About the gas atomization method of Foshan stainless steel decorative ball, its production process!
use stainless steel raw materials--Melting in medium frequency induction furnace--Ingredient adjustment--Deoxidization and slag removal--Atomizing powder--Quality inspection--Screening-- The main equipment used for packaging and warehousing include: medium frequency induction furnace, nitrogen source and atomization device, circulating water pool, screening and packaging equipment, testing instruments, etc. Each method has its own advantages and disadvantages: water atomization is the main pulverizing process, its efficiency is high, large-scale production is relatively economical, the powder can be fine, but the shape is irregular, which is conducive to shape preservation, however, more adhesives are used, which affects the accuracy. In addition, the oxide film formed by the high temperature reaction of water and metal hinders sintering.
stainless steel decorative ball Gas atomization method is the main method for producing powder for metal injection molding technology. The powder produced by it is spherical, with low oxidation degree and less binder required, the formability is good, but the yield of extremely fine powder is low, the price is high, the shape retention is poor, and the C, N, H, O in the binder have influence on the sintered body. The powder produced by carbonyl method has high purity, stable beginning and extremely fine particle size. It is suitable for MIM, but only limited to Fe, Ni and other powders and cannot meet the requirements of varieties.
in order to meet the requirements of powder for metal injection molding technology, many powder making companies have improved the above methods and developed powder making methods such as micro-atomization and laminar atomization. At present, water atomized powder is usually mixed with gas atomized powder. The former improves the compaction density while the latter maintains the shape retention. At present, the use of water atomized powder can also produce sintered bodies with a relative density of more than 99%, so only water atomized powder is used for larger parts and gas atomized powder is used for smaller parts.
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