Sintered Porous Metal

Sintered porous metal can be powders of different sintered alloy materials, mainly used for 316L grade or above. It can resist most chemicals and can also be used to produce other grades of powder sintered materials, such as chromium nickel iron alloy, haz alloy, and Monel alloy. Meanwhile, it can also be used for sintering bronze powder media, i.e. porous sintered materials sintered at different temperatures. It can be made into sintered products with a circular or cylindrical shape.

Powder sintered material is a depth based filtering element. The characteristics of sintered porous materials are high efficiency, strong adaptability, simple maintenance, high mechanical and temperature durability, and long service life. Excel filter materials have various levels of porosity, which can be achieved by changing the particle shape, size, and distribution of the metal powder used. By changing the manufacturing process, flowability, porosity, strength, and other special physical properties can be precisely adjusted.

Sintering process in powder metallurgy

Two radically different manufacturing processes and two different kinds of powder are used to produce the porous sintered solid, namely “pressing sintering” and “unconsolidated powder sintering”

Pressing sintering

The powder is cold-pressed to form banks of required density. These so-called green bodies are sintered in a protective gas or vacuum furnace at the temperature corresponding to the material and can be manufactured without any external force or mold.

Unconsolidated powder sintering

Fill these powders to the mold and dispose of the vibrating compacting. Sintering is done in the mold and special furnace gases without additional pressure.

In addition to the above sintering process, material properties can be influenced again according to the process requirements, such as closing the holes purposefully in a place where no flow is needed through mechanical processing and different shape requirements are met through wire cutting or laser cutting. In addition to standard plates, tubes, molded goods, etc., welding components of any size can be made from Excelfilter material.

• Heat stability can be up to 650℃（1020°F）
• Accuracy class can be up to 0.2-80μm
• 30-45% porosity is calculated by volume: 30-45%
• Density: 5-7.5gm/cc

Applications of sintered porous metal

• Hydraulic pressure and fuel
• Nuclear ventilation
• Filtration of HEPA and ULPA
• Filter powder and gather particles from the vacuum and compressed air line.
• Filter polymers, such as Nomex, polyester, polypropylene, polyamide, and nylon.
• Automobile-air filter, lubricant filter, gasbag aerator, recycle of chemicals and catalyst-high temperature liquid filtration, cryogenic fluid, solvent, ketone, liquid hydrocarbon, feedwater, and production water supply, glycol, efficient solid recovery or liquid recovery aerospace engineering.
• Food and drink-process steam filtration, hydrogenation reactor catalyst recovery, polish syrup, wine, and other liquids, eliminate catalyst from spice elements and other food industries, extract activated carbon, and wipe off the color.