS Technik (Германия)
• Valimet Inc. (США)
• CNPC Powder (Китай)
• Makin Metal Powders (Великобритания)
• Канадская компания PyroGenesis
• Metal Powder Company (США)

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:

• Уровни чистоты
• Характеристика частиц
• Способ производства порошка
• Количество заказа
• Поставщик и географическое расположение

Класс	Ценовой диапазон
Рекламный	$10-20 per kg
Высокая чистота	$20-40 per kg
Сверхтонкий	$40-80 per kg
Особый класс	$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:

• Окисление и реакция с влагой
• Опасность взрывов от мелкой пыли
• Проблемы со здоровьем, связанные с вдыханием
• Практики безопасности, рекомендованные поставщиком, должны выполняться

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

Методы испытаний и характеристики

Key test methods used for Al 7075 powder include:

• Chemical composition analysis using OES or XRF
• Распределение размеров частиц согласно стандарту ASTM B822
• Анализ морфологии с помощью СЭМ
• Powder flow rate using Hall flowmeter
• Плотность измерения гелиевой пикнометрии
• Проверка на примеси методом ИСП-МС
• Анализ микроструктуры методом рентгеновской дифракции

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:

Параметр	Al 7075	Al 6061
Тип сплава	Поддающийся термообработке	Поддающийся термообработке
Содержание Zn	5.1-6.1%	0%
Содержания Mg	2.1-2.9%	0.8-1.2%
Сила	Much higher	Умеренный
Обрабатываемость	Бедный	Отличный
Свариваемость	Бедный	Очень хорошо
Коррозионная стойкость	Умеренный	Отличный
Цена	Выше	Низкий

 

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.