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Iron-Based
316L(1.4404)
17-4PH
304L
MS1(1.2709)
FeSi6.5
FeCrAl
HK30
430
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S136
H13
FeNi50
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AlSi10Mg
AlSi7Mg
AlSi12(4047)
AlSi10(4045)
6061
7075
5083
6013
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Specialized in R&D and production of aerosolized alloy powder materials
Brazing common sense
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D50
The particle size corresponding to a powder sample whose cumulative particle size distribution percentage reaches 50%. Physically it means particles larger than 50% of its account, particles smaller than 50% of its account, D50 is also called the median diameter or median particle size.
Specific Surface Area
Specific surface area refers to the total area of the material per unit mass. The unit is m2/g. It usually refers to the specific surface area of a solid material, such as powder, fiber, particle, flake, block and other materials. There is another definition of specific surface area: area/volume. Generally, the finer the powder is, the more irregular the particle shapes, the coarser the particle surface is, the more complex the particle structure is, and the larger the surface ratio is. The larger the powder ratio surface is, the greater the friction between particles is. The powder ratio surface has a great influence on the powder properties such as loose packing density, vibratory density, fluidity, compressibility and formability. Under normal circumstances, the larger the powder than the surface, the smaller the loose density, the worse the fluidity, the more the powder density increases after shaking, and the compressibility decreases, the formability improves. Controlling the specific surface of the powder will improve the stability of the process performance. Since most reactions are carried out on the particle surface, the measurement of the surface is also quite important for controlling the sintering process.
Carney Flow Rate
The flowability of metal powders measured by the Carney funnel method can also be used to compare several powders when some powders flow through the Hall funnel and others do not. Humidity and moisture content affect flow rates, and wet powder may not flow through the Hall funnel or Carney funnel.
Hall Flow Rate
It refers to the time required for a certain amount of powder to flow through a standard funnel with a specified aperture (Hall velocity meter), usually used as a unit of s/50g, the smaller the value indicates the better powder fluidity, which is a process performance of the powder.
Powder Flowability
It refers to the time required for a certain amount of powder to flow through a standard funnel with a specified aperture, usually used as a unit of s/50g, the smaller the value indicates the better powder fluidity, which is a process performance of the powder.
Tapping Density
It is the mass per unit volume measured by the powder in the container after vibration under specified conditions, usually expressed in g/cm³;
Apprarent Density
It is the mass per unit volume of the powder in the natural accumulation state, usually expressed in g/cm³; Apparent density is a comprehensive reflection of a variety of properties of powder, powder metallurgy, mechanical parts production process stability, and product quality control are very important, but also the basis of mold design. There are three methods to measure the bulk density of powder: funnel method; Scott volumetric method; Vibrating funnel method. There are many factors affecting the bulk density of powder, such as particle shape, size, surface roughness and particle size distribution. Usually these factors are significantly different because of difference in the preparation method of powder and its process conditions. Generally speaking, the bulk density of powder decreases with the decrease of particle size, the increase of particle nonsphericity coefficient and the increase of surface roughness.
Average Particle Size
Average Particle Size,if an actual particle group composed of particles of different sizes and shapes is compared with an imaginary particle group composed of uniform spherical particles, the diameter of the spherical particle is said to be the average particle size of the actual particle group.
μm
μm, pronounced (miu), micron, unit of length. A micron is a unit of length, symbol [micron]. A unit of length in the micron metric system [1]. A micron is one millionth the length of a meter, and one thousandth of a millimeter. It is usually used to measure the length of small objects. Micron techniques are used to define systems with physical feature sizes approaching 1μm.
Mesh
Mesh is the number of holes per inch of screen mesh. 50 mesh means 50 holes per inch, and 50*50=2500 holes per square inch. 500 mesh means 500 holes per inch, and 500*500= 250,000 holes per square inch. The higher the number of eyes, the more holes. In addition to representing the holes of the screen, it is also used to express the particle size of the particles able to pass through the screen, the higher the mesh number is, the smaller the particle size is. American standard is now adopted in China.
316L、17-4PH、304L、MS1、FeSi6.5、FeCrAl、HK30、430