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Production of porous parts in high performance alloys


Sinterized metal filters are produced using powder metallurgical techniques and the most frequently applied is that of uniaxial compactation in matrix by hydraulic or mechanical press. Depending on the type of application, different materials can be used, among which bronze, stainless steels, inconel, hastelloy, monel, aluminum and titanium stand out. In Brazil there is a well-developed market for bronze filters, in which some modest-sized businesses are active. As for other materials, there is a broad market to be explored, especially for stainless steel filters 316L and 304L which are the object of this proposal. Demand exists for various applications, especially in the gases industry with flame-cutter filters, dosers, attenuators, tubes and porous plates for the petrochemical industry and cartridges with or without seams for the alcohol industry, all in stainless steel. Some cases of special filters in inconel, monel and titanium for the chemical and nuclear industries were also identified. In the majority of these applications, allwith high added value, components such as replacement parts are imported and the national industry has enormous difficulty discovering who makes these special parts to measure. The main objective of this research is the determination of the parameters for compactation and sinterization necessary for the elaboration of porous materials with the performance with appropriate characteristics for applications of liquid-solid and solid separation, in the mechanical, chemical and food industries. Phase 1 of the project verified the viability of the production of high technical and commercial performance porous metal parts (filters). Phase 2 seeks to make viable the installation of a manufacturing unit to produce parts which will replace the importation of a part of the porous elements consumed in Brazil. (AU)

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