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Overview of Metal alloy powder

wallpapers News 2021-07-13
Metal alloy powder refers to a group of metal particles with a particle size of less than 1 mm. Commonly used are single Metal alloy powder, alloy soft magnetic powder, and some refractory compound powder with metallic properties, which are the main raw materials of powder metallurgy.
Development History
The earliest record of the production and application of Metal alloy powder in China was the age of pottery used for the coloring and decoration of pottery, jewelry, and other utensils. Until the beginning of the 20th century, American scientist Kuliji successfully produced tungsten wire with tungsten powder, marking the modern production of Metal alloy powder The beginning. After that, the chemical reduction method promoted the development of early powder metallurgy products and derived the development of vortex grinding method, molten metal atomization method, high-pressure air atomization, water atomization, and various atomization methods to produce high alloys. Powder promotes the development of high-performance powder metallurgy products.
Preparation Process
At present, many methods have been developed for the preparation of Metal alloy powders, which are mainly divided into physical and chemical methods and mechanical methods according to the production principle.
The most important mechanical methods are the atomization method and the mechanical crushing method.
The most important physical and chemical methods are the reduction method, electrolysis method, and hydroxyl method.
The atomization method generally uses high-pressure gas, high-pressure liquid, or high-speed rotating blades to break the metal or alloy melted at high temperature and high pressure into fine droplets, which are then condensed in a collector to obtain an ultra-fine Metal alloy powder. A chemical change has occurred. The atomization method is one of the main methods for producing metal and alloy powders. There are many atomization methods, such as dual-flow atomization, centrifugal atomization, multi-stage atomization, ultrasonic atomization technology, tight-coupling atomization technology, high-pressure gas atomization, laminar flow atomization, ultrasonic tight-coupling atomization, and hot gas atomization, etc.
The atomization method is usually used in the production of Metal alloy powders such as Fe, Sn, Zn, Pb, Cu, etc., and can also be used in the production of alloy powders such as bronze, brass, carbon steel, and alloy steel. The atomization method meets the requirements of 3D printing consumables. Special requirements for powders.
Pros and cons
The atomized powder has the advantages of high sphericity, controllable powder particle size, low oxygen content, low production cost, and adaptability to the production of various Metal alloy powders. It has become the main development direction of high-performance and special alloy powder preparation technology, but the atomization method It has the disadvantages of low production efficiency, low yield of ultra-fine powder, and relatively large energy consumption.
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