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Overview of the mixing process of powder metallurgy density meter and powder metallurgy

Time:2020-07-21 11:37:37 Click:

Because the pore structure of powder metallurgy has a great influence on the physical properties of powder, and powder metallurgy products are based on their needs based on bulk density, wet density, apparent porosity, oil content, etc. as the main certification standards, so The density detection of the formed green body and the sintered body is particularly important.


According to the characteristics of the powder metallurgy industry, the specially developed electronic powder metallurgy density meter has been widely used in the powder metallurgy industry. It only takes two steps to directly read the density value, saving a lot of testing time; compared to labor costs, one investment can save time and labor costs for up to ten years.


The density of the powder metallurgy density meter is resolved to three decimal places: 0.001. For users in the general powder metallurgy industry, it can meet the density test requirements of most industries. The powder metallurgy density meter can display the results: density, volume, volume Percentage, maximum density, minimum density, average density, etc.


Powder metallurgy density meter manufacturers talk about the mixing process of powder metallurgy:


The mixing process of powder metallurgy refers to the process of homogenizing two or more powders with different components. There are basically two mixing methods: mechanical method and chemical method. The mechanical method is widely used to mix the powder or mixture uniformly without chemical reaction. Mechanical mixing can be divided into dry mixing and wet mixing. Dry mixing is widely used in the production of iron-based products; wet mixing is often used to prepare cemented carbide mixtures. Commonly used liquid media for wet mixing are alcohol, gasoline, acetone, water, etc. Chemical mixing is to uniformly mix metal or compound powder with a metal-added salt solution; or all components are mixed in the form of a certain salt solution, and then processed by precipitation, drying and reduction to obtain a uniformly distributed mixture.


Additives that are often added, plasticizers (gasoline, rubber solution, paraffin, etc.) used to improve the strength of compacts or prevent segregation of powder components, lubricants used to reduce friction between particles and between compacts and mold walls (hard Zinc acid, molybdenum disulfide, etc.).


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