Powder sintered porous filter alloy, preparation method thereof and pre-compression molded body

Abstract

The invention discloses a powder sintered porous filter alloy, a preparation method of the alloy and a pre-compression molded body for preparing the alloy. The alloy is basically prepared from the ingredients in percentage by mass: 14-17% of Cr, 15-17% of Mo, 0-7% of Fe, 0-4.5% of W, 0-2.5% of Co, 0-0.08% of C, 0-1% of Si, 0-1% of Mn, 0-0.35% of V, 0-0.04% of P, 0-0.03% of S, 0-5% of Al, 0-1.5% of Ti and the balance of Ni; when the alloy is used for filtering liquid, the average pore size is not greater than 20 microns, and the relative coefficient of permeability is not smaller than 0.2m<3> / m<2>.kPa.h; when the alloy is used for filtering gas, the average pore size is not greater than 60 microns, and the relative coefficient of gas permeability is not smaller than 80m<3> / m<2>.kPa.h. The alloy shows superior corrosion resistance in both an oxidizing system and a reducing system; secondly, the alloy is mainly resistant to wet chlorine, various oxidizing chlorides, chloride salt solutions, sulfuric acid and oxidizing salts. The alloy is suitable for being applied to the industrial fields of chemical industry, petrochemical industry, flue gas desulfurization, pulp and paper making, environmental protection and the like.

Description

technical field [0001] The invention relates to a sintered porous filter material, in particular to a powder sintered porous filter alloy, a preparation method of the alloy and a pre-pressed molded body for preparing the alloy. Background technique [0002] The applicant's current research on powder sintered porous filter materials focuses on the expansion of material application fields, improvement of material performance, exploration of pore-forming mechanism and optimization of preparation process. In the expansion of the application field of sintered porous filter materials, it is boldly proposed to develop corresponding ones that can meet the requirements of chemical stability (such as corrosion resistance) in this application environment and have good filtration performance for some specific and relatively harsh application environments. new material. Its significance is that if this type of new material is successfully developed, it will be able to bring precision fi...

AI Technical Summary

Problems solved by technology

However, in the development process of new materials, in addition to the research on material composition, many problems in the process of sintering porosity are often faced, such as: sintering densification, material tortuosity after sintering is too large to affect permeability, material pore size hard to control etc.

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